1 | /*========================================================================= |
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2 | |
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3 | Program: Visualization Toolkit |
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4 | Module: vtkRpAxisActor2D.cxx |
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5 | |
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6 | Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen |
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7 | All rights reserved. |
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8 | See Copyright.txt or http://www.kitware.com/Copyright.htm for details. |
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9 | |
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10 | This software is distributed WITHOUT ANY WARRANTY; without even |
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11 | the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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12 | PURPOSE. See the above copyright notice for more information. |
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13 | |
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14 | =========================================================================*/ |
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15 | #include "vtkRpAxisActor2D.h" |
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16 | |
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17 | #include "vtkCellArray.h" |
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18 | #include "vtkObjectFactory.h" |
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19 | #include "vtkPolyData.h" |
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20 | #include "vtkPolyDataMapper2D.h" |
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21 | #include "vtkTextMapper.h" |
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22 | #include "vtkTextProperty.h" |
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23 | #include "vtkViewport.h" |
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24 | #include "vtkWindow.h" |
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25 | #include "vtkMath.h" |
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26 | |
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27 | vtkStandardNewMacro(vtkRpAxisActor2D); |
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28 | |
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29 | vtkCxxSetObjectMacro(vtkRpAxisActor2D,LabelTextProperty,vtkTextProperty); |
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30 | vtkCxxSetObjectMacro(vtkRpAxisActor2D,TitleTextProperty,vtkTextProperty); |
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31 | |
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32 | //---------------------------------------------------------------------------- |
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33 | // Instantiate this object. |
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34 | vtkRpAxisActor2D::vtkRpAxisActor2D() |
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35 | { |
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36 | this->PositionCoordinate->SetCoordinateSystemToNormalizedViewport(); |
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37 | this->PositionCoordinate->SetValue(0.0, 0.0); |
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38 | |
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39 | this->Position2Coordinate->SetCoordinateSystemToNormalizedViewport(); |
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40 | this->Position2Coordinate->SetValue(0.75, 0.0); |
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41 | this->Position2Coordinate->SetReferenceCoordinate(NULL); |
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42 | |
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43 | this->NumberOfLabels = 5; |
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44 | |
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45 | this->Title = NULL; |
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46 | |
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47 | this->TitlePosition = 0.5; |
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48 | |
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49 | this->AdjustLabels = 1; |
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50 | |
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51 | this->TickLength = 5; |
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52 | this->MinorTickLength = 3; |
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53 | this->TickOffset = 2; |
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54 | this->NumberOfMinorTicks = 0; |
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55 | |
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56 | this->Range[0] = 0.0; |
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57 | this->Range[1] = 1.0; |
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58 | |
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59 | this->FontFactor = 1.0; |
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60 | this->LabelFactor = 0.75; |
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61 | |
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62 | this->SizeFontRelativeToAxis = 0; |
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63 | |
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64 | this->RulerMode = 0; |
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65 | this->RulerDistance = 1.0; |
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66 | |
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67 | this->LabelTextProperty = vtkTextProperty::New(); |
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68 | this->LabelTextProperty->SetBold(1); |
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69 | this->LabelTextProperty->SetItalic(1); |
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70 | this->LabelTextProperty->SetShadow(1); |
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71 | this->LabelTextProperty->SetFontFamilyToArial(); |
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72 | |
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73 | this->TitleTextProperty = vtkTextProperty::New(); |
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74 | this->TitleTextProperty->ShallowCopy(this->LabelTextProperty); |
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75 | |
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76 | this->LabelFormat = new char[8]; |
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77 | sprintf(this->LabelFormat,"%s","%-#6.3g"); |
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78 | |
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79 | this->TitleMapper = vtkTextMapper::New(); |
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80 | this->TitleActor = vtkActor2D::New(); |
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81 | this->TitleActor->SetMapper(this->TitleMapper); |
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82 | |
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83 | // To avoid deleting/rebuilding create once up front |
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84 | this->NumberOfLabelsBuilt = 0; |
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85 | this->LabelMappers = new vtkTextMapper * [VTK_MAX_LABELS]; |
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86 | this->LabelActors = new vtkActor2D * [VTK_MAX_LABELS]; |
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87 | for ( int i=0; i < VTK_MAX_LABELS; i++) |
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88 | { |
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89 | this->LabelMappers[i] = vtkTextMapper::New(); |
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90 | this->LabelActors[i] = vtkActor2D::New(); |
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91 | this->LabelActors[i]->SetMapper(this->LabelMappers[i]); |
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92 | } |
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93 | |
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94 | this->Axis = vtkPolyData::New(); |
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95 | this->AxisMapper = vtkPolyDataMapper2D::New(); |
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96 | this->AxisMapper->SetInput(this->Axis); |
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97 | this->AxisActor = vtkActor2D::New(); |
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98 | this->AxisActor->SetMapper(this->AxisMapper); |
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99 | |
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100 | this->AxisVisibility = 1; |
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101 | this->TickVisibility = 1; |
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102 | this->LabelVisibility = 1; |
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103 | this->TitleVisibility = 1; |
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104 | |
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105 | this->LastPosition[0] = this->LastPosition[1] = 0; |
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106 | this->LastPosition2[0] = this->LastPosition2[1] = 0; |
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107 | |
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108 | this->LastSize[0] = this->LastSize[1] = 0; |
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109 | this->LastMaxLabelSize[0] = this->LastMaxLabelSize[1] = 0; |
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110 | } |
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111 | |
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112 | //---------------------------------------------------------------------------- |
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113 | vtkRpAxisActor2D::~vtkRpAxisActor2D() |
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114 | { |
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115 | if (this->LabelFormat) |
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116 | { |
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117 | delete [] this->LabelFormat; |
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118 | this->LabelFormat = NULL; |
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119 | } |
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120 | |
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121 | this->TitleMapper->Delete(); |
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122 | this->TitleActor->Delete(); |
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123 | |
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124 | if (this->Title) |
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125 | { |
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126 | delete [] this->Title; |
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127 | this->Title = NULL; |
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128 | } |
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129 | |
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130 | if (this->LabelMappers != NULL ) |
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131 | { |
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132 | for (int i=0; i < VTK_MAX_LABELS; i++) |
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133 | { |
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134 | this->LabelMappers[i]->Delete(); |
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135 | this->LabelActors[i]->Delete(); |
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136 | } |
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137 | delete [] this->LabelMappers; |
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138 | delete [] this->LabelActors; |
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139 | } |
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140 | |
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141 | this->Axis->Delete(); |
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142 | this->AxisMapper->Delete(); |
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143 | this->AxisActor->Delete(); |
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144 | |
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145 | this->SetLabelTextProperty(NULL); |
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146 | this->SetTitleTextProperty(NULL); |
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147 | } |
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148 | |
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149 | //---------------------------------------------------------------------------- |
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150 | // Build the axis, ticks, title, and labels and render. |
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151 | |
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152 | int vtkRpAxisActor2D::RenderOpaqueGeometry(vtkViewport *viewport) |
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153 | { |
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154 | int i, renderedSomething=0; |
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155 | |
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156 | this->BuildAxis(viewport); |
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157 | |
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158 | // Everything is built, just have to render |
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159 | if ( this->Title != NULL && this->Title[0] != 0 && this->TitleVisibility ) |
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160 | { |
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161 | renderedSomething += this->TitleActor->RenderOpaqueGeometry(viewport); |
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162 | } |
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163 | |
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164 | if ( this->AxisVisibility || this->TickVisibility ) |
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165 | { |
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166 | renderedSomething += this->AxisActor->RenderOpaqueGeometry(viewport); |
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167 | } |
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168 | |
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169 | if ( this->LabelVisibility ) |
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170 | { |
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171 | for (i=0; i<this->NumberOfLabelsBuilt; i++) |
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172 | { |
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173 | renderedSomething += |
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174 | this->LabelActors[i]->RenderOpaqueGeometry(viewport); |
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175 | } |
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176 | } |
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177 | |
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178 | return renderedSomething; |
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179 | } |
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180 | |
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181 | //---------------------------------------------------------------------------- |
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182 | // Render the axis, ticks, title, and labels. |
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183 | |
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184 | int vtkRpAxisActor2D::RenderOverlay(vtkViewport *viewport) |
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185 | { |
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186 | int i, renderedSomething=0; |
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187 | |
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188 | // Everything is built, just have to render |
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189 | if ( this->Title != NULL && this->Title[0] != 0 && this->TitleVisibility ) |
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190 | { |
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191 | renderedSomething += this->TitleActor->RenderOverlay(viewport); |
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192 | } |
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193 | |
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194 | if ( this->AxisVisibility || this->TickVisibility ) |
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195 | { |
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196 | renderedSomething += this->AxisActor->RenderOverlay(viewport); |
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197 | } |
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198 | |
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199 | if ( this->LabelVisibility ) |
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200 | { |
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201 | for (i=0; i<this->NumberOfLabelsBuilt; i++) |
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202 | { |
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203 | renderedSomething += this->LabelActors[i]->RenderOverlay(viewport); |
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204 | } |
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205 | } |
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206 | |
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207 | return renderedSomething; |
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208 | } |
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209 | |
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210 | //----------------------------------------------------------------------------- |
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211 | // Description: |
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212 | // Does this prop have some translucent polygonal geometry? |
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213 | int vtkRpAxisActor2D::HasTranslucentPolygonalGeometry() |
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214 | { |
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215 | return 0; |
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216 | } |
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217 | |
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218 | //---------------------------------------------------------------------------- |
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219 | // Release any graphics resources that are being consumed by this actor. |
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220 | // The parameter window could be used to determine which graphic |
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221 | // resources to release. |
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222 | void vtkRpAxisActor2D::ReleaseGraphicsResources(vtkWindow *win) |
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223 | { |
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224 | this->TitleActor->ReleaseGraphicsResources(win); |
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225 | for (int i=0; i < VTK_MAX_LABELS; i++) |
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226 | { |
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227 | this->LabelActors[i]->ReleaseGraphicsResources(win); |
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228 | } |
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229 | this->AxisActor->ReleaseGraphicsResources(win); |
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230 | } |
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231 | |
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232 | //---------------------------------------------------------------------------- |
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233 | void vtkRpAxisActor2D::PrintSelf(ostream& os, vtkIndent indent) |
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234 | { |
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235 | this->Superclass::PrintSelf(os,indent); |
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236 | |
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237 | if (this->TitleTextProperty) |
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238 | { |
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239 | os << indent << "Title Text Property:\n"; |
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240 | this->TitleTextProperty->PrintSelf(os,indent.GetNextIndent()); |
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241 | } |
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242 | else |
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243 | { |
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244 | os << indent << "Title Text Property: (none)\n"; |
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245 | } |
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246 | |
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247 | if (this->LabelTextProperty) |
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248 | { |
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249 | os << indent << "Label Text Property:\n"; |
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250 | this->LabelTextProperty->PrintSelf(os,indent.GetNextIndent()); |
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251 | } |
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252 | else |
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253 | { |
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254 | os << indent << "Label Text Property: (none)\n"; |
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255 | } |
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256 | |
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257 | os << indent << "Title: " << (this->Title ? this->Title : "(none)") << "\n"; |
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258 | os << indent << "Ruler Mode: " |
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259 | << (this->RulerMode ? "On" : "Off") <<"\n"; |
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260 | os << indent << "Ruler Distance: " << this->GetRulerDistance() <<"\n"; |
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261 | os << indent << "Number Of Labels: " << this->NumberOfLabels << "\n"; |
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262 | os << indent << "Number Of Labels Built: " |
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263 | << this->NumberOfLabelsBuilt << "\n"; |
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264 | os << indent << "Range: (" << this->Range[0] |
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265 | << ", " << this->Range[1] << ")\n"; |
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266 | |
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267 | os << indent << "Label Format: " << this->LabelFormat << "\n"; |
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268 | os << indent << "Font Factor: " << this->FontFactor << "\n"; |
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269 | os << indent << "Label Factor: " << this->LabelFactor << "\n"; |
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270 | os << indent << "Tick Length: " << this->TickLength << "\n"; |
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271 | os << indent << "Tick Offset: " << this->TickOffset << "\n"; |
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272 | |
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273 | os << indent << "Adjust Labels: " |
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274 | << (this->AdjustLabels ? "On\n" : "Off\n"); |
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275 | |
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276 | os << indent << "Axis Visibility: " |
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277 | << (this->AxisVisibility ? "On\n" : "Off\n"); |
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278 | |
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279 | os << indent << "Tick Visibility: " |
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280 | << (this->TickVisibility ? "On\n" : "Off\n"); |
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281 | |
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282 | os << indent << "Label Visibility: " |
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283 | << (this->LabelVisibility ? "On\n" : "Off\n"); |
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284 | |
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285 | os << indent << "Title Visibility: " |
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286 | << (this->TitleVisibility ? "On\n" : "Off\n"); |
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287 | |
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288 | os << indent << "MinorTickLength: " << this->MinorTickLength << endl; |
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289 | os << indent << "NumberOfMinorTicks: " << this->NumberOfMinorTicks |
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290 | << endl; |
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291 | os << indent << "TitlePosition: " << this->TitlePosition << endl; |
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292 | |
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293 | os << indent << "Size Font Relative To Axis: " |
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294 | << (this->SizeFontRelativeToAxis ? "On\n" : "Off\n"); |
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295 | } |
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296 | |
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297 | //---------------------------------------------------------------------------- |
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298 | void vtkRpAxisActor2D::BuildAxis(vtkViewport *viewport) |
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299 | { |
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300 | int i, *x, viewportSizeHasChanged, positionsHaveChanged; |
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301 | vtkIdType ptIds[2]; |
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302 | double p1[3], p2[3], offset; |
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303 | double interval, deltaX, deltaY; |
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304 | double xTick[3]; |
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305 | double theta, val; |
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306 | int *size, stringSize[2]; |
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307 | char string[512]; |
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308 | |
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309 | if (this->TitleVisibility && !this->TitleTextProperty) |
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310 | { |
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311 | vtkErrorMacro(<<"Need title text property to render axis actor"); |
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312 | return; |
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313 | } |
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314 | |
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315 | if (this->LabelVisibility && !this->LabelTextProperty) |
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316 | { |
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317 | vtkErrorMacro(<<"Need label text property to render axis actor"); |
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318 | return; |
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319 | } |
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320 | |
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321 | // Check to see whether we have to rebuild everything |
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322 | // Viewport change may not require rebuild |
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323 | positionsHaveChanged = 0; |
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324 | int *lastPosition = |
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325 | this->PositionCoordinate->GetComputedViewportValue(viewport); |
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326 | int *lastPosition2 = |
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327 | this->Position2Coordinate->GetComputedViewportValue(viewport); |
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328 | if (lastPosition[0] != this->LastPosition[0] || |
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329 | lastPosition[1] != this->LastPosition[1] || |
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330 | lastPosition2[0] != this->LastPosition2[0] || |
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331 | lastPosition2[1] != this->LastPosition2[1] ) |
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332 | { |
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333 | positionsHaveChanged = 1; |
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334 | } |
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335 | |
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336 | // See whether fonts have to be rebuilt (font size depends on viewport size) |
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337 | viewportSizeHasChanged = 0; |
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338 | size = viewport->GetSize(); |
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339 | if (this->LastSize[0] != size[0] || this->LastSize[1] != size[1]) |
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340 | { |
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341 | viewportSizeHasChanged = 1; |
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342 | this->LastSize[0] = size[0]; |
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343 | this->LastSize[1] = size[1]; |
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344 | } |
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345 | |
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346 | if ( ! viewport->GetVTKWindow() || |
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347 | (!positionsHaveChanged && !viewportSizeHasChanged && |
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348 | viewport->GetMTime() < this->BuildTime && |
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349 | viewport->GetVTKWindow()->GetMTime() < this->BuildTime && |
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350 | this->GetMTime() < this->BuildTime && |
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351 | (!this->LabelVisibility || |
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352 | this->LabelTextProperty->GetMTime() < this->BuildTime) && |
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353 | (!this->TitleVisibility || |
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354 | this->TitleTextProperty->GetMTime() < this->BuildTime)) ) |
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355 | { |
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356 | return; |
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357 | } |
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358 | |
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359 | vtkDebugMacro(<<"Rebuilding axis"); |
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360 | |
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361 | // Initialize and get important info |
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362 | this->Axis->Initialize(); |
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363 | this->AxisActor->SetProperty(this->GetProperty()); |
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364 | this->TitleActor->SetProperty(this->GetProperty()); |
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365 | |
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366 | // Compute the location of tick marks and labels |
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367 | |
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368 | this->UpdateAdjustedRange(); |
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369 | |
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370 | interval = (this->AdjustedRange[1] - this->AdjustedRange[0]) / (this->AdjustedNumberOfLabels - 1); |
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371 | |
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372 | this->NumberOfLabelsBuilt = this->AdjustedNumberOfLabels; |
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373 | |
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374 | // Generate the axis and tick marks. |
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375 | // We'll do our computation in viewport coordinates. First determine the |
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376 | // location of the endpoints. |
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377 | x = this->PositionCoordinate->GetComputedViewportValue(viewport); |
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378 | p1[0] = x[0]; |
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379 | p1[1] = x[1]; |
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380 | p1[2] = 0.0; |
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381 | this->LastPosition[0] = x[0]; |
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382 | this->LastPosition[1] = x[1]; |
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383 | |
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384 | x = this->Position2Coordinate->GetComputedViewportValue(viewport); |
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385 | p2[0] = x[0]; |
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386 | p2[1] = x[1]; |
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387 | p2[2] = 0.0; |
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388 | this->LastPosition2[0] = x[0]; |
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389 | this->LastPosition2[1] = x[1]; |
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390 | |
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391 | double *xp1, *xp2, len=0.0; |
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392 | if ( this->SizeFontRelativeToAxis ) |
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393 | { |
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394 | xp1 = this->PositionCoordinate->GetComputedDoubleDisplayValue(viewport); |
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395 | xp2 = this->Position2Coordinate->GetComputedDoubleViewportValue(viewport); |
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396 | len = sqrt((xp2[0]-xp1[0])*(xp2[0]-xp1[0]) + (xp2[1]-xp1[1])*(xp2[1]-xp1[1])); |
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397 | } |
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398 | |
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399 | vtkPoints *pts = vtkPoints::New(); |
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400 | vtkCellArray *lines = vtkCellArray::New(); |
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401 | this->Axis->SetPoints(pts); |
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402 | this->Axis->SetLines(lines); |
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403 | pts->Delete(); |
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404 | lines->Delete(); |
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405 | |
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406 | // Generate point along axis (as well as tick points) |
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407 | deltaX = p2[0] - p1[0]; |
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408 | deltaY = p2[1] - p1[1]; |
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409 | |
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410 | if (deltaX == 0. && deltaY == 0.) |
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411 | { |
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412 | theta = 0.; |
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413 | } |
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414 | else |
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415 | { |
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416 | theta = atan2(deltaY, deltaX); |
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417 | } |
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418 | |
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419 | // First axis point, where first tick is located |
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420 | ptIds[0] = pts->InsertNextPoint(p1); |
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421 | xTick[0] = p1[0] + this->TickLength*sin(theta); |
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422 | xTick[1] = p1[1] - this->TickLength*cos(theta); |
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423 | xTick[2] = 0.0; |
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424 | pts->InsertNextPoint(xTick); |
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425 | |
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426 | // Set up creation of ticks |
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427 | double p21[3], length; |
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428 | p21[0] = p2[0] - p1[0]; |
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429 | p21[1] = p2[1] - p1[1]; |
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430 | p21[2] = p2[2] - p1[2]; |
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431 | length = vtkMath::Normalize(p21); |
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432 | |
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433 | int numTicks; |
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434 | double distance; |
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435 | if ( this->RulerMode ) |
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436 | { |
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437 | double wp1[3], wp2[3], wp21[3], wLength, wDistance; |
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438 | this->PositionCoordinate->GetValue(wp1); |
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439 | this->Position2Coordinate->GetValue(wp2); |
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440 | wp21[0] = wp2[0] - wp1[0]; |
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441 | wp21[1] = wp2[1] - wp1[1]; |
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442 | wp21[2] = wp2[2] - wp1[2]; |
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443 | wLength = vtkMath::Norm(wp21); |
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444 | wDistance = this->RulerDistance / (this->NumberOfMinorTicks+1); |
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445 | numTicks = (wDistance <= 0.0 ? 0 : static_cast<int>(wLength / wDistance)+1); |
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446 | wDistance *= numTicks; |
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447 | distance = (length / (numTicks-1)) * (wDistance/wLength); |
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448 | } |
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449 | else |
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450 | { |
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451 | numTicks = (this->AdjustedNumberOfLabels-1) * |
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452 | (this->NumberOfMinorTicks+1) + 1; |
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453 | distance = length / (numTicks-1); |
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454 | } |
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455 | |
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456 | for (i = 1; i < numTicks - 1; i++) |
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457 | { |
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458 | int tickLength = 0; |
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459 | if ( i % (this->NumberOfMinorTicks+1) == 0 ) |
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460 | { |
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461 | tickLength = this->TickLength; |
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462 | } |
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463 | else |
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464 | { |
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465 | tickLength = this->MinorTickLength; |
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466 | } |
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467 | xTick[0] = p1[0] + i * p21[0] * distance; |
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468 | xTick[1] = p1[1] + i * p21[1] * distance; |
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469 | pts->InsertNextPoint(xTick); |
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470 | xTick[0] = xTick[0] + tickLength * sin(theta); |
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471 | xTick[1] = xTick[1] - tickLength * cos(theta); |
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472 | pts->InsertNextPoint(xTick); |
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473 | } |
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474 | |
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475 | // Last axis point |
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476 | ptIds[1] = pts->InsertNextPoint(p2); |
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477 | xTick[0] = p2[0] + this->TickLength*sin(theta); |
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478 | xTick[1] = p2[1] - this->TickLength*cos(theta); |
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479 | pts->InsertNextPoint(xTick); |
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480 | |
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481 | // Add the axis if requested |
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482 | if (this->AxisVisibility) |
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483 | { |
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484 | lines->InsertNextCell(2, ptIds); |
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485 | } |
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486 | |
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487 | // Create lines representing the tick marks |
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488 | if (this->TickVisibility) |
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489 | { |
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490 | for (i = 0; i < numTicks; i++) |
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491 | { |
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492 | ptIds[0] = 2*i; |
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493 | ptIds[1] = 2*i + 1; |
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494 | lines->InsertNextCell(2, ptIds); |
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495 | } |
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496 | } |
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497 | |
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498 | // Build the labels |
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499 | if (this->LabelVisibility) |
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500 | { |
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501 | // Update the labels text. Do it only if the range has been adjusted, |
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502 | // i.e. if we think that new labels must be created. |
---|
503 | // WARNING: if LabelFormat has changed, they should be recreated too |
---|
504 | // but at this point the check on LabelFormat is "included" in |
---|
505 | // UpdateAdjustedRange(), which is the function that update |
---|
506 | // AdjustedRangeBuildTime or not. |
---|
507 | unsigned long labeltime = this->AdjustedRangeBuildTime; |
---|
508 | if (this->AdjustedRangeBuildTime > this->BuildTime) |
---|
509 | { |
---|
510 | for (i = 0; i < this->AdjustedNumberOfLabels; i++) |
---|
511 | { |
---|
512 | val = this->AdjustedRange[0] + i * interval; |
---|
513 | sprintf(string, this->LabelFormat, val); |
---|
514 | this->LabelMappers[i]->SetInput(string); |
---|
515 | |
---|
516 | // Check if the label text has changed |
---|
517 | |
---|
518 | if (this->LabelMappers[i]->GetMTime() > labeltime) |
---|
519 | { |
---|
520 | labeltime = this->LabelMappers[i]->GetMTime(); |
---|
521 | } |
---|
522 | } |
---|
523 | } |
---|
524 | |
---|
525 | // Copy prop and text prop eventually |
---|
526 | for (i = 0; i < this->AdjustedNumberOfLabels; i++) |
---|
527 | { |
---|
528 | this->LabelActors[i]->SetProperty(this->GetProperty()); |
---|
529 | if (this->LabelTextProperty->GetMTime() > this->BuildTime || |
---|
530 | this->AdjustedRangeBuildTime > this->BuildTime) |
---|
531 | { |
---|
532 | // Shallow copy here so that the size of the label prop is not |
---|
533 | // affected by the automatic adjustment of its text mapper's |
---|
534 | // size (i.e. its mapper's text property is identical except |
---|
535 | // for the font size which will be modified later). This |
---|
536 | // allows text actors to share the same text property, and in |
---|
537 | // that case specifically allows the title and label text prop |
---|
538 | // to be the same. |
---|
539 | this->LabelMappers[i]->GetTextProperty()->ShallowCopy( |
---|
540 | this->LabelTextProperty); |
---|
541 | } |
---|
542 | } |
---|
543 | |
---|
544 | // Resize the mappers if needed (i.e. viewport has changed, than |
---|
545 | // font size should be changed, or label text property has changed, |
---|
546 | // or some of the labels have changed (got bigger for example) |
---|
547 | if (positionsHaveChanged || viewportSizeHasChanged || |
---|
548 | this->LabelTextProperty->GetMTime() > this->BuildTime || |
---|
549 | labeltime > this->BuildTime) |
---|
550 | { |
---|
551 | if ( ! this->SizeFontRelativeToAxis ) |
---|
552 | { |
---|
553 | vtkTextMapper::SetMultipleRelativeFontSize(viewport, |
---|
554 | this->LabelMappers, |
---|
555 | this->AdjustedNumberOfLabels, |
---|
556 | size, |
---|
557 | this->LastMaxLabelSize, |
---|
558 | 0.015*this->FontFactor*this->LabelFactor); |
---|
559 | } |
---|
560 | else |
---|
561 | { |
---|
562 | int minFontSize=1000, fontSize, minLabel=0; |
---|
563 | for (i = 0; i < this->AdjustedNumberOfLabels; i++) |
---|
564 | { |
---|
565 | fontSize = this->LabelMappers[i]-> |
---|
566 | SetConstrainedFontSize(viewport, |
---|
567 | static_cast<int>((1.0/this->AdjustedNumberOfLabels)*len), |
---|
568 | static_cast<int>(0.2*len) ); |
---|
569 | if ( fontSize < minFontSize ) |
---|
570 | { |
---|
571 | minFontSize = fontSize; |
---|
572 | minLabel = i; |
---|
573 | } |
---|
574 | } |
---|
575 | for (i=0; i<this->AdjustedNumberOfLabels; i++) |
---|
576 | { |
---|
577 | this->LabelMappers[i]->GetTextProperty()->SetFontSize(minFontSize); |
---|
578 | } |
---|
579 | this->LabelMappers[minLabel]->GetSize(viewport,this->LastMaxLabelSize); |
---|
580 | } |
---|
581 | } |
---|
582 | |
---|
583 | // Position the mappers |
---|
584 | for (i = 0; i < this->AdjustedNumberOfLabels; i++) |
---|
585 | { |
---|
586 | pts->GetPoint((this->NumberOfMinorTicks+1) * 2 * i + 1, xTick); |
---|
587 | this->LabelMappers[i]->GetSize(viewport, stringSize); |
---|
588 | this->SetOffsetPosition(xTick, |
---|
589 | theta, |
---|
590 | this->LastMaxLabelSize[0], |
---|
591 | this->LastMaxLabelSize[1], |
---|
592 | this->TickOffset, |
---|
593 | this->LabelActors[i]); |
---|
594 | } |
---|
595 | } // If labels visible |
---|
596 | |
---|
597 | // Now build the title |
---|
598 | if (this->Title != NULL && this->Title[0] != 0 && this->TitleVisibility) |
---|
599 | { |
---|
600 | this->TitleMapper->SetInput(this->Title); |
---|
601 | |
---|
602 | if (this->TitleTextProperty->GetMTime() > this->BuildTime) |
---|
603 | { |
---|
604 | // Shallow copy here so that the size of the title prop is not |
---|
605 | // affected by the automatic adjustment of its text mapper's |
---|
606 | // size (i.e. its mapper's text property is identical except for |
---|
607 | // the font size which will be modified later). This allows text |
---|
608 | // actors to share the same text property, and in that case |
---|
609 | // specifically allows the title and label text prop to be the same. |
---|
610 | this->TitleMapper->GetTextProperty()->ShallowCopy( |
---|
611 | this->TitleTextProperty); |
---|
612 | } |
---|
613 | |
---|
614 | if (positionsHaveChanged || viewportSizeHasChanged || |
---|
615 | this->TitleTextProperty->GetMTime() > this->BuildTime) |
---|
616 | { |
---|
617 | if ( ! this->SizeFontRelativeToAxis ) |
---|
618 | { |
---|
619 | vtkTextMapper::SetRelativeFontSize(this->TitleMapper, viewport, size, stringSize, 0.015*this->FontFactor); |
---|
620 | } |
---|
621 | else |
---|
622 | { |
---|
623 | this->TitleMapper->SetConstrainedFontSize(viewport, |
---|
624 | static_cast<int>(0.33*len), |
---|
625 | static_cast<int>(0.2*len) ); |
---|
626 | this->TitleMapper->GetSize(viewport, stringSize); |
---|
627 | } |
---|
628 | } |
---|
629 | else |
---|
630 | { |
---|
631 | this->TitleMapper->GetSize(viewport, stringSize); |
---|
632 | } |
---|
633 | |
---|
634 | xTick[0] = p1[0] + (p2[0] - p1[0]) * this->TitlePosition; |
---|
635 | xTick[1] = p1[1] + (p2[1] - p1[1]) * this->TitlePosition; |
---|
636 | xTick[0] = xTick[0] + (this->TickLength + this->TickOffset) * sin(theta); |
---|
637 | xTick[1] = xTick[1] - (this->TickLength + this->TickOffset) * cos(theta); |
---|
638 | |
---|
639 | offset = 0.0; |
---|
640 | if (this->LabelVisibility) |
---|
641 | { |
---|
642 | offset = this->ComputeStringOffset(this->LastMaxLabelSize[0], |
---|
643 | this->LastMaxLabelSize[1], |
---|
644 | theta); |
---|
645 | } |
---|
646 | |
---|
647 | this->SetOffsetPosition(xTick, |
---|
648 | theta, |
---|
649 | stringSize[0], |
---|
650 | stringSize[1], |
---|
651 | static_cast<int>(offset), |
---|
652 | this->TitleActor); |
---|
653 | } // If title visible |
---|
654 | |
---|
655 | this->BuildTime.Modified(); |
---|
656 | } |
---|
657 | |
---|
658 | |
---|
659 | //---------------------------------------------------------------------------- |
---|
660 | void vtkRpAxisActor2D::UpdateAdjustedRange() |
---|
661 | { |
---|
662 | // Try not to update/adjust the range to often, do not update it |
---|
663 | // if the object has not been modified. |
---|
664 | // Nevertheless, try the following optimization: there is no need to |
---|
665 | // update the range if the position coordinate of this actor have |
---|
666 | // changed. But since vtkActor2D::GetMTime() includes the check for |
---|
667 | // both Position and Position2 coordinates, we will have to bypass |
---|
668 | // it. |
---|
669 | |
---|
670 | if (this->vtkActor2D::Superclass::GetMTime() <= this->AdjustedRangeBuildTime) |
---|
671 | { |
---|
672 | return; |
---|
673 | } |
---|
674 | |
---|
675 | if ( this->AdjustLabels ) |
---|
676 | { |
---|
677 | double interval; |
---|
678 | this->ComputeRange(this->Range, |
---|
679 | this->AdjustedRange, |
---|
680 | this->NumberOfLabels, |
---|
681 | this->AdjustedNumberOfLabels, |
---|
682 | interval); |
---|
683 | } |
---|
684 | else |
---|
685 | { |
---|
686 | this->AdjustedNumberOfLabels = this->NumberOfLabels; |
---|
687 | this->AdjustedRange[0] = this->Range[0]; |
---|
688 | this->AdjustedRange[1] = this->Range[1]; |
---|
689 | } |
---|
690 | this->AdjustedRangeBuildTime.Modified(); |
---|
691 | } |
---|
692 | |
---|
693 | // this is a helper function that computes some useful functions |
---|
694 | // for an axis. It returns the number of ticks |
---|
695 | int vtkRpAxisActor2DComputeTicks(double sRange[2], double &interval, |
---|
696 | double &root) |
---|
697 | { |
---|
698 | // first we try assuming the first value is reasonable |
---|
699 | int numTicks; |
---|
700 | double range = fabs(sRange[1]-sRange[0]); |
---|
701 | int rootPower = static_cast<int>(floor(log10(range)-1)); |
---|
702 | root = pow(10.0,rootPower); |
---|
703 | // val will be between 10 and 100 inclusive of 10 but not 100 |
---|
704 | double val = range/root; |
---|
705 | // first we check for an exact match |
---|
706 | for (numTicks = 5; numTicks < 9; ++numTicks) |
---|
707 | { |
---|
708 | if (fabs(val/(numTicks-1.0) - floor(val/(numTicks-1.0))) < .0001) |
---|
709 | { |
---|
710 | interval = val*root/(numTicks-1.0); |
---|
711 | return numTicks; |
---|
712 | } |
---|
713 | } |
---|
714 | |
---|
715 | // if there isn't an exact match find a reasonable value |
---|
716 | int newIntScale = 10; |
---|
717 | if (val > 10) |
---|
718 | { |
---|
719 | newIntScale = 12; |
---|
720 | } |
---|
721 | if (val > 12) |
---|
722 | { |
---|
723 | newIntScale = 15; |
---|
724 | } |
---|
725 | if (val > 15) |
---|
726 | { |
---|
727 | newIntScale = 18; |
---|
728 | } |
---|
729 | if (val > 18) |
---|
730 | { |
---|
731 | newIntScale = 20; |
---|
732 | } |
---|
733 | if (val > 20) |
---|
734 | { |
---|
735 | newIntScale = 25; |
---|
736 | } |
---|
737 | if (val > 25) |
---|
738 | { |
---|
739 | newIntScale = 30; |
---|
740 | } |
---|
741 | if (val > 30) |
---|
742 | { |
---|
743 | newIntScale = 40; |
---|
744 | } |
---|
745 | if (val > 40) |
---|
746 | { |
---|
747 | newIntScale = 50; |
---|
748 | } |
---|
749 | if (val > 50) |
---|
750 | { |
---|
751 | newIntScale = 60; |
---|
752 | } |
---|
753 | if (val > 60) |
---|
754 | { |
---|
755 | newIntScale = 70; |
---|
756 | } |
---|
757 | if (val > 70) |
---|
758 | { |
---|
759 | newIntScale = 80; |
---|
760 | } |
---|
761 | if (val > 80) |
---|
762 | { |
---|
763 | newIntScale = 90; |
---|
764 | } |
---|
765 | if (val > 90) |
---|
766 | { |
---|
767 | newIntScale = 100; |
---|
768 | } |
---|
769 | |
---|
770 | // how many ticks should we have |
---|
771 | switch (newIntScale) |
---|
772 | { |
---|
773 | case 12: |
---|
774 | case 20: |
---|
775 | case 40: |
---|
776 | case 80: |
---|
777 | numTicks = 5; |
---|
778 | break; |
---|
779 | case 18: |
---|
780 | case 30: |
---|
781 | case 60: |
---|
782 | case 90: |
---|
783 | numTicks = 7; |
---|
784 | break; |
---|
785 | case 10: |
---|
786 | case 15: |
---|
787 | case 25: |
---|
788 | case 50: |
---|
789 | case 100: |
---|
790 | numTicks = 6; |
---|
791 | break; |
---|
792 | case 70: |
---|
793 | numTicks = 8; |
---|
794 | break; |
---|
795 | } |
---|
796 | |
---|
797 | interval = newIntScale*root/(numTicks-1.0); |
---|
798 | return numTicks; |
---|
799 | } |
---|
800 | |
---|
801 | //---------------------------------------------------------------------------- |
---|
802 | //this method takes an initial range and an initial number of ticks and then |
---|
803 | //computes a final range and number of ticks so that two properties are |
---|
804 | //satisfied. First the final range includes at least the initial range, and |
---|
805 | //second the final range divided by the number of ticks (minus one) will be a |
---|
806 | //reasonable interval |
---|
807 | void vtkRpAxisActor2D::ComputeRange(double inRange[2], |
---|
808 | double outRange[2], |
---|
809 | int vtkNotUsed(inNumTicks), |
---|
810 | int &numTicks, |
---|
811 | double &interval) |
---|
812 | { |
---|
813 | // Handle the range |
---|
814 | double sRange[2]; |
---|
815 | if ( inRange[0] < inRange[1] ) |
---|
816 | { |
---|
817 | sRange[0] = inRange[0]; |
---|
818 | sRange[1] = inRange[1]; |
---|
819 | } |
---|
820 | else if ( inRange[0] > inRange[1] ) |
---|
821 | { |
---|
822 | sRange[1] = inRange[0]; |
---|
823 | sRange[0] = inRange[1]; |
---|
824 | } |
---|
825 | else // they're equal, so perturb them by 1 percent |
---|
826 | { |
---|
827 | double perturb = 100.; |
---|
828 | if (inRange[0] == 0.0) |
---|
829 | { // if they are both zero, then just perturb about zero |
---|
830 | sRange[0] = -1/perturb; |
---|
831 | sRange[1] = 1/perturb; |
---|
832 | } |
---|
833 | else |
---|
834 | { |
---|
835 | sRange[0] = inRange[0] - inRange[0]/perturb; |
---|
836 | sRange[1] = inRange[0] + inRange[0]/perturb; |
---|
837 | } |
---|
838 | } |
---|
839 | |
---|
840 | double root; |
---|
841 | numTicks = vtkRpAxisActor2DComputeTicks(sRange, interval, root); |
---|
842 | |
---|
843 | // is the starting point reasonable? |
---|
844 | if (fabs(sRange[0]/root - floor(sRange[0]/root)) < 0.01) |
---|
845 | { |
---|
846 | outRange[0] = sRange[0]; |
---|
847 | outRange[1] = outRange[0] + (numTicks-1.0)*interval; |
---|
848 | } |
---|
849 | else |
---|
850 | { |
---|
851 | // OK the starting point is not a good number, so we must widen the range |
---|
852 | // First see if the current range will handle moving the start point |
---|
853 | outRange[0] = floor(sRange[0]/root)*root; |
---|
854 | if (outRange[0]+(numTicks-1.0)*interval <= sRange[1]) |
---|
855 | { |
---|
856 | outRange[1] = outRange[0] + (numTicks-1.0)*interval; |
---|
857 | } |
---|
858 | else |
---|
859 | { |
---|
860 | // Finally in this case we must switch to a larger range to |
---|
861 | // have reasonable starting and ending values |
---|
862 | sRange[0] = outRange[0]; |
---|
863 | numTicks = vtkRpAxisActor2DComputeTicks(sRange, interval, root); |
---|
864 | outRange[1] = outRange[0] + (numTicks-1.0)*interval; |
---|
865 | } |
---|
866 | } |
---|
867 | |
---|
868 | // Adust if necessary |
---|
869 | if ( inRange[0] > inRange[1] ) |
---|
870 | { |
---|
871 | sRange[0] = outRange[1]; |
---|
872 | outRange[1] = outRange[0]; |
---|
873 | outRange[0] = sRange[0]; |
---|
874 | interval = -interval; |
---|
875 | } |
---|
876 | |
---|
877 | } |
---|
878 | |
---|
879 | //---------------------------------------------------------------------------- |
---|
880 | // Position text with respect to a point (xTick) where the angle of the line |
---|
881 | // from the point to the center of the text is given by theta. The offset |
---|
882 | // is the spacing between ticks and labels. |
---|
883 | void vtkRpAxisActor2D::SetOffsetPosition(double xTick[3], double theta, |
---|
884 | int stringWidth, int stringHeight, |
---|
885 | int offset, vtkActor2D *actor) |
---|
886 | { |
---|
887 | double x, y, center[2]; |
---|
888 | int pos[2]; |
---|
889 | |
---|
890 | x = stringWidth/2.0 + offset; |
---|
891 | y = stringHeight/2.0 + offset; |
---|
892 | |
---|
893 | center[0] = xTick[0] + x*sin(theta); |
---|
894 | center[1] = xTick[1] - y*cos(theta); |
---|
895 | |
---|
896 | pos[0] = static_cast<int>(center[0] - stringWidth/2.0); |
---|
897 | pos[1] = static_cast<int>(center[1] - stringHeight/2.0); |
---|
898 | |
---|
899 | actor->SetPosition(pos[0], pos[1]); |
---|
900 | } |
---|
901 | |
---|
902 | //---------------------------------------------------------------------------- |
---|
903 | double vtkRpAxisActor2D::ComputeStringOffset(double width, double height, |
---|
904 | double theta) |
---|
905 | { |
---|
906 | double f1 = height*cos(theta); |
---|
907 | double f2 = width*sin(theta); |
---|
908 | return (1.2 * sqrt(f1*f1 + f2*f2)); |
---|
909 | } |
---|
910 | |
---|
911 | //---------------------------------------------------------------------------- |
---|
912 | void vtkRpAxisActor2D::ShallowCopy(vtkProp *prop) |
---|
913 | { |
---|
914 | vtkRpAxisActor2D *a = vtkRpAxisActor2D::SafeDownCast(prop); |
---|
915 | if ( a != NULL ) |
---|
916 | { |
---|
917 | this->SetRange(a->GetRange()); |
---|
918 | this->SetNumberOfLabels(a->GetNumberOfLabels()); |
---|
919 | this->SetLabelFormat(a->GetLabelFormat()); |
---|
920 | this->SetAdjustLabels(a->GetAdjustLabels()); |
---|
921 | this->SetTitle(a->GetTitle()); |
---|
922 | this->SetTickLength(a->GetTickLength()); |
---|
923 | this->SetTickOffset(a->GetTickOffset()); |
---|
924 | this->SetAxisVisibility(a->GetAxisVisibility()); |
---|
925 | this->SetTickVisibility(a->GetTickVisibility()); |
---|
926 | this->SetLabelVisibility(a->GetLabelVisibility()); |
---|
927 | this->SetTitleVisibility(a->GetTitleVisibility()); |
---|
928 | this->SetFontFactor(a->GetFontFactor()); |
---|
929 | this->SetLabelFactor(a->GetLabelFactor()); |
---|
930 | this->SetLabelTextProperty(a->GetLabelTextProperty()); |
---|
931 | this->SetTitleTextProperty(a->GetTitleTextProperty()); |
---|
932 | } |
---|
933 | |
---|
934 | // Now do superclass |
---|
935 | this->vtkActor2D::ShallowCopy(prop); |
---|
936 | } |
---|