1 | # ---------------------------------------------------------------------- |
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2 | # COMPONENT: xyresult - X/Y plot in a ResultSet |
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3 | # |
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4 | # This widget is an X/Y plot, meant to view line graphs produced |
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5 | # as output from the run of a Rappture tool. Use the "add" and |
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6 | # "delete" methods to control the curves showing on the plot. |
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7 | # ====================================================================== |
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8 | # AUTHOR: Michael McLennan, Purdue University |
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9 | # Copyright (c) 2004-2005 |
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10 | # Purdue Research Foundation, West Lafayette, IN |
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11 | # ====================================================================== |
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12 | package require Itk |
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13 | package require BLT |
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14 | |
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15 | option add *XyResult.width 4i widgetDefault |
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16 | option add *XyResult.height 4i widgetDefault |
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17 | option add *XyResult.gridColor #d9d9d9 widgetDefault |
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18 | option add *XyResult.font \ |
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19 | -*-helvetica-medium-r-normal-*-*-120-* widgetDefault |
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20 | |
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21 | itcl::class Rappture::XyResult { |
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22 | inherit itk::Widget |
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23 | |
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24 | itk_option define -gridcolor gridColor GridColor "" |
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25 | |
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26 | constructor {args} { # defined below } |
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27 | destructor { # defined below } |
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28 | |
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29 | public method add {curve {settings ""}} |
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30 | public method delete {args} |
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31 | public method scale {args} |
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32 | |
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33 | protected method _rebuild {} |
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34 | protected method _fixLimits {} |
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35 | |
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36 | private variable _clist "" ;# list of curve objects |
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37 | private variable _curve2color ;# maps curve => plotting color |
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38 | private variable _curve2width ;# maps curve => line width |
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39 | private variable _curve2raise ;# maps curve => raise flag 0/1 |
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40 | private variable _curve2elems ;# maps curve => elements on graph |
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41 | private variable _xmin "" ;# autoscale min for x-axis |
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42 | private variable _xmax "" ;# autoscale max for x-axis |
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43 | private variable _ymin "" ;# autoscale min for y-axis |
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44 | private variable _ymax "" ;# autoscale max for y-axis |
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45 | } |
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46 | |
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47 | itk::usual XyResult { |
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48 | keep -background -foreground -cursor -font |
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49 | } |
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50 | |
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51 | # ---------------------------------------------------------------------- |
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52 | # CONSTRUCTOR |
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53 | # ---------------------------------------------------------------------- |
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54 | itcl::body Rappture::XyResult::constructor {args} { |
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55 | option add hull.width hull.height |
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56 | pack propagate $itk_component(hull) no |
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57 | |
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58 | itk_component add plot { |
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59 | blt::graph $itk_interior.plot \ |
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60 | -highlightthickness 0 -plotpadx 0 -plotpady 0 \ |
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61 | -rightmargin 10 |
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62 | } { |
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63 | keep -background -foreground -cursor -font |
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64 | } |
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65 | pack $itk_component(plot) -expand yes -fill both |
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66 | |
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67 | Blt_ZoomStack $itk_component(plot) |
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68 | $itk_component(plot) legend configure -hide yes |
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69 | |
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70 | eval itk_initialize $args |
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71 | } |
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72 | |
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73 | # ---------------------------------------------------------------------- |
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74 | # DESTRUCTOR |
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75 | # ---------------------------------------------------------------------- |
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76 | itcl::body Rappture::XyResult::destructor {} { |
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77 | } |
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78 | |
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79 | # ---------------------------------------------------------------------- |
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80 | # USAGE: add <curve> ?<settings>? |
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81 | # |
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82 | # Clients use this to add a curve to the plot. The optional <settings> |
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83 | # are used to configure the plot. Allowed settings are -color, -width, |
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84 | # and -raise. |
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85 | # ---------------------------------------------------------------------- |
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86 | itcl::body Rappture::XyResult::add {curve {settings ""}} { |
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87 | array set params { |
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88 | -color black |
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89 | -width 1 |
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90 | -raise 0 |
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91 | } |
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92 | foreach {opt val} $settings { |
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93 | if {![info exists params($opt)]} { |
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94 | error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]" |
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95 | } |
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96 | set params($opt) $val |
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97 | } |
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98 | |
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99 | set pos [lsearch -exact $curve $_clist] |
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100 | if {$pos < 0} { |
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101 | lappend _clist $curve |
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102 | set _curve2color($curve) $params(-color) |
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103 | set _curve2width($curve) $params(-width) |
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104 | set _curve2raise($curve) $params(-raise) |
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105 | |
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106 | after cancel [itcl::code $this _rebuild] |
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107 | after idle [itcl::code $this _rebuild] |
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108 | } |
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109 | } |
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110 | |
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111 | # ---------------------------------------------------------------------- |
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112 | # USAGE: delete ?<curve1> <curve2> ...? |
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113 | # |
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114 | # Clients use this to delete a curve from the plot. If no curves |
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115 | # are specified, then all curves are deleted. |
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116 | # ---------------------------------------------------------------------- |
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117 | itcl::body Rappture::XyResult::delete {args} { |
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118 | if {[llength $args] == 0} { |
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119 | set args $_clist |
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120 | } |
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121 | |
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122 | # delete all specified curves |
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123 | set changed 0 |
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124 | foreach curve $args { |
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125 | set pos [lsearch -exact $_clist $curve] |
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126 | if {$pos >= 0} { |
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127 | set _clist [lreplace $_clist $pos $pos] |
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128 | catch {unset _curve2color($curve)} |
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129 | catch {unset _curve2width($curve)} |
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130 | catch {unset _curve2raise($curve)} |
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131 | catch {unset _curve2elems($curve)} |
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132 | set changed 1 |
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133 | } |
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134 | } |
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135 | |
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136 | # if anything changed, then rebuild the plot |
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137 | if {$changed} { |
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138 | after cancel [itcl::code $this _rebuild] |
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139 | after idle [itcl::code $this _rebuild] |
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140 | } |
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141 | } |
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142 | |
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143 | # ---------------------------------------------------------------------- |
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144 | # USAGE: scale ?<curve1> <curve2> ...? |
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145 | # |
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146 | # Sets the default limits for the overall plot according to the |
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147 | # limits of the data for all of the given <curve> objects. This |
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148 | # accounts for all curves--even those not showing on the screen. |
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149 | # Because of this, the limits are appropriate for all curves as |
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150 | # the user scans through data in the ResultSet viewer. |
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151 | # ---------------------------------------------------------------------- |
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152 | itcl::body Rappture::XyResult::scale {args} { |
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153 | set _xmin "" |
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154 | set _xmax "" |
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155 | set _ymin "" |
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156 | set _ymax "" |
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157 | foreach obj $args { |
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158 | foreach axis {x y} { |
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159 | foreach {min max} [$obj limits $axis] break |
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160 | if {"" != $min && "" != $max} { |
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161 | if {"" == [set _${axis}min]} { |
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162 | set _${axis}min $min |
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163 | set _${axis}max $max |
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164 | } else { |
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165 | if {$min < [set _${axis}min]} { |
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166 | set _${axis}min $min |
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167 | } |
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168 | if {$max > [set _${axis}max]} { |
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169 | set _${axis}max $max |
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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 | } |
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175 | _fixLimits |
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176 | } |
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177 | |
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178 | # ---------------------------------------------------------------------- |
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179 | # USAGE: _rebuild |
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180 | # |
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181 | # Called automatically whenever something changes that affects the |
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182 | # data in the widget. Clears any existing data and rebuilds the |
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183 | # widget to display new data. |
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184 | # ---------------------------------------------------------------------- |
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185 | itcl::body Rappture::XyResult::_rebuild {} { |
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186 | set g $itk_component(plot) |
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187 | |
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188 | # first clear out the widget |
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189 | eval $g element delete [$g element names] |
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190 | $g axis configure y -min "" -max "" |
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191 | |
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192 | # extract axis information from the first curve |
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193 | set xydata [lindex $_clist 0] |
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194 | if {$xydata != ""} { |
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195 | set title [$xydata hints label] |
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196 | if {"" != $title} { |
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197 | $g configure -title $title |
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198 | } |
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199 | |
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200 | set legend [$xydata hints legend] |
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201 | if {"" != $legend} { |
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202 | if {$legend == "off"} { |
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203 | $g legend configure -hide yes |
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204 | } else { |
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205 | $g legend configure -hide no \ |
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206 | -position plotarea -anchor $legend -borderwidth 0 |
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207 | } |
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208 | } |
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209 | |
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210 | set xlabel [$xydata hints xlabel] |
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211 | if {"" != $xlabel} { |
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212 | $g xaxis configure -title $xlabel |
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213 | } |
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214 | |
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215 | set ylabel [$xydata hints ylabel] |
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216 | if {"" != $ylabel} { |
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217 | $g yaxis configure -title $ylabel |
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218 | } |
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219 | } |
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220 | |
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221 | # plot all of the curves |
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222 | set count 0 |
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223 | foreach xydata $_clist { |
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224 | set _curve2elems($xydata) "" |
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225 | |
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226 | foreach comp [$xydata components] { |
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227 | set xv [$xydata mesh $comp] |
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228 | set yv [$xydata values $comp] |
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229 | |
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230 | if {[info exists _curve2color($xydata)]} { |
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231 | set color $_curve2color($xydata) |
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232 | } else { |
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233 | set color [$xydata hints color] |
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234 | if {"" == $color} { |
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235 | set color black |
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236 | } |
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237 | } |
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238 | |
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239 | if {[info exists _curve2width($xydata)]} { |
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240 | set lwidth $_curve2width($xydata) |
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241 | } else { |
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242 | set lwidth 2 |
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243 | } |
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244 | |
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245 | set elem "elem[incr count]" |
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246 | lappend _curve2elems($xydata) $elem |
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247 | |
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248 | set label [$xydata hints label] |
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249 | $g element create $elem -x $xv -y $yv \ |
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250 | -symbol "" -linewidth $lwidth -label $label -color $color |
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251 | |
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252 | set style [$xydata hints style] |
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253 | if {$style != ""} { |
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254 | eval $g element configure $elem $style |
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255 | } |
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256 | } |
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257 | } |
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258 | |
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259 | # raise those tagged to be on top |
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260 | set dlist [$g element show] |
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261 | foreach xydata $_clist { |
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262 | if {[info exists _curve2raise($xydata)] && $_curve2raise($xydata)} { |
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263 | foreach elem $_curve2elems($xydata) { |
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264 | set i [lsearch -exact $dlist $elem] |
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265 | if {$i >= 0} { |
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266 | # move element to end of display list |
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267 | set dlist [lreplace $dlist $i $i] |
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268 | lappend dlist $elem |
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269 | } |
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270 | } |
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271 | } |
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272 | } |
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273 | $g element show $dlist |
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274 | |
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275 | _fixLimits |
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276 | } |
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277 | |
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278 | # ---------------------------------------------------------------------- |
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279 | # USAGE: _fixLimits |
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280 | # |
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281 | # Used internally to apply automatic limits to the axes for the |
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282 | # current plot. |
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283 | # ---------------------------------------------------------------------- |
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284 | itcl::body Rappture::XyResult::_fixLimits {} { |
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285 | set g $itk_component(plot) |
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286 | |
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287 | # |
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288 | # HACK ALERT! |
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289 | # Use this code to fix up the y-axis limits for the BLT graph. |
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290 | # The auto-limits don't always work well. We want them to be |
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291 | # set to a "nice" number slightly above or below the min/max |
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292 | # limits. |
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293 | # |
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294 | $g axis configure x -min $_xmin -max $_xmax |
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295 | |
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296 | if {"" != $_ymin && "" != $_ymax} { |
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297 | set min $_ymin |
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298 | set max $_ymax |
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299 | set log [$g axis cget y -logscale] |
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300 | if {$log} { |
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301 | if {$min == $max} { |
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302 | set min [expr {0.9*$min}] |
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303 | set max [expr {1.1*$max}] |
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304 | } |
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305 | set min [expr {pow(10.0,floor(log10($min)))}] |
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306 | set max [expr {pow(10.0,ceil(log10($max)))}] |
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307 | } else { |
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308 | if {$min > 0} { |
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309 | set min [expr {0.95*$min}] |
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310 | } else { |
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311 | set min [expr {1.05*$min}] |
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312 | } |
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313 | if {$max > 0} { |
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314 | set max [expr {1.05*$max}] |
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315 | } else { |
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316 | set max [expr {0.95*$max}] |
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317 | } |
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318 | } |
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319 | $g axis configure y -min $min -max $max |
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320 | } else { |
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321 | $g axis configure y -min "" -max "" |
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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 | # CONFIGURATION OPTION: -gridcolor |
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327 | # ---------------------------------------------------------------------- |
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328 | itcl::configbody Rappture::XyResult::gridcolor { |
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329 | if {"" == $itk_option(-gridcolor)} { |
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330 | $itk_component(plot) grid off |
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331 | } else { |
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332 | $itk_component(plot) grid configure -color $itk_option(-gridcolor) |
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333 | $itk_component(plot) grid on |
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334 | } |
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335 | } |
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