1 | # ---------------------------------------------------------------------- |
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2 | # COMPONENT: imageresult - picture image in a ResultSet |
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3 | # |
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4 | # This widget displays an image found in the output of a Rappture |
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5 | # tool run. Use the "add" and "delete" methods to control the images |
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6 | # showing in the widget. |
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7 | # ====================================================================== |
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8 | # AUTHOR: Michael McLennan, Purdue University |
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9 | # Copyright (c) 2004-2005 Purdue Research Foundation |
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10 | # |
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11 | # See the file "license.terms" for information on usage and |
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12 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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13 | # ====================================================================== |
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14 | package require Itk |
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15 | package require BLT |
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16 | package require Img |
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17 | |
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18 | option add *ImageResult.width 3i widgetDefault |
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19 | option add *ImageResult.height 3i widgetDefault |
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20 | option add *ImageResult.controlBackground gray widgetDefault |
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21 | option add *ImageResult.font \ |
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22 | -*-helvetica-medium-r-normal-*-12-* widgetDefault |
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23 | |
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24 | itcl::class Rappture::ImageResult { |
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25 | inherit itk::Widget |
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26 | |
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27 | constructor {args} { # defined below } |
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28 | destructor { # defined below } |
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29 | |
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30 | public method add {image {settings ""}} |
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31 | public method get {} |
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32 | public method delete {args} |
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33 | public method scale {args} |
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34 | public method parameters {title args} { # do nothing } |
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35 | public method download {option args} |
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36 | |
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37 | protected method _rebuild {args} |
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38 | protected method _top {what} |
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39 | protected method _zoom {option args} |
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40 | protected method _move {option args} |
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41 | |
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42 | private variable _dispatcher "" ;# dispatcher for !events |
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43 | private variable _dlist "" ;# list of data objects |
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44 | private variable _topmost "" ;# topmost image in _dlist |
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45 | private variable _max ;# max size of all images |
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46 | private variable _scale ;# info related to zoom |
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47 | private variable _image ;# image buffers used for scaling |
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48 | } |
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49 | |
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50 | itk::usual ImageResult { |
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51 | keep -background -foreground -cursor -font |
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52 | } |
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53 | |
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54 | # ---------------------------------------------------------------------- |
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55 | # CONSTRUCTOR |
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56 | # ---------------------------------------------------------------------- |
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57 | itcl::body Rappture::ImageResult::constructor {args} { |
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58 | Rappture::dispatcher _dispatcher |
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59 | $_dispatcher register !rebuild |
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60 | $_dispatcher dispatch $this !rebuild [itcl::code $this _rebuild] |
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61 | |
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62 | array set _scale { |
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63 | max 1.0 |
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64 | current 1.0 |
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65 | default 1 |
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66 | x 0 |
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67 | y 0 |
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68 | } |
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69 | |
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70 | option add hull.width hull.height |
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71 | pack propagate $itk_component(hull) no |
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72 | |
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73 | Rappture::Panes $itk_interior.panes -sashwidth 1 -sashrelief solid -sashpadding 2 |
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74 | pack $itk_interior.panes -expand yes -fill both |
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75 | set main [$itk_interior.panes pane 0] |
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76 | $itk_interior.panes fraction 0 1 |
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77 | |
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78 | itk_component add controls { |
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79 | frame $main.cntls |
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80 | } { |
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81 | usual |
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82 | rename -background -controlbackground controlBackground Background |
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83 | } |
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84 | pack $itk_component(controls) -side right -fill y |
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85 | |
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86 | itk_component add reset { |
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87 | button $itk_component(controls).reset \ |
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88 | -borderwidth 1 -padx 1 -pady 1 \ |
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89 | -bitmap [Rappture::icon reset] \ |
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90 | -command [itcl::code $this _zoom reset] |
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91 | } { |
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92 | usual |
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93 | ignore -borderwidth |
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94 | rename -highlightbackground -controlbackground controlBackground Background |
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95 | } |
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96 | pack $itk_component(reset) -padx 4 -pady 4 |
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97 | Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level" |
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98 | |
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99 | itk_component add zoomin { |
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100 | button $itk_component(controls).zin \ |
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101 | -borderwidth 1 -padx 1 -pady 1 \ |
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102 | -bitmap [Rappture::icon zoomin] \ |
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103 | -command [itcl::code $this _zoom in] |
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104 | } { |
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105 | usual |
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106 | ignore -borderwidth |
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107 | rename -highlightbackground -controlbackground controlBackground Background |
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108 | } |
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109 | pack $itk_component(zoomin) -padx 4 -pady 4 |
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110 | Rappture::Tooltip::for $itk_component(zoomin) "Zoom in" |
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111 | |
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112 | itk_component add zoomout { |
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113 | button $itk_component(controls).zout \ |
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114 | -borderwidth 1 -padx 1 -pady 1 \ |
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115 | -bitmap [Rappture::icon zoomout] \ |
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116 | -command [itcl::code $this _zoom out] |
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117 | } { |
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118 | usual |
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119 | ignore -borderwidth |
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120 | rename -highlightbackground -controlbackground controlBackground Background |
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121 | } |
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122 | pack $itk_component(zoomout) -padx 4 -pady 4 |
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123 | Rappture::Tooltip::for $itk_component(zoomout) "Zoom out" |
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124 | |
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125 | |
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126 | set _image(zoom) [image create photo] |
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127 | set _image(final) [image create photo] |
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128 | |
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129 | itk_component add image { |
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130 | label $main.image -image $_image(final) -anchor c |
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131 | } { |
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132 | keep -background -foreground -cursor -font |
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133 | } |
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134 | pack $itk_component(image) -expand yes -fill both |
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135 | |
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136 | # |
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137 | # Add bindings for resize/move |
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138 | # |
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139 | bind $itk_component(image) <Configure> \ |
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140 | [list $_dispatcher event -idle !rebuild resize 1] |
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141 | |
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142 | bind $itk_component(image) <ButtonPress-1> \ |
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143 | [itcl::code $this _move click %x %y] |
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144 | bind $itk_component(image) <B1-Motion> \ |
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145 | [itcl::code $this _move drag %x %y] |
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146 | bind $itk_component(image) <ButtonRelease-1> \ |
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147 | [itcl::code $this _move release %x %y] |
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148 | |
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149 | # |
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150 | # Add area at the bottom for notes. |
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151 | # |
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152 | set notes [$itk_interior.panes insert end -fraction 0.15] |
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153 | $itk_interior.panes visibility 1 off |
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154 | Rappture::Scroller $notes.scr -xscrollmode auto -yscrollmode auto |
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155 | pack $notes.scr -expand yes -fill both |
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156 | itk_component add notes { |
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157 | Rappture::HTMLviewer $notes.scr.html |
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158 | } |
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159 | $notes.scr contents $notes.scr.html |
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160 | |
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161 | eval itk_initialize $args |
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162 | } |
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163 | |
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164 | # ---------------------------------------------------------------------- |
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165 | # DESTRUCTOR |
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166 | # ---------------------------------------------------------------------- |
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167 | itcl::body Rappture::ImageResult::destructor {} { |
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168 | foreach name [array names _image] { |
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169 | image delete $_image($name) |
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170 | } |
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171 | } |
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172 | |
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173 | # ---------------------------------------------------------------------- |
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174 | # USAGE: add <image> ?<settings>? |
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175 | # |
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176 | # Clients use this to add an image to the plot. The optional <settings> |
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177 | # are used to configure the image. Allowed settings are -color, |
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178 | # -brightness, -width, -linestyle and -raise. |
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179 | # ---------------------------------------------------------------------- |
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180 | itcl::body Rappture::ImageResult::add {image {settings ""}} { |
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181 | array set params { |
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182 | -color auto |
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183 | -brightness 0 |
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184 | -width 1 |
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185 | -raise 0 |
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186 | -linestyle solid |
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187 | -description "" |
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188 | -param "" |
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189 | } |
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190 | foreach {opt val} $settings { |
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191 | if {![info exists params($opt)]} { |
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192 | error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]" |
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193 | } |
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194 | set params($opt) $val |
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195 | } |
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196 | |
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197 | if {$params(-raise)} { |
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198 | set _topmost $image |
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199 | $_dispatcher event -idle !rebuild |
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200 | } |
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201 | |
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202 | set pos [lsearch -exact $image $_dlist] |
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203 | if {$pos < 0} { |
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204 | lappend _dlist $image |
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205 | $_dispatcher event -idle !rebuild |
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206 | } |
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207 | } |
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208 | |
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209 | # ---------------------------------------------------------------------- |
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210 | # USAGE: get |
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211 | # |
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212 | # Clients use this to query the list of images being displayed, in |
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213 | # order from bottom to top of this result. |
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214 | # ---------------------------------------------------------------------- |
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215 | itcl::body Rappture::ImageResult::get {} { |
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216 | # put the dataobj list in order according to -raise options |
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217 | set dlist $_dlist |
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218 | |
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219 | set i [lsearch $_dlist $_topmost] |
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220 | if {$i >= 0} { |
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221 | set dlist [lreplace $dlist $i $i] |
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222 | set dlist [linsert $dlist 0 $_topmost] |
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223 | } |
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224 | return $dlist |
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225 | } |
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226 | |
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227 | # ---------------------------------------------------------------------- |
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228 | # USAGE: delete ?<image1> <image2> ...? |
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229 | # |
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230 | # Clients use this to delete an image from the plot. If no images |
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231 | # are specified, then all images are deleted. |
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232 | # ---------------------------------------------------------------------- |
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233 | itcl::body Rappture::ImageResult::delete {args} { |
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234 | if {[llength $args] == 0} { |
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235 | set args $_dlist |
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236 | } |
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237 | |
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238 | # delete all specified curves |
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239 | set changed 0 |
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240 | foreach image $args { |
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241 | set pos [lsearch -exact $_dlist $image] |
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242 | if {$pos >= 0} { |
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243 | set _dlist [lreplace $_dlist $pos $pos] |
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244 | set changed 1 |
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245 | |
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246 | if {$image == $_topmost} { |
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247 | set _topmost "" |
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248 | } |
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249 | } |
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250 | } |
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251 | |
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252 | # if anything changed, then rebuild the plot |
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253 | if {$changed} { |
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254 | $_dispatcher event -idle !rebuild |
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255 | } |
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256 | } |
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257 | |
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258 | # ---------------------------------------------------------------------- |
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259 | # USAGE: scale ?<image1> <image2> ...? |
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260 | # |
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261 | # Sets the default limits for the overall plot according to the |
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262 | # limits of the data for all of the given <image> objects. This |
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263 | # accounts for all images--even those not showing on the screen. |
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264 | # Because of this, the limits are appropriate for all images as |
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265 | # the user scans through data in the ResultSet viewer. |
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266 | # ---------------------------------------------------------------------- |
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267 | itcl::body Rappture::ImageResult::scale {args} { |
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268 | set _max(w) 0 |
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269 | set _max(h) 0 |
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270 | foreach image $args { |
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271 | set imh [$image tkimage] |
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272 | |
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273 | set w [image width $imh] |
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274 | if {$w > $_max(w)} { set _max(w) $w } |
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275 | |
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276 | set h [image height $imh] |
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277 | if {$h > $_max(h)} { set _max(h) $h } |
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278 | } |
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279 | |
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280 | # scale is unknown for now... scale later at next _rebuild |
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281 | set _scale(max) "?" |
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282 | set _scale(current) "?" |
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283 | |
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284 | $_dispatcher event -idle !rebuild |
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285 | } |
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286 | |
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287 | # ---------------------------------------------------------------------- |
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288 | # USAGE: download coming |
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289 | # USAGE: download controls <downloadCommand> |
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290 | # USAGE: download now |
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291 | # |
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292 | # Clients use this method to create a downloadable representation |
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293 | # of the plot. Returns a list of the form {ext string}, where |
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294 | # "ext" is the file extension (indicating the type of data) and |
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295 | # "string" is the data itself. |
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296 | # ---------------------------------------------------------------------- |
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297 | itcl::body Rappture::ImageResult::download {option args} { |
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298 | switch $option { |
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299 | coming { |
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300 | # nothing to do |
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301 | } |
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302 | controls { |
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303 | # no controls for this download yet |
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304 | return "" |
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305 | } |
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306 | now { |
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307 | set top [_top image] |
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308 | if {$top == ""} { |
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309 | return "" |
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310 | } |
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311 | # Get the image data (as base64) and decode it back to binary. |
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312 | # This is better than writing to temporary files. When we switch |
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313 | # to the BLT picture image it won't be necessary to decode the |
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314 | # image data. |
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315 | set bytes [$top data -format "jpeg -quality 100"] |
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316 | set bytes [Rappture::encoding::decode -as b64 $bytes] |
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317 | return [list .jpg $bytes] |
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318 | } |
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319 | default { |
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320 | error "bad option \"$option\": should be coming, controls, now" |
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321 | } |
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322 | } |
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323 | } |
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324 | |
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325 | # ---------------------------------------------------------------------- |
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326 | # USAGE: _rebuild ?<eventData>...? |
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327 | # |
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328 | # Called automatically whenever something changes that affects the |
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329 | # data in the widget. Clears any existing data and rebuilds the |
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330 | # widget to display new data. |
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331 | # ---------------------------------------------------------------------- |
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332 | itcl::body Rappture::ImageResult::_rebuild {args} { |
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333 | array set event $args |
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334 | if {[info exists event(resize)] && $event(resize)} { |
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335 | # window changed size -- recompute max scale below |
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336 | set _scale(max) "?" |
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337 | } |
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338 | |
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339 | if {$_scale(max) == "?"} { |
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340 | if {![_zoom rescale]} { |
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341 | return |
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342 | } |
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343 | } |
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344 | if {$_scale(current) == "?" || $_scale(default)} { |
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345 | set _scale(current) $_scale(max) |
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346 | set _scale(x) 0 |
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347 | set _scale(y) 0 |
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348 | } |
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349 | |
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350 | set w [winfo width $itk_component(image)] |
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351 | set h [winfo height $itk_component(image)] |
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352 | $_image(final) configure -width $w -height $h |
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353 | set bg [$itk_component(image) cget -background] |
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354 | set rgb [winfo rgb . $bg] |
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355 | set bg [format "#%03x%03x%03x" [lindex $rgb 0] [lindex $rgb 1] [lindex $rgb 2]] |
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356 | $_image(final) put $bg -to 0 0 $w $h |
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357 | |
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358 | set imh [_top image] |
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359 | if {$imh != ""} { |
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360 | if {$_scale(current) <= 1.0} { |
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361 | set wz [expr {round($_scale(current)*$w)}] |
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362 | set hz [expr {round($_scale(current)*$h)}] |
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363 | if {$wz > 1 && $hz > 1} { |
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364 | $_image(zoom) configure -width $wz -height $hz |
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365 | $_image(zoom) put $bg -to 0 0 $wz $hz |
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366 | set sx [expr {round($_scale(x)*$_scale(current))}] |
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367 | set sy [expr {round($_scale(y)*$_scale(current))}] |
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368 | $_image(zoom) copy $imh -from $sx $sy |
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369 | blt::winop resample $_image(zoom) $_image(final) sinc |
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370 | } |
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371 | } else { |
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372 | set iw [image width $imh] |
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373 | set ih [image height $imh] |
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374 | set wz [expr {round(double($iw)/$_scale(current))}] |
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375 | set hz [expr {round(double($ih)/$_scale(current))}] |
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376 | if {$wz > 1 && $hz > 1} { |
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377 | $_image(zoom) configure -width $wz -height $hz |
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378 | $_image(zoom) put $bg -to 0 0 $wz $hz |
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379 | blt::winop resample $imh $_image(zoom) sinc |
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380 | $_image(final) copy $_image(zoom) -from $_scale(x) $_scale(y) |
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381 | } |
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382 | } |
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383 | } |
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384 | |
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385 | set note [_top note] |
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386 | if {[string length $note] > 0} { |
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387 | if {[regexp {^html://} $note]} { |
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388 | set note [string range $note 7 end] |
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389 | } else { |
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390 | regexp {&} $note {\007} note |
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391 | regexp {<} $note {\<} note |
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392 | regexp {>} $note {\>} note |
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393 | regexp {\007} $note {\&} note |
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394 | regexp "\n\n" $note {<br/>} note |
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395 | set note "<html><body>$note</body></html>" |
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396 | } |
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397 | set notes [$itk_interior.panes pane 1] |
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398 | $itk_component(notes) load $note -in [file join [_top tooldir] docs] |
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399 | $itk_interior.panes visibility 1 on |
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400 | } else { |
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401 | $itk_interior.panes visibility 1 off |
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402 | } |
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403 | } |
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404 | |
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405 | # ---------------------------------------------------------------------- |
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406 | # USAGE: _top image|note|tooldir |
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407 | # |
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408 | # Used internally to get the topmost image currently being displayed. |
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409 | # ---------------------------------------------------------------------- |
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410 | itcl::body Rappture::ImageResult::_top {option} { |
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411 | set top $_topmost |
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412 | if {"" == $top} { |
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413 | set top [lindex $_dlist 0] |
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414 | } |
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415 | if {"" != $top} { |
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416 | switch -- $option { |
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417 | image { return [$top tkimage] } |
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418 | note { return [$top hints note] } |
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419 | tooldir { return [$top hints tooldir] } |
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420 | default { error "bad option \"$option\": should be image, note, tooldir" } |
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421 | } |
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422 | } |
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423 | return "" |
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424 | } |
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425 | |
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426 | # ---------------------------------------------------------------------- |
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427 | # USAGE: _zoom reset |
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428 | # USAGE: _zoom in |
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429 | # USAGE: _zoom out |
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430 | # |
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431 | # Called automatically when the user clicks on one of the zoom |
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432 | # controls for this widget. Changes the zoom for the current view. |
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433 | # ---------------------------------------------------------------------- |
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434 | itcl::body Rappture::ImageResult::_zoom {option args} { |
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435 | switch -- $option { |
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436 | rescale { |
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437 | # empty list? then reset w/h max size |
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438 | if {[llength $_dlist] == 0} { |
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439 | set _max(w) 0 |
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440 | set _max(h) 0 |
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441 | set _scale(max) 1.0 |
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442 | } else { |
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443 | set w [winfo width $itk_component(image)] |
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444 | set h [winfo height $itk_component(image)] |
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445 | if {$w == 1 && $h == 1} { |
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446 | return 0 |
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447 | } |
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448 | |
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449 | set wfac [expr {$_max(w)/double($w)}] |
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450 | set hfac [expr {$_max(h)/double($h)}] |
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451 | set _scale(max) [expr {($wfac > $hfac) ? $wfac : $hfac}] |
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452 | } |
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453 | return 1 |
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454 | } |
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455 | reset { |
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456 | set _scale(current) $_scale(max) |
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457 | set _scale(default) 1 |
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458 | set _scale(x) 0 |
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459 | set _scale(y) 0 |
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460 | } |
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461 | in { |
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462 | set _scale(current) [expr {$_scale(current)*0.5}] |
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463 | set _scale(default) 0 |
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464 | } |
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465 | out { |
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466 | set w [winfo width $itk_component(image)] |
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467 | set h [winfo height $itk_component(image)] |
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468 | if {$_max(w)/$_scale(current) > $w |
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469 | || $_max(h)/$_scale(current) > $h} { |
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470 | # must be room left to zoom -- zoom out, but not beyond max |
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471 | set _scale(current) [expr {$_scale(current)*2.0}] |
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472 | if {$_scale(current) < $_scale(max)} { |
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473 | set _scale(current) $_scale(max) |
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474 | } |
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475 | } else { |
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476 | # no room left to zoom -- zoom out max |
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477 | if {$_scale(max) < 1} { |
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478 | set _scale(current) 1 |
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479 | } else { |
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480 | set _scale(current) $_scale(max) |
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481 | } |
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482 | } |
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483 | set _scale(default) 0 |
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484 | } |
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485 | } |
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486 | $_dispatcher event -idle !rebuild |
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487 | } |
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488 | |
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489 | # ---------------------------------------------------------------------- |
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490 | # USAGE: _move click <x> <y> |
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491 | # USAGE: _move drag <x> <y> |
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492 | # USAGE: _move release <x> <y> |
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493 | # |
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494 | # Called automatically when the user clicks and drags on the image |
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495 | # to pan the view. Adjusts the (x,y) offset for the scaling info |
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496 | # and redraws the widget. |
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497 | # ---------------------------------------------------------------------- |
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498 | itcl::body Rappture::ImageResult::_move {option args} { |
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499 | switch -- $option { |
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500 | click { |
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501 | foreach {x y} $args break |
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502 | $itk_component(image) configure -cursor fleur |
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503 | set _scale(x0) $_scale(x) |
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504 | set _scale(y0) $_scale(y) |
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505 | set _scale(xclick) $x |
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506 | set _scale(yclick) $y |
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507 | } |
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508 | drag { |
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509 | foreach {x y} $args break |
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510 | if {[info exists _scale(xclick)] && [info exists _scale(yclick)]} { |
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511 | set w [winfo width $itk_component(image)] |
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512 | set h [winfo height $itk_component(image)] |
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513 | set wx [expr {round($_max(w)/$_scale(current))}] |
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514 | set hy [expr {round($_max(h)/$_scale(current))}] |
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515 | if {$wx > $w || $hy > $h} { |
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516 | set x [expr {$_scale(x0)-$x+$_scale(xclick)}] |
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517 | if {$x > $wx-$w} {set x [expr {$wx-$w}]} |
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518 | if {$x < 0} {set x 0} |
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519 | |
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520 | set y [expr {$_scale(y0)-$y+$_scale(yclick)}] |
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521 | if {$y > $hy-$h} {set y [expr {$hy-$h}]} |
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522 | if {$y < 0} {set y 0} |
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523 | |
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524 | set _scale(x) $x |
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525 | set _scale(y) $y |
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526 | } else { |
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527 | set _scale(x) 0 |
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528 | set _scale(y) 0 |
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529 | } |
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530 | $_dispatcher event -idle !rebuild |
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531 | } |
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532 | } |
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533 | release { |
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534 | eval _move drag $args |
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535 | $itk_component(image) configure -cursor "" |
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536 | catch {unset _scale(xclick)} |
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537 | catch {unset _scale(yclick)} |
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538 | } |
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539 | default { |
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540 | error "bad option \"$option\": should be click, drag, release" |
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541 | } |
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542 | } |
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543 | } |
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