1 | mode: tcl; indent-tabs-mode: nil -*- |
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2 | # ---------------------------------------------------------------------- |
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3 | # COMPONENT: Sequencedial - selector, like the dial on a car radio |
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4 | # |
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5 | # This widget looks like the dial on an old-fashioned car radio. |
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6 | # It draws a series of values along an axis, and allows a selector |
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7 | # to move back and forth to select the values. |
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8 | # ====================================================================== |
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9 | # AUTHOR: Michael McLennan, Purdue University |
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10 | # Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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11 | # |
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12 | # See the file "license.terms" for information on usage and |
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13 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | # ====================================================================== |
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15 | package require Itk |
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16 | |
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17 | option add *SequenceDial.thickness 10 widgetDefault |
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18 | option add *SequenceDial.length 2i widgetDefault |
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19 | option add *SequenceDial.knobImage knob widgetDefault |
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20 | option add *SequenceDial.knobPosition n@middle widgetDefault |
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21 | option add *SequenceDial.dialOutlineColor black widgetDefault |
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22 | option add *SequenceDial.dialFillColor white widgetDefault |
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23 | option add *SequenceDial.lineColor gray widgetDefault |
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24 | option add *SequenceDial.activeLineColor black widgetDefault |
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25 | option add *SequenceDial.padding 0 widgetDefault |
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26 | option add *SequenceDial.valueWidth 10 widgetDefault |
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27 | option add *SequenceDial.valuePadding 0.1 widgetDefault |
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28 | option add *SequenceDial.foreground black widgetDefault |
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29 | option add *SequenceDial.font \ |
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30 | -*-helvetica-medium-r-normal-*-12-* widgetDefault |
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31 | |
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32 | itcl::class Rappture::SequenceDial { |
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33 | inherit itk::Widget |
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34 | |
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35 | itk_option define -min min Min "" |
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36 | itk_option define -max max Max "" |
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37 | itk_option define -variable variable Variable "" |
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38 | |
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39 | itk_option define -thickness thickness Thickness 0 |
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40 | itk_option define -length length Length 0 |
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41 | itk_option define -padding padding Padding 0 |
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42 | |
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43 | itk_option define -foreground foreground Foreground "black" |
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44 | itk_option define -dialoutlinecolor dialOutlineColor Color "black" |
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45 | itk_option define -dialfillcolor dialFillColor Color "white" |
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46 | itk_option define -dialprogresscolor dialProgressColor Color "" |
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47 | itk_option define -linecolor lineColor Color "black" |
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48 | itk_option define -activelinecolor activeLineColor Color "black" |
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49 | itk_option define -knobimage knobImage KnobImage "" |
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50 | itk_option define -knobposition knobPosition KnobPosition "" |
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51 | |
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52 | itk_option define -font font Font "" |
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53 | itk_option define -valuewidth valueWidth ValueWidth 0 |
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54 | itk_option define -valuepadding valuePadding ValuePadding 0 |
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55 | |
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56 | itk_option define -interactcommand interactCommand InteractCommand "" |
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57 | |
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58 | |
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59 | constructor {args} { # defined below } |
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60 | destructor { # defined below } |
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61 | |
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62 | public method add {label {value ""}} |
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63 | public method clear {} |
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64 | public method get {args} |
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65 | public method current {args} |
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66 | public method color {value} |
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67 | |
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68 | protected method _setCurrent {val} |
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69 | protected method _redraw {} |
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70 | protected method _click {x y} |
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71 | protected method _navigate {offset} |
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72 | protected method _limits {} |
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73 | protected method _findLabel {str} |
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74 | protected method _fixSize {} |
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75 | protected method _fixValue {args} |
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76 | protected method _doInteract {} |
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77 | |
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78 | private method EventuallyRedraw {} |
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79 | private variable _redrawPending 0 |
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80 | private variable _afterId -1 |
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81 | private variable _values "" ;# list of all values on the dial |
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82 | private variable _val2label ;# maps value => string label(s) |
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83 | private variable _current "" ;# current value (where pointer is) |
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84 | private variable _variable "" ;# variable associated with -variable |
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85 | |
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86 | private variable _knob "" ;# image for knob |
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87 | private variable _spectrum "" ;# width allocated for values |
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88 | private variable _activecolor "" ;# width allocated for values |
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89 | private variable _vwidth 0 ;# width allocated for values |
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90 | } |
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91 | |
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92 | itk::usual SequenceDial { |
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93 | keep -background -foreground -cursor -font |
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94 | } |
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95 | |
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96 | # ---------------------------------------------------------------------- |
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97 | # CONSTRUCTOR |
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98 | # ---------------------------------------------------------------------- |
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99 | itcl::body Rappture::SequenceDial::constructor {args} { |
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100 | itk_component add dial { |
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101 | canvas $itk_interior.dial |
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102 | } |
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103 | pack $itk_component(dial) -expand yes -fill both |
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104 | bind $itk_component(dial) <Configure> [itcl::code $this EventuallyRedraw] |
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105 | |
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106 | # bind $itk_component(dial) <ButtonPress-1> [itcl::code $this _click %x %y] |
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107 | bind $itk_component(dial) <B1-Motion> [itcl::code $this _click %x %y] |
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108 | # bind $itk_component(dial) <ButtonRelease-1> [itcl::code $this _click %x %y] |
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109 | |
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110 | bind $itk_component(hull) <KeyPress-Left> [itcl::code $this _navigate -1] |
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111 | bind $itk_component(hull) <KeyPress-Right> [itcl::code $this _navigate 1] |
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112 | |
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113 | eval itk_initialize $args |
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114 | |
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115 | _fixSize |
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116 | } |
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117 | |
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118 | # ---------------------------------------------------------------------- |
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119 | # DESTRUCTOR |
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120 | # ---------------------------------------------------------------------- |
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121 | itcl::body Rappture::SequenceDial::destructor {} { |
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122 | configure -variable "" ;# remove variable trace |
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123 | after cancel $_afterId |
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124 | } |
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125 | |
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126 | # ---------------------------------------------------------------------- |
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127 | # USAGE: add <label> ?<value>? |
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128 | # |
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129 | # Clients use this to add new values to the dial. Values are always |
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130 | # sorted in order along the dial. If the value is not specified, |
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131 | # then it is created automatically based on the number of elements |
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132 | # on the dial. |
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133 | # ---------------------------------------------------------------------- |
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134 | itcl::body Rappture::SequenceDial::add {label {value ""}} { |
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135 | if {"" == $value} { |
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136 | set value [llength $_values] |
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137 | } |
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138 | |
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139 | # Add this value if we've never see it before |
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140 | if {[lsearch -real $_values $value] < 0} { |
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141 | lappend _values $value |
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142 | set _values [lsort -real $_values] |
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143 | } |
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144 | |
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145 | # Keep all equivalent strings for this value. |
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146 | # That way, we can later select either "1e18" or "1.0e+18" |
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147 | lappend _val2label($value) $label |
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148 | |
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149 | if {"" == $_current} { |
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150 | _setCurrent $value |
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151 | } |
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152 | EventuallyRedraw |
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153 | } |
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154 | |
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155 | itcl::body Rappture::SequenceDial::EventuallyRedraw {} { |
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156 | if { !$_redrawPending } { |
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157 | set _afterId [after 150 [itcl::code $this _redraw]] |
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158 | event generate $itk_component(hull) <<Value>> |
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159 | set _resizePending 1 |
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160 | } |
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161 | } |
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162 | |
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163 | # ---------------------------------------------------------------------- |
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164 | # USAGE: clear |
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165 | # |
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166 | # Clients use this to remove all existing values from the dial. |
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167 | # ---------------------------------------------------------------------- |
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168 | itcl::body Rappture::SequenceDial::clear {} { |
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169 | set _values "" |
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170 | _setCurrent "" |
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171 | catch {unset _val2label} |
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172 | |
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173 | EventuallyRedraw |
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174 | } |
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175 | |
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176 | # ---------------------------------------------------------------------- |
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177 | # USAGE: get ?-format what? ?current|@index? |
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178 | # |
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179 | # Clients use this to query values within this radiodial. With no |
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180 | # args, it returns a list of all values stored in the widget. The |
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181 | # "current" arg requests only the current value on the radiodial. |
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182 | # The @index syntax can be used to request a particular value at |
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183 | # an index within the list of values. |
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184 | # |
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185 | # By default, this method returns the label for each value. The |
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186 | # format option can be used to request the label, the value, or |
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187 | # both. |
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188 | # ---------------------------------------------------------------------- |
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189 | itcl::body Rappture::SequenceDial::get {args} { |
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190 | Rappture::getopts args params { |
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191 | value -format "label" |
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192 | } |
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193 | if {[llength $args] > 1} { |
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194 | error "wrong # args: should be \"get ?-format f? ?current|@index\"" |
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195 | } |
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196 | set index [lindex $args 0] |
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197 | if {"" == $index} { |
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198 | set ilist "" |
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199 | for {set i 0} {$i < [llength $_values]} {incr i} { |
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200 | lappend ilist $i |
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201 | } |
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202 | } elseif {"current" == $index} { |
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203 | set ilist [lsearch -exact $_values $_current] |
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204 | if {$ilist < 0} { |
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205 | set ilist "" |
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206 | } |
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207 | } elseif {[regexp {^@([0-9]+|end)$} $index match i]} { |
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208 | set ilist $i |
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209 | } |
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210 | if {[llength $ilist] == 1} { |
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211 | set op set |
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212 | } else { |
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213 | set op lappend |
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214 | } |
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215 | |
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216 | set rlist "" |
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217 | foreach i $ilist { |
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218 | switch -- $params(-format) { |
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219 | label { |
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220 | set v [lindex $_values $i] |
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221 | $op rlist [lindex $_val2label($v) 0] |
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222 | } |
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223 | value { |
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224 | $op rlist [lindex $_values $i] |
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225 | } |
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226 | position { |
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227 | foreach {min max} [_limits] break |
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228 | set v [lindex $_values $i] |
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229 | set frac [expr {double($v-$min)/($max-$min)}] |
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230 | $op rlist $frac |
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231 | } |
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232 | all { |
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233 | set v [lindex $_values $i] |
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234 | foreach {min max} [_limits] break |
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235 | set frac [expr {double($v-$min)/($max-$min)}] |
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236 | set l [lindex $_val2label($v) 0] |
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237 | $op rlist [list $l $v $frac] |
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238 | } |
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239 | default { |
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240 | error "bad value \"$v\": should be label, value, position, all" |
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241 | } |
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242 | } |
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243 | } |
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244 | return $rlist |
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245 | } |
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246 | |
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247 | # ---------------------------------------------------------------------- |
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248 | # USAGE: current ?<newval>? |
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249 | # |
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250 | # Clients use this to get/set the current value for this widget. |
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251 | # ---------------------------------------------------------------------- |
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252 | itcl::body Rappture::SequenceDial::current {args} { |
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253 | if {[llength $args] == 0} { |
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254 | return $_current |
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255 | } elseif {[llength $args] == 1} { |
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256 | set newval [lindex $args 0] |
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257 | set n [_findLabel $newval] |
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258 | |
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259 | # Don't use expr (?:) because it evaluates the resulting string. |
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260 | # For example, it changes -0.020 to -0.02. |
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261 | if { $n >= 0 } { |
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262 | set rawval [lindex $_values $n] |
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263 | } else { |
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264 | set rawval "" |
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265 | } |
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266 | _setCurrent $rawval |
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267 | |
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268 | EventuallyRedraw |
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269 | event generate $itk_component(hull) <<Value>> |
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270 | |
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271 | return $_current |
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272 | } |
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273 | error "wrong # args: should be \"current ?newval?\"" |
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274 | } |
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275 | |
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276 | # ---------------------------------------------------------------------- |
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277 | # USAGE: color <value> |
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278 | # |
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279 | # Clients use this to query the color associated with a <value> |
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280 | # along the dial. |
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281 | # ---------------------------------------------------------------------- |
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282 | itcl::body Rappture::SequenceDial::color {value} { |
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283 | _findLabel $value ;# make sure this label is recognized |
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284 | |
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285 | if {"" != $_spectrum} { |
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286 | foreach {min max} [_limits] break |
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287 | set frac [expr {double($value-$min)/($max-$min)}] |
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288 | set color [$_spectrum get $frac] |
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289 | } else { |
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290 | if {$value == $_current} { |
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291 | set color $_activecolor |
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292 | } else { |
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293 | set color $itk_option(-linecolor) |
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294 | } |
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295 | } |
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296 | return $color |
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297 | } |
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298 | |
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299 | # ---------------------------------------------------------------------- |
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300 | # USAGE: _setCurrent <value> |
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301 | # |
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302 | # Called automatically whenever the widget changes size to redraw |
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303 | # all elements within it. |
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304 | # ---------------------------------------------------------------------- |
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305 | itcl::body Rappture::SequenceDial::_setCurrent {value} { |
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306 | set _current $value |
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307 | if {"" != $_variable} { |
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308 | upvar #0 $_variable var |
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309 | if {[info exists _val2label($value)]} { |
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310 | set var [lindex $_val2label($value) 0] |
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311 | } else { |
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312 | set var $value |
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313 | } |
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314 | } |
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315 | } |
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316 | |
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317 | # ---------------------------------------------------------------------- |
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318 | # USAGE: _redraw |
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319 | # |
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320 | # Called automatically whenever the widget changes size to redraw |
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321 | # all elements within it. |
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322 | # ---------------------------------------------------------------------- |
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323 | itcl::body Rappture::SequenceDial::_redraw {} { |
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324 | |
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325 | set _redrawPending 0 |
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326 | |
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327 | set c $itk_component(dial) |
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328 | $c delete all |
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329 | |
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330 | set fg $itk_option(-foreground) |
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331 | |
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332 | set w [winfo width $c] |
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333 | set h [winfo height $c] |
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334 | set p [winfo pixels $c $itk_option(-padding)] |
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335 | set t [expr {$itk_option(-thickness)+1}] |
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336 | set y1 [expr {$h-1}] |
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337 | |
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338 | if {"" != $_knob} { |
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339 | set kw [image width $_knob] |
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340 | set kh [image height $_knob] |
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341 | |
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342 | switch -- $itk_option(-knobposition) { |
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343 | n@top - nw@top - ne@top { |
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344 | set extra [expr {$t-$kh}] |
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345 | if {$extra < 0} {set extra 0} |
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346 | set y1 [expr {$h-$extra-1}] |
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347 | } |
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348 | n@middle - nw@middle - ne@middle { |
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349 | set extra [expr {int(ceil($kh-0.5*$t))}] |
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350 | if {$extra < 0} {set extra 0} |
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351 | set y1 [expr {$h-$extra-1}] |
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352 | } |
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353 | n@bottom - nw@bottom - ne@bottom { |
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354 | set y1 [expr {$h-$kh-1}] |
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355 | } |
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356 | |
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357 | e@top - w@top - center@top - |
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358 | e@bottom - w@bottom - center@bottom { |
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359 | set extra [expr {int(ceil(0.5*$kh))}] |
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360 | set y1 [expr {$h-$extra-1}] |
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361 | } |
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362 | e@middle - w@middle - center@middle { |
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363 | set extra [expr {int(ceil(0.5*($kh-$t)))}] |
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364 | if {$extra < 0} {set extra 0} |
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365 | set y1 [expr {$h-$extra-1}] |
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366 | } |
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367 | |
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368 | s@top - sw@top - se@top - |
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369 | s@middle - sw@middle - se@middle - |
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370 | s@bottom - sw@bottom - se@bottom { |
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371 | set y1 [expr {$h-2}] |
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372 | } |
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373 | } |
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374 | } |
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375 | set y0 [expr {$y1-$t}] |
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376 | set x0 [expr {$p+1}] |
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377 | set x1 [expr {$w-$_vwidth-$p-4}] |
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378 | foreach {min max} [_limits] break |
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379 | |
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380 | # draw the background rectangle |
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381 | $c create rectangle $x0 $y0 $x1 $y1 \ |
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382 | -outline $itk_option(-dialoutlinecolor) \ |
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383 | -fill $itk_option(-dialfillcolor) -tags "range" |
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384 | |
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385 | # draw the optional progress bar, from start to current |
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386 | if {"" != $itk_option(-dialprogresscolor) |
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387 | && [llength $_values] > 0 && "" != $_current} { |
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388 | if {$max != $min} { |
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389 | set frac [expr {double($_current-$min)/($max-$min)}] |
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390 | } else { |
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391 | set frac 0. |
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392 | } |
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393 | set xx1 [expr {$frac*($x1-$x0) + $x0}] |
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394 | $c create rectangle [expr {$x0+1}] [expr {$y0+3}] $xx1 [expr {$y1-2}] \ |
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395 | -outline "" -fill $itk_option(-dialprogresscolor) |
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396 | } |
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397 | |
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398 | $c create rectangle $x0 $y0 $x1 $y1 -outline "" -fill "" -tags "range" |
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399 | |
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400 | # draw lines for all values |
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401 | if {$max > $min} { |
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402 | foreach v $_values { |
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403 | set frac [expr {double($v-$min)/($max-$min)}] |
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404 | if {"" != $_spectrum} { |
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405 | set color [$_spectrum get $frac] |
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406 | } else { |
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407 | if {$v == $_current} { |
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408 | set color $_activecolor |
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409 | } else { |
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410 | set color $itk_option(-linecolor) |
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411 | } |
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412 | } |
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413 | set thick [expr {($v == $_current) ? 3 : 1}] |
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414 | |
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415 | if {"" != $color} { |
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416 | set x [expr {$frac*($x1-$x0) + $x0}] |
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417 | $c create line $x [expr {$y0+1}] $x $y1 \ |
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418 | -fill $color -width $thick |
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419 | } |
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420 | } |
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421 | |
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422 | if {"" != $_current} { |
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423 | set x [expr {double($_current-$min)/($max-$min)*($x1-$x0) + $x0}] |
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424 | regexp {([nsew]+|center)@} $itk_option(-knobposition) match anchor |
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425 | switch -glob -- $itk_option(-knobposition) { |
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426 | *@top { set kpos $y0 } |
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427 | *@middle { set kpos [expr {int(ceil(0.5*($y1+$y0)))}] } |
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428 | *@bottom { set kpos $y1 } |
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429 | } |
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430 | $c create image $x $kpos -anchor $anchor -image $_knob -tags "knob" |
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431 | } |
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432 | } |
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433 | |
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434 | $c bind range <ButtonPress-1> [itcl::code $this _click %x %y] |
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435 | $c bind range <ButtonRelease-1> [itcl::code $this _click %x %y] |
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436 | |
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437 | # Only need release event for knob. |
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438 | $c bind knob <ButtonRelease-1> [itcl::code $this _click %x %y] |
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439 | |
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440 | # if the -valuewidth is > 0, then make room for the value |
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441 | set vw $itk_option(-valuewidth) |
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442 | if {$vw > 0 && "" != $_current} { |
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443 | set str [lindex $_val2label($_current) 0] |
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444 | if {[string length $str] >= $vw} { |
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445 | set str "[string range $str 0 [expr {$vw-3}]]..." |
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446 | } |
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447 | |
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448 | set dy [expr {([font metrics $itk_option(-font) -linespace] |
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449 | - [font metrics $itk_option(-font) -ascent])/2}] |
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450 | |
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451 | set id [$c create text [expr {$x1+4}] [expr {($y1+$y0)/2+$dy}] \ |
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452 | -anchor w -text $str -font $itk_option(-font) -foreground $fg] |
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453 | foreach {x0 y0 x1 y1} [$c bbox $id] break |
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454 | set x0 [expr {$x0 + 10}] |
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455 | |
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456 | # set up a tooltip so you can mouse over truncated values |
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457 | Rappture::Tooltip::text $c [lindex $_val2label($_current) 0] |
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458 | $c bind $id <Enter> \ |
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459 | [list ::Rappture::Tooltip::tooltip pending %W +$x0,$y1] |
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460 | $c bind $id <Leave> \ |
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461 | [list ::Rappture::Tooltip::tooltip cancel] |
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462 | $c bind $id <ButtonPress> \ |
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463 | [list ::Rappture::Tooltip::tooltip cancel] |
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464 | $c bind $id <KeyPress> \ |
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465 | [list ::Rappture::Tooltip::tooltip cancel] |
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466 | } |
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467 | } |
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468 | |
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469 | # ---------------------------------------------------------------------- |
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470 | # USAGE: _click <x> <y> |
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471 | # |
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472 | # Called automatically whenever the user clicks or drags on the widget |
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473 | # to select a value. Moves the current value to the one nearest the |
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474 | # click point. If the value actually changes, it generates a <<Value>> |
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475 | # event to notify clients. |
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476 | # ---------------------------------------------------------------------- |
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477 | itcl::body Rappture::SequenceDial::_click {x y} { |
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478 | set c $itk_component(dial) |
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479 | set w [winfo width $c] |
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480 | set h [winfo height $c] |
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481 | set x0 1 |
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482 | set x1 [expr {$w-$_vwidth-4}] |
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483 | |
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484 | focus $itk_component(hull) |
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485 | |
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486 | # draw lines for all values |
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487 | foreach {min max} [_limits] break |
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488 | if {$max > $min && $x >= $x0 && $x <= $x1} { |
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489 | set dmin $w |
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490 | set xnearest 0 |
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491 | set vnearest "" |
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492 | foreach v $_values { |
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493 | set xv [expr {double($v-$min)/($max-$min)*($x1-$x0) + $x0}] |
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494 | if {abs($xv-$x) < $dmin} { |
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495 | set dmin [expr {abs($xv-$x)}] |
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496 | set xnearest $xv |
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497 | set vnearest $v |
---|
498 | } |
---|
499 | } |
---|
500 | |
---|
501 | if {$vnearest != $_current} { |
---|
502 | _setCurrent $vnearest |
---|
503 | EventuallyRedraw |
---|
504 | |
---|
505 | #event generate $itk_component(hull) <<Value>> |
---|
506 | _doInteract |
---|
507 | } |
---|
508 | } |
---|
509 | } |
---|
510 | |
---|
511 | # ---------------------------------------------------------------------- |
---|
512 | # USAGE: _navigate <offset> |
---|
513 | # |
---|
514 | # Called automatically whenever the user presses left/right keys |
---|
515 | # to nudge the current value left or right by some <offset>. If the |
---|
516 | # value actually changes, it generates a <<Value>> event to notify |
---|
517 | # clients. |
---|
518 | # ---------------------------------------------------------------------- |
---|
519 | itcl::body Rappture::SequenceDial::_navigate {offset} { |
---|
520 | set index [lsearch -exact $_values $_current] |
---|
521 | if {$index >= 0} { |
---|
522 | incr index $offset |
---|
523 | if {$index >= [llength $_values]} { |
---|
524 | set index [expr {[llength $_values]-1}] |
---|
525 | } elseif {$index < 0} { |
---|
526 | set index 0 |
---|
527 | } |
---|
528 | |
---|
529 | set newval [lindex $_values $index] |
---|
530 | if {$newval != $_current} { |
---|
531 | _setCurrent $newval |
---|
532 | EventuallyRedraw |
---|
533 | |
---|
534 | event generate $itk_component(hull) <<Value>> |
---|
535 | _doInteract |
---|
536 | } |
---|
537 | } |
---|
538 | } |
---|
539 | |
---|
540 | # ---------------------------------------------------------------------- |
---|
541 | # USAGE: _limits |
---|
542 | # |
---|
543 | # Used internally to compute the overall min/max limits for the |
---|
544 | # radio dial. Returns {min max}, representing the end values for |
---|
545 | # the scale. |
---|
546 | # ---------------------------------------------------------------------- |
---|
547 | itcl::body Rappture::SequenceDial::_limits {} { |
---|
548 | if {[llength $_values] == 0} { |
---|
549 | set min 0 |
---|
550 | set max 0 |
---|
551 | } else { |
---|
552 | set min [lindex $_values 0] |
---|
553 | set max $min |
---|
554 | foreach v [lrange $_values 1 end] { |
---|
555 | if {$v < $min} { set min $v } |
---|
556 | if {$v > $max} { set max $v } |
---|
557 | } |
---|
558 | set del [expr {$max-$min}] |
---|
559 | set min [expr {$min-$itk_option(-valuepadding)*$del}] |
---|
560 | set max [expr {$max+$itk_option(-valuepadding)*$del}] |
---|
561 | } |
---|
562 | |
---|
563 | if {"" != $itk_option(-min)} { |
---|
564 | set min $itk_option(-min) |
---|
565 | } |
---|
566 | if {"" != $itk_option(-max)} { |
---|
567 | set max $itk_option(-max) |
---|
568 | } |
---|
569 | return [list $min $max] |
---|
570 | } |
---|
571 | |
---|
572 | # ---------------------------------------------------------------------- |
---|
573 | # USAGE: _findLabel <string> |
---|
574 | # |
---|
575 | # Used internally to search for the given <string> label among the |
---|
576 | # known values. Returns an index into the _values list, or throws |
---|
577 | # an error if the string is not recognized. Given the null string, |
---|
578 | # it returns -1, indicating that the value is not in _values, but |
---|
579 | # it is valid. |
---|
580 | # ---------------------------------------------------------------------- |
---|
581 | itcl::body Rappture::SequenceDial::_findLabel {str} { |
---|
582 | if {"" == $str} { |
---|
583 | return -1 |
---|
584 | } |
---|
585 | for {set nv 0} {$nv < [llength $_values]} {incr nv} { |
---|
586 | set v [lindex $_values $nv] |
---|
587 | if {[lsearch -exact $_val2label($v) $str] >= 0} { |
---|
588 | return $nv |
---|
589 | } |
---|
590 | } |
---|
591 | |
---|
592 | # didn't match -- build a return string of possible values |
---|
593 | set labels "" |
---|
594 | foreach vlist $_values { |
---|
595 | foreach v $vlist { |
---|
596 | lappend labels "\"$_val2label($v)\"" |
---|
597 | } |
---|
598 | } |
---|
599 | error "bad value \"$str\": should be one of [join $labels ,]" |
---|
600 | } |
---|
601 | |
---|
602 | # ---------------------------------------------------------------------- |
---|
603 | # USAGE: _fixSize |
---|
604 | # |
---|
605 | # Used internally to compute the overall size of the widget based |
---|
606 | # on the -thickness and -length options. |
---|
607 | # ---------------------------------------------------------------------- |
---|
608 | itcl::body Rappture::SequenceDial::_fixSize {} { |
---|
609 | set h [winfo pixels $itk_component(hull) $itk_option(-thickness)] |
---|
610 | |
---|
611 | if {"" != $_knob} { |
---|
612 | set kh [image height $_knob] |
---|
613 | |
---|
614 | switch -- $itk_option(-knobposition) { |
---|
615 | n@top - nw@top - ne@top - |
---|
616 | s@bottom - sw@bottom - se@bottom { |
---|
617 | if {$kh > $h} { set h $kh } |
---|
618 | } |
---|
619 | n@middle - nw@middle - ne@middle - |
---|
620 | s@middle - sw@middle - se@middle { |
---|
621 | set h [expr {int(ceil(0.5*$h + $kh))}] |
---|
622 | } |
---|
623 | n@bottom - nw@bottom - ne@bottom - |
---|
624 | s@top - sw@top - se@top { |
---|
625 | set h [expr {$h + $kh}] |
---|
626 | } |
---|
627 | e@middle - w@middle - center@middle { |
---|
628 | set h [expr {(($h > $kh) ? $h : $kh) + 1}] |
---|
629 | } |
---|
630 | n@middle - ne@middle - nw@middle - |
---|
631 | s@middle - se@middle - sw@middle { |
---|
632 | set extra [expr {int(ceil($kh-0.5*$h))}] |
---|
633 | if {$extra < 0} { set extra 0 } |
---|
634 | set h [expr {$h+$extra}] |
---|
635 | } |
---|
636 | } |
---|
637 | } |
---|
638 | incr h 1 |
---|
639 | |
---|
640 | set w [winfo pixels $itk_component(hull) $itk_option(-length)] |
---|
641 | |
---|
642 | # if the -valuewidth is > 0, then make room for the value |
---|
643 | if {$itk_option(-valuewidth) > 0} { |
---|
644 | set charw [font measure $itk_option(-font) "n"] |
---|
645 | set _vwidth [expr {$itk_option(-valuewidth)*$charw}] |
---|
646 | set w [expr {$w+$_vwidth+4}] |
---|
647 | } else { |
---|
648 | set _vwidth 0 |
---|
649 | } |
---|
650 | |
---|
651 | $itk_component(dial) configure -width $w -height $h |
---|
652 | } |
---|
653 | |
---|
654 | # ---------------------------------------------------------------------- |
---|
655 | # USAGE: _fixValue ?<name1> <name2> <op>? |
---|
656 | # |
---|
657 | # Invoked automatically whenever the -variable associated with this |
---|
658 | # widget is modified. Copies the value to the current settings for |
---|
659 | # the widget. |
---|
660 | # ---------------------------------------------------------------------- |
---|
661 | itcl::body Rappture::SequenceDial::_fixValue {args} { |
---|
662 | if {"" == $itk_option(-variable)} { |
---|
663 | return |
---|
664 | } |
---|
665 | upvar #0 $itk_option(-variable) var |
---|
666 | |
---|
667 | set newval $var |
---|
668 | set n [_findLabel $newval] |
---|
669 | set rawval [expr {($n >= 0) ? [lindex $_values $n] : ""}] |
---|
670 | set _current $rawval ;# set current directly, so we don't trigger again |
---|
671 | |
---|
672 | EventuallyRedraw |
---|
673 | event generate $itk_component(hull) <<Value>> |
---|
674 | } |
---|
675 | |
---|
676 | # ---------------------------------------------------------------------- |
---|
677 | # USAGE: _doInteract |
---|
678 | # |
---|
679 | # Used internally to call the -interactcommand code whenever the user |
---|
680 | # changes the value of the widget. This is different from the <<Value>> |
---|
681 | # event, which gets invoked whenever the value changes for any reason, |
---|
682 | # including programmatic changes. If there is no command code, then |
---|
683 | # this does nothing. |
---|
684 | # ---------------------------------------------------------------------- |
---|
685 | itcl::body Rappture::SequenceDial::_doInteract {} { |
---|
686 | if {[string length $itk_option(-interactcommand)] > 0} { |
---|
687 | uplevel #0 $itk_option(-interactcommand) |
---|
688 | } |
---|
689 | } |
---|
690 | |
---|
691 | # ---------------------------------------------------------------------- |
---|
692 | # CONFIGURE: -thickness |
---|
693 | # ---------------------------------------------------------------------- |
---|
694 | itcl::configbody Rappture::SequenceDial::thickness { |
---|
695 | _fixSize |
---|
696 | } |
---|
697 | |
---|
698 | # ---------------------------------------------------------------------- |
---|
699 | # CONFIGURE: -length |
---|
700 | # ---------------------------------------------------------------------- |
---|
701 | itcl::configbody Rappture::SequenceDial::length { |
---|
702 | _fixSize |
---|
703 | } |
---|
704 | |
---|
705 | # ---------------------------------------------------------------------- |
---|
706 | # CONFIGURE: -font |
---|
707 | # ---------------------------------------------------------------------- |
---|
708 | itcl::configbody Rappture::SequenceDial::font { |
---|
709 | _fixSize |
---|
710 | } |
---|
711 | |
---|
712 | # ---------------------------------------------------------------------- |
---|
713 | # CONFIGURE: -valuewidth |
---|
714 | # ---------------------------------------------------------------------- |
---|
715 | itcl::configbody Rappture::SequenceDial::valuewidth { |
---|
716 | if {![string is integer $itk_option(-valuewidth)]} { |
---|
717 | error "bad value \"$itk_option(-valuewidth)\": should be integer" |
---|
718 | } |
---|
719 | _fixSize |
---|
720 | EventuallyRedraw |
---|
721 | } |
---|
722 | |
---|
723 | # ---------------------------------------------------------------------- |
---|
724 | # CONFIGURE: -foreground |
---|
725 | # ---------------------------------------------------------------------- |
---|
726 | itcl::configbody Rappture::SequenceDial::foreground { |
---|
727 | EventuallyRedraw |
---|
728 | } |
---|
729 | |
---|
730 | # ---------------------------------------------------------------------- |
---|
731 | # CONFIGURE: -dialoutlinecolor |
---|
732 | # ---------------------------------------------------------------------- |
---|
733 | itcl::configbody Rappture::SequenceDial::dialoutlinecolor { |
---|
734 | EventuallyRedraw |
---|
735 | } |
---|
736 | |
---|
737 | # ---------------------------------------------------------------------- |
---|
738 | # CONFIGURE: -dialfillcolor |
---|
739 | # ---------------------------------------------------------------------- |
---|
740 | itcl::configbody Rappture::SequenceDial::dialfillcolor { |
---|
741 | EventuallyRedraw |
---|
742 | } |
---|
743 | |
---|
744 | # ---------------------------------------------------------------------- |
---|
745 | # CONFIGURE: -dialprogresscolor |
---|
746 | # ---------------------------------------------------------------------- |
---|
747 | itcl::configbody Rappture::SequenceDial::dialprogresscolor { |
---|
748 | EventuallyRedraw |
---|
749 | } |
---|
750 | |
---|
751 | # ---------------------------------------------------------------------- |
---|
752 | # CONFIGURE: -linecolor |
---|
753 | # ---------------------------------------------------------------------- |
---|
754 | itcl::configbody Rappture::SequenceDial::linecolor { |
---|
755 | EventuallyRedraw |
---|
756 | } |
---|
757 | |
---|
758 | # ---------------------------------------------------------------------- |
---|
759 | # CONFIGURE: -activelinecolor |
---|
760 | # ---------------------------------------------------------------------- |
---|
761 | itcl::configbody Rappture::SequenceDial::activelinecolor { |
---|
762 | set val $itk_option(-activelinecolor) |
---|
763 | if {[catch {$val isa ::Rappture::Spectrum} valid] == 0 && $valid} { |
---|
764 | set _spectrum $val |
---|
765 | set _activecolor "" |
---|
766 | } elseif {[catch {winfo rgb $itk_component(hull) $val}] == 0} { |
---|
767 | set _spectrum "" |
---|
768 | set _activecolor $val |
---|
769 | } elseif {"" != $val} { |
---|
770 | error "bad value \"$val\": should be Spectrum object or color" |
---|
771 | } |
---|
772 | EventuallyRedraw |
---|
773 | } |
---|
774 | |
---|
775 | # ---------------------------------------------------------------------- |
---|
776 | # CONFIGURE: -knobimage |
---|
777 | # ---------------------------------------------------------------------- |
---|
778 | itcl::configbody Rappture::SequenceDial::knobimage { |
---|
779 | if {[regexp {^image[0-9]+$} $itk_option(-knobimage)]} { |
---|
780 | set _knob $itk_option(-knobimage) |
---|
781 | } elseif {"" != $itk_option(-knobimage)} { |
---|
782 | set _knob [Rappture::icon $itk_option(-knobimage)] |
---|
783 | } else { |
---|
784 | set _knob "" |
---|
785 | } |
---|
786 | _fixSize |
---|
787 | |
---|
788 | EventuallyRedraw |
---|
789 | } |
---|
790 | |
---|
791 | # ---------------------------------------------------------------------- |
---|
792 | # CONFIGURE: -knobposition |
---|
793 | # ---------------------------------------------------------------------- |
---|
794 | itcl::configbody Rappture::SequenceDial::knobposition { |
---|
795 | if {![regexp {^([nsew]+|center)@(top|middle|bottom)$} $itk_option(-knobposition)]} { |
---|
796 | error "bad value \"$itk_option(-knobposition)\": should be anchor@top|middle|bottom" |
---|
797 | } |
---|
798 | _fixSize |
---|
799 | |
---|
800 | EventuallyRedraw |
---|
801 | } |
---|
802 | |
---|
803 | # ---------------------------------------------------------------------- |
---|
804 | # CONFIGURE: -padding |
---|
805 | # This adds padding on left/right side of dial background. |
---|
806 | # ---------------------------------------------------------------------- |
---|
807 | itcl::configbody Rappture::SequenceDial::padding { |
---|
808 | if {[catch {winfo pixels $itk_component(hull) $itk_option(-padding)}]} { |
---|
809 | error "bad value \"$itk_option(-padding)\": should be size in pixels" |
---|
810 | } |
---|
811 | } |
---|
812 | |
---|
813 | # ---------------------------------------------------------------------- |
---|
814 | # CONFIGURE: -valuepadding |
---|
815 | # This shifts min/max limits in by a fraction of the overall size. |
---|
816 | # ---------------------------------------------------------------------- |
---|
817 | itcl::configbody Rappture::SequenceDial::valuepadding { |
---|
818 | if {![string is double $itk_option(-valuepadding)] |
---|
819 | || $itk_option(-valuepadding) < 0} { |
---|
820 | error "bad value \"$itk_option(-valuepadding)\": should be >= 0.0" |
---|
821 | } |
---|
822 | } |
---|
823 | |
---|
824 | # ---------------------------------------------------------------------- |
---|
825 | # CONFIGURE: -variable |
---|
826 | # ---------------------------------------------------------------------- |
---|
827 | itcl::configbody Rappture::SequenceDial::variable { |
---|
828 | if {"" != $_variable} { |
---|
829 | upvar #0 $_variable var |
---|
830 | trace remove variable var write [itcl::code $this _fixValue] |
---|
831 | } |
---|
832 | |
---|
833 | set _variable $itk_option(-variable) |
---|
834 | |
---|
835 | if {"" != $_variable} { |
---|
836 | upvar #0 $_variable var |
---|
837 | trace add variable var write [itcl::code $this _fixValue] |
---|
838 | |
---|
839 | # sync to the current value of this variable |
---|
840 | if {[info exists var]} { |
---|
841 | _fixValue |
---|
842 | } |
---|
843 | } |
---|
844 | } |
---|