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103 lines
2.3 KiB
Tcl
103 lines
2.3 KiB
Tcl
3 weeks ago
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#
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# Sizegrip widget bindings.
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#
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# Dragging a sizegrip widget resizes the containing toplevel.
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#
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# NOTE: the sizegrip widget must be in the lower right hand corner.
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#
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switch -- [tk windowingsystem] {
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x11 -
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win32 {
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option add *TSizegrip.cursor [ttk::cursor seresize]
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}
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aqua {
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# Aqua sizegrips use default Arrow cursor.
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}
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}
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namespace eval ttk::sizegrip {
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variable State
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array set State {
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pressed 0
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pressX 0
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pressY 0
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width 0
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height 0
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widthInc 1
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heightInc 1
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resizeX 1
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resizeY 1
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toplevel {}
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}
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}
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bind TSizegrip <ButtonPress-1> { ttk::sizegrip::Press %W %X %Y }
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bind TSizegrip <B1-Motion> { ttk::sizegrip::Drag %W %X %Y }
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bind TSizegrip <ButtonRelease-1> { ttk::sizegrip::Release %W %X %Y }
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proc ttk::sizegrip::Press {W X Y} {
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variable State
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if {[$W instate disabled]} { return }
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set top [winfo toplevel $W]
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# If the toplevel is not resizable then bail
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foreach {State(resizeX) State(resizeY)} [wm resizable $top] break
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if {!$State(resizeX) && !$State(resizeY)} {
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return
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}
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# Sanity-checks:
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# If a negative X or Y position was specified for [wm geometry],
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# just bail out -- there's no way to handle this cleanly.
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#
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if {[scan [wm geometry $top] "%dx%d+%d+%d" width height x y] != 4} {
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return;
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}
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# Account for gridded geometry:
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#
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set grid [wm grid $top]
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if {[llength $grid]} {
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set State(widthInc) [lindex $grid 2]
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set State(heightInc) [lindex $grid 3]
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} else {
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set State(widthInc) [set State(heightInc) 1]
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}
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set State(toplevel) $top
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set State(pressX) $X
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set State(pressY) $Y
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set State(width) $width
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set State(height) $height
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set State(x) $x
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set State(y) $y
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set State(pressed) 1
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}
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proc ttk::sizegrip::Drag {W X Y} {
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variable State
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if {!$State(pressed)} { return }
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set w $State(width)
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set h $State(height)
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if {$State(resizeX)} {
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set w [expr {$w + ($X - $State(pressX))/$State(widthInc)}]
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}
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if {$State(resizeY)} {
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set h [expr {$h + ($Y - $State(pressY))/$State(heightInc)}]
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}
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if {$w <= 0} { set w 1 }
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if {$h <= 0} { set h 1 }
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set x $State(x) ; set y $State(y)
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wm geometry $State(toplevel) ${w}x${h}+${x}+${y}
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}
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proc ttk::sizegrip::Release {W X Y} {
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variable State
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set State(pressed) 0
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}
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#*EOF*
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