1 | # ---------------------------------------------------------------------- |
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2 | # COMPONENT: tempgauge - gauge for temperature values |
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3 | # |
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4 | # This is a specialize form of the more general gauge, used for |
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5 | # displaying temperature values. |
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6 | # ====================================================================== |
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7 | # AUTHOR: Michael McLennan, Purdue University |
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8 | # Copyright (c) 2004 Purdue Research Foundation, West Lafayette, IN |
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9 | # ====================================================================== |
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10 | package require Itk |
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11 | |
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12 | option add *TemperatureGauge.width 30 widgetDefault |
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13 | option add *TemperatureGauge.height 0 widgetDefault |
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14 | option add *TemperatureGauge.textBackground #cccccc widgetDefault |
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15 | option add *TemperatureGauge.valuePosition "right" widgetDefault |
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16 | option add *TemperatureGauge.editable yes widgetDefault |
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17 | |
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18 | itcl::class Rappture::TemperatureGauge { |
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19 | inherit Rappture::Gauge |
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20 | |
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21 | constructor {args} { # defined below } |
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22 | |
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23 | protected method _redraw {} |
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24 | protected method _resize {} |
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25 | |
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26 | # create a spectrum to use for all temperature widgets |
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27 | private common _spectrum [Rappture::Spectrum [namespace current]::#auto { |
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28 | 0.0 blue |
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29 | 300.0 red |
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30 | 500.0 yellow |
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31 | } -units K] |
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32 | } |
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33 | |
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34 | itk::usual TemperatureGauge { |
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35 | } |
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36 | |
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37 | # ---------------------------------------------------------------------- |
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38 | # CONSTRUCTOR |
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39 | # ---------------------------------------------------------------------- |
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40 | itcl::body Rappture::TemperatureGauge::constructor {args} { |
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41 | eval itk_initialize -spectrum $_spectrum -units K $args |
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42 | } |
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43 | |
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44 | # ---------------------------------------------------------------------- |
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45 | # USAGE: _redraw |
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46 | # |
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47 | # Used internally to redraw the gauge on the internal canvas based |
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48 | # on the current value and the size of the widget. For this temperature |
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49 | # gauge, we draw something that looks like a thermometer. |
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50 | # ---------------------------------------------------------------------- |
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51 | itcl::body Rappture::TemperatureGauge::_redraw {} { |
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52 | set c $itk_component(icon) |
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53 | set w [winfo width $c] |
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54 | set h [winfo height $c] |
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55 | |
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56 | if {"" == [$c find all]} { |
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57 | # first time around, create the items |
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58 | $c create oval 0 0 1 1 -outline "" -tags bulbfill |
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59 | $c create oval 0 0 1 1 -outline black -tags bulboutline |
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60 | $c create rect 0 0 1 1 -outline black -fill white -tags stickoutline |
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61 | $c create rect 0 0 1 1 -outline "" -tags stickfill |
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62 | $c create image 0 0 -anchor w -image "" -tags bimage |
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63 | } |
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64 | |
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65 | if {"" != $itk_option(-spectrum)} { |
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66 | set color [$itk_option(-spectrum) get [value]] |
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67 | set frac [$itk_option(-spectrum) get -fraction [value]] |
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68 | } else { |
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69 | set color "" |
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70 | set frac 0 |
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71 | } |
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72 | |
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73 | # update the items based on current values |
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74 | set x 1 |
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75 | set y [expr {0.5*$h}] |
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76 | $c coords bimage 0 $y |
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77 | if {$itk_option(-image) != ""} { |
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78 | set x [expr {$x + [image width $itk_option(-image)] + 2}] |
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79 | } |
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80 | |
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81 | set avail [expr {$w-$x}] |
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82 | if {$avail > 0} { |
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83 | # |
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84 | # If we have any space left over, draw the thermometer |
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85 | # as a mercury bulb on the left and a stick to the right. |
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86 | # |
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87 | set bsize [expr {0.2*$avail}] |
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88 | if {$bsize > 0.5*$h-2} {set bsize [expr {0.5*$h-2}]} |
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89 | set ssize [expr {0.5*$bsize}] |
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90 | |
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91 | $c coords bulboutline $x [expr {$y-$bsize}] \ |
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92 | [expr {$x+2*$bsize}] [expr {$y+$bsize}] |
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93 | $c coords bulbfill $x [expr {$y-$bsize}] \ |
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94 | [expr {$x+2*$bsize}] [expr {$y+$bsize}] |
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95 | |
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96 | set x0 [expr {$x+2*$bsize+1}] |
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97 | set x1 [expr {$w-2}] |
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98 | set xr [expr {($x1-$x0)*$frac + $x0}] |
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99 | $c coords stickoutline [expr {$x0-2}] [expr {$y-$ssize}] \ |
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100 | $x1 [expr {$y+$ssize}] |
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101 | $c coords stickfill [expr {$x0-2}] [expr {$y-$ssize+1}] \ |
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102 | $xr [expr {$y+$ssize}] |
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103 | |
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104 | $c itemconfigure bulbfill -fill $color |
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105 | $c itemconfigure stickfill -fill $color |
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106 | } |
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107 | } |
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108 | |
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109 | # ---------------------------------------------------------------------- |
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110 | # USAGE: _resize |
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111 | # |
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112 | # Used internally to resize the internal canvas based on the -image |
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113 | # option or the size of the text. |
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114 | # ---------------------------------------------------------------------- |
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115 | itcl::body Rappture::TemperatureGauge::_resize {} { |
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116 | if {$itk_option(-width) > 0} { |
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117 | set w $itk_option(-width) |
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118 | } else { |
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119 | set w [winfo reqheight $itk_component(value)] |
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120 | } |
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121 | if {$itk_option(-image) != ""} { |
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122 | set w [expr {$w+[image width $itk_option(-image)]+4}] |
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123 | } |
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124 | |
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125 | if {$itk_option(-height) > 0} { |
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126 | set h $itk_option(-height) |
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127 | } else { |
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128 | if {$itk_option(-image) != ""} { |
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129 | set h [expr {[image height $itk_option(-image)]+4}] |
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130 | } else { |
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131 | set h [winfo reqheight $itk_component(value)] |
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132 | } |
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133 | } |
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134 | |
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135 | $itk_component(icon) configure -width $w -height $h |
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136 | } |
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