1 | # scale.tcl -- |
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2 | # |
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3 | # This file defines the default bindings for Tk scale widgets and provides |
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4 | # procedures that help in implementing the bindings. |
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5 | # |
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6 | # RCS: @(#) $Id: scale.tcl,v 1.9.2.3 2003/10/03 00:42:17 patthoyts Exp $ |
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7 | # |
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8 | # Copyright (c) 1994 The Regents of the University of California. |
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9 | # Copyright (c) 1994-1995 Sun Microsystems, Inc. |
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10 | # |
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11 | # See the file "license.terms" for information on usage and redistribution |
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12 | # of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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13 | # |
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14 | |
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15 | #------------------------------------------------------------------------- |
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16 | # The code below creates the default class bindings for entries. |
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17 | #------------------------------------------------------------------------- |
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18 | |
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19 | # Standard Motif bindings: |
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20 | |
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21 | bind Scale <Enter> { |
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22 | if {$tk_strictMotif} { |
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23 | set tk::Priv(activeBg) [%W cget -activebackground] |
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24 | %W config -activebackground [%W cget -background] |
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25 | } |
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26 | tk::ScaleActivate %W %x %y |
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27 | } |
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28 | bind Scale <Motion> { |
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29 | tk::ScaleActivate %W %x %y |
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30 | } |
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31 | bind Scale <Leave> { |
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32 | if {$tk_strictMotif} { |
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33 | %W config -activebackground $tk::Priv(activeBg) |
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34 | } |
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35 | if {[string equal [%W cget -state] "active"]} { |
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36 | %W configure -state normal |
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37 | } |
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38 | } |
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39 | bind Scale <1> { |
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40 | tk::ScaleButtonDown %W %x %y |
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41 | } |
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42 | bind Scale <B1-Motion> { |
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43 | tk::ScaleDrag %W %x %y |
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44 | } |
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45 | bind Scale <B1-Leave> { } |
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46 | bind Scale <B1-Enter> { } |
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47 | bind Scale <ButtonRelease-1> { |
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48 | tk::CancelRepeat |
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49 | tk::ScaleEndDrag %W |
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50 | tk::ScaleActivate %W %x %y |
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51 | } |
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52 | bind Scale <2> { |
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53 | tk::ScaleButton2Down %W %x %y |
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54 | } |
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55 | bind Scale <B2-Motion> { |
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56 | tk::ScaleDrag %W %x %y |
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57 | } |
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58 | bind Scale <B2-Leave> { } |
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59 | bind Scale <B2-Enter> { } |
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60 | bind Scale <ButtonRelease-2> { |
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61 | tk::CancelRepeat |
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62 | tk::ScaleEndDrag %W |
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63 | tk::ScaleActivate %W %x %y |
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64 | } |
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65 | if {[string equal $tcl_platform(platform) "windows"]} { |
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66 | # On Windows do the same with button 3, as that is the right mouse button |
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67 | bind Scale <3> [bind Scale <2>] |
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68 | bind Scale <B3-Motion> [bind Scale <B2-Motion>] |
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69 | bind Scale <B3-Leave> [bind Scale <B2-Leave>] |
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70 | bind Scale <B3-Enter> [bind Scale <B2-Enter>] |
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71 | bind Scale <ButtonRelease-3> [bind Scale <ButtonRelease-2>] |
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72 | } |
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73 | bind Scale <Control-1> { |
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74 | tk::ScaleControlPress %W %x %y |
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75 | } |
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76 | bind Scale <Up> { |
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77 | tk::ScaleIncrement %W up little noRepeat |
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78 | } |
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79 | bind Scale <Down> { |
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80 | tk::ScaleIncrement %W down little noRepeat |
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81 | } |
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82 | bind Scale <Left> { |
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83 | tk::ScaleIncrement %W up little noRepeat |
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84 | } |
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85 | bind Scale <Right> { |
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86 | tk::ScaleIncrement %W down little noRepeat |
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87 | } |
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88 | bind Scale <Control-Up> { |
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89 | tk::ScaleIncrement %W up big noRepeat |
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90 | } |
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91 | bind Scale <Control-Down> { |
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92 | tk::ScaleIncrement %W down big noRepeat |
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93 | } |
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94 | bind Scale <Control-Left> { |
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95 | tk::ScaleIncrement %W up big noRepeat |
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96 | } |
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97 | bind Scale <Control-Right> { |
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98 | tk::ScaleIncrement %W down big noRepeat |
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99 | } |
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100 | bind Scale <Home> { |
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101 | %W set [%W cget -from] |
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102 | } |
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103 | bind Scale <End> { |
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104 | %W set [%W cget -to] |
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105 | } |
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106 | |
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107 | # ::tk::ScaleActivate -- |
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108 | # This procedure is invoked to check a given x-y position in the |
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109 | # scale and activate the slider if the x-y position falls within |
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110 | # the slider. |
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111 | # |
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112 | # Arguments: |
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113 | # w - The scale widget. |
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114 | # x, y - Mouse coordinates. |
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115 | |
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116 | proc ::tk::ScaleActivate {w x y} { |
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117 | if {[string equal [$w cget -state] "disabled"]} { |
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118 | return |
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119 | } |
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120 | if {[string equal [$w identify $x $y] "slider"]} { |
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121 | set state active |
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122 | } else { |
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123 | set state normal |
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124 | } |
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125 | if {[string compare [$w cget -state] $state]} { |
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126 | $w configure -state $state |
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127 | } |
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128 | } |
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129 | |
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130 | # ::tk::ScaleButtonDown -- |
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131 | # This procedure is invoked when a button is pressed in a scale. It |
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132 | # takes different actions depending on where the button was pressed. |
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133 | # |
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134 | # Arguments: |
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135 | # w - The scale widget. |
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136 | # x, y - Mouse coordinates of button press. |
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137 | |
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138 | proc ::tk::ScaleButtonDown {w x y} { |
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139 | variable ::tk::Priv |
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140 | set Priv(dragging) 0 |
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141 | set el [$w identify $x $y] |
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142 | |
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143 | # save the relief |
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144 | set Priv($w,relief) [$w cget -sliderrelief] |
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145 | |
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146 | if {[string equal $el "trough1"]} { |
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147 | ScaleIncrement $w up little initial |
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148 | } elseif {[string equal $el "trough2"]} { |
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149 | ScaleIncrement $w down little initial |
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150 | } elseif {[string equal $el "slider"]} { |
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151 | set Priv(dragging) 1 |
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152 | set Priv(initValue) [$w get] |
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153 | set coords [$w coords] |
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154 | set Priv(deltaX) [expr {$x - [lindex $coords 0]}] |
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155 | set Priv(deltaY) [expr {$y - [lindex $coords 1]}] |
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156 | switch -exact -- $Priv($w,relief) { |
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157 | "raised" { $w configure -sliderrelief sunken } |
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158 | "ridge" { $w configure -sliderrelief groove } |
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159 | } |
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160 | } |
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161 | } |
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162 | |
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163 | # ::tk::ScaleDrag -- |
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164 | # This procedure is called when the mouse is dragged with |
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165 | # mouse button 1 down. If the drag started inside the slider |
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166 | # (i.e. the scale is active) then the scale's value is adjusted |
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167 | # to reflect the mouse's position. |
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168 | # |
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169 | # Arguments: |
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170 | # w - The scale widget. |
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171 | # x, y - Mouse coordinates. |
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172 | |
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173 | proc ::tk::ScaleDrag {w x y} { |
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174 | variable ::tk::Priv |
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175 | if {!$Priv(dragging)} { |
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176 | return |
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177 | } |
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178 | $w set [$w get [expr {$x-$Priv(deltaX)}] [expr {$y-$Priv(deltaY)}]] |
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179 | } |
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180 | |
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181 | # ::tk::ScaleEndDrag -- |
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182 | # This procedure is called to end an interactive drag of the |
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183 | # slider. It just marks the drag as over. |
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184 | # |
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185 | # Arguments: |
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186 | # w - The scale widget. |
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187 | |
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188 | proc ::tk::ScaleEndDrag {w} { |
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189 | variable ::tk::Priv |
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190 | set Priv(dragging) 0 |
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191 | if {[info exists Priv($w,relief)]} { |
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192 | $w configure -sliderrelief $Priv($w,relief) |
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193 | unset Priv($w,relief) |
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194 | } |
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195 | } |
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196 | |
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197 | # ::tk::ScaleIncrement -- |
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198 | # This procedure is invoked to increment the value of a scale and |
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199 | # to set up auto-repeating of the action if that is desired. The |
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200 | # way the value is incremented depends on the "dir" and "big" |
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201 | # arguments. |
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202 | # |
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203 | # Arguments: |
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204 | # w - The scale widget. |
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205 | # dir - "up" means move value towards -from, "down" means |
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206 | # move towards -to. |
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207 | # big - Size of increments: "big" or "little". |
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208 | # repeat - Whether and how to auto-repeat the action: "noRepeat" |
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209 | # means don't auto-repeat, "initial" means this is the |
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210 | # first action in an auto-repeat sequence, and "again" |
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211 | # means this is the second repetition or later. |
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212 | |
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213 | proc ::tk::ScaleIncrement {w dir big repeat} { |
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214 | variable ::tk::Priv |
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215 | if {![winfo exists $w]} return |
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216 | if {[string equal $big "big"]} { |
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217 | set inc [$w cget -bigincrement] |
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218 | if {$inc == 0} { |
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219 | set inc [expr {abs([$w cget -to] - [$w cget -from])/10.0}] |
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220 | } |
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221 | if {$inc < [$w cget -resolution]} { |
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222 | set inc [$w cget -resolution] |
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223 | } |
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224 | } else { |
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225 | set inc [$w cget -resolution] |
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226 | } |
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227 | if {([$w cget -from] > [$w cget -to]) ^ [string equal $dir "up"]} { |
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228 | set inc [expr {-$inc}] |
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229 | } |
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230 | $w set [expr {[$w get] + $inc}] |
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231 | |
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232 | if {[string equal $repeat "again"]} { |
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233 | set Priv(afterId) [after [$w cget -repeatinterval] \ |
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234 | [list tk::ScaleIncrement $w $dir $big again]] |
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235 | } elseif {[string equal $repeat "initial"]} { |
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236 | set delay [$w cget -repeatdelay] |
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237 | if {$delay > 0} { |
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238 | set Priv(afterId) [after $delay \ |
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239 | [list tk::ScaleIncrement $w $dir $big again]] |
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240 | } |
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241 | } |
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242 | } |
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243 | |
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244 | # ::tk::ScaleControlPress -- |
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245 | # This procedure handles button presses that are made with the Control |
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246 | # key down. Depending on the mouse position, it adjusts the scale |
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247 | # value to one end of the range or the other. |
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248 | # |
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249 | # Arguments: |
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250 | # w - The scale widget. |
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251 | # x, y - Mouse coordinates where the button was pressed. |
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252 | |
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253 | proc ::tk::ScaleControlPress {w x y} { |
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254 | set el [$w identify $x $y] |
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255 | if {[string equal $el "trough1"]} { |
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256 | $w set [$w cget -from] |
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257 | } elseif {[string equal $el "trough2"]} { |
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258 | $w set [$w cget -to] |
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259 | } |
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260 | } |
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261 | |
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262 | # ::tk::ScaleButton2Down |
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263 | # This procedure is invoked when button 2 is pressed over a scale. |
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264 | # It sets the value to correspond to the mouse position and starts |
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265 | # a slider drag. |
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266 | # |
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267 | # Arguments: |
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268 | # w - The scrollbar widget. |
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269 | # x, y - Mouse coordinates within the widget. |
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270 | |
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271 | proc ::tk::ScaleButton2Down {w x y} { |
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272 | variable ::tk::Priv |
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273 | |
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274 | if {[string equal [$w cget -state] "disabled"]} { |
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275 | return |
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276 | } |
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277 | $w configure -state active |
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278 | $w set [$w get $x $y] |
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279 | set Priv(dragging) 1 |
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280 | set Priv(initValue) [$w get] |
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281 | set Priv($w,relief) [$w cget -sliderrelief] |
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282 | set coords "$x $y" |
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283 | set Priv(deltaX) 0 |
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284 | set Priv(deltaY) 0 |
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285 | } |
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