diff options
Diffstat (limited to 'sandbox/controls.tcl')
-rw-r--r-- | sandbox/controls.tcl | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/sandbox/controls.tcl b/sandbox/controls.tcl new file mode 100644 index 0000000..9301d1a --- /dev/null +++ b/sandbox/controls.tcl @@ -0,0 +1,158 @@ +set tlbbox [.r add group $top -sensitive f -visible f -tags currentbbox] +.r add rectangle $tlbbox "-3 -3 +3 +3" +set trbbox [.r add group $top -sensitive f -visible f -tags currentbbox] +.r add rectangle $trbbox "-3 -3 +3 +3" +set blbbox [.r add group $top -sensitive f -visible f -tags currentbbox] +.r add rectangle $blbbox "-3 -3 +3 +3" +set brbbox [.r add group $top -sensitive f -visible f -tags currentbbox] +.r add rectangle $brbbox "-3 -3 +3 +3" +.r add rectangle $top "0 0 1 1" -linecolor red -tags "lasso" -visible f -sensitive f + +# +# Controls for the window transform. +# +proc press {lx ly action} { + global x y angle + set x $lx + set y $ly + set angle [expr atan2($y, $x)] + bind .r "<Motion>" "$action %x %y" +} + +proc motion {lx ly} { + global x y + set it [.r find withtag controls] + if {$it != ""} { + set it [.r group [lindex $it 0]] + } + set res [.r transform $it "$lx $ly $x $y"] + set nx [lindex $res 0] + set ny [lindex $res 1] + set ox [lindex $res 2] + set oy [lindex $res 3] + .r translate controls [expr $nx - $ox] [expr $ny - $oy] + set x $lx + set y $ly +} + +proc zoom {lx ly} { + global x y + + if {$lx > $x} { + set maxx $lx + } else { + set maxx $x + } + if {$ly > $y} { + set maxy $ly + } else { + set maxy $y + } + set sx [expr 1.0 + double($lx - $x)/$maxx] + set sy [expr 1.0 + double($ly - $y)/$maxy] + set x $lx + set y $ly + .r scale controls $sx $sy +} + +proc rotate {lx ly} { + global angle + + set langle [expr atan2($ly, $lx)] + .r rotate controls [expr -($langle-$angle)] + set angle $langle +} + +proc release {} { + bind .r "<Motion>" "" +} + +proc start_lasso {lx ly} { + global top x y cx cy + set x $lx + set y $ly + set cx $lx + set cy $ly + set coords [.r transform $top "$x $y"] + set fx [lindex $coords 0] + set fy [lindex $coords 1] + .r coords lasso "$fx $fy $fx $fy" + .r itemconfigure lasso -visible t + .r raise lasso + bind .r "<Motion>" "lasso %x %y" +} + +proc lasso {lx ly} { + global top x y cx cy + set cx $lx + set cy $ly + set coords [.r transform $top "$x $y $lx $ly"] + set fx [lindex $coords 0] + set fy [lindex $coords 1] + set fcx [lindex $coords 2] + set fcy [lindex $coords 3] + .r coords lasso "$fx $fy $fcx $fcy" +} + +proc fin_lasso {} { + global x y cx cy + + bind .r "<Motion>" "" + .r itemconfigure lasso -visible f +# puts "x=$x, y=$y, cx=$cx, cy=$cy" + puts "enclosed='[.r find enclosed $x $y $cx $cy]', overlapping='[.r find overlapping $x $y $cx $cy]'" +} + +proc getrect {x y} { + list [expr $x-3] [expr $y-3] [expr $x+3] [expr $y+3] +} + +proc showbox {} { + global top tlbbox trbbox blbbox brbbox + + if { ! [.r hastag current currentbbox]} { + if {[catch {.r find withtag current} item] } { + return + } + set coords [.r transform $top [.r bbox current]] + set xo [lindex $coords 0] + set yo [lindex $coords 1] + set xc [lindex $coords 2] + set yc [lindex $coords 3] + + .r coords $tlbbox "$xo $yo" + .r coords $trbbox "$xc $yo" + .r coords $brbbox "$xc $yc" + .r coords $blbbox "$xo $yc" + .r itemconfigure currentbbox -visible t + } +} + +proc hidebox {lx ly} { + set next [.r find atpoint $lx $ly] + if {[llength $next] > 1} { + set next [lindex $next 0] + } + if { $next == "" || ! [.r hastag $next currentbbox] ||\ + [.r hastag current currentbbox]} { + .r itemconfigure currentbbox -visible f + } +} + + +bind .r "<ButtonPress-1>" "start_lasso %x %y" +bind .r "<ButtonRelease-1>" fin_lasso + +bind .r "<ButtonPress-2>" {puts "at point='[.r find atpoint %x %y]'"} + +bind .r "<ButtonPress-3>" "press %x %y motion" +bind .r "<ButtonRelease-3>" release + +bind .r "<Shift-ButtonPress-3>" "press %x %y zoom" +bind .r "<Shift-ButtonRelease-3>" release + +bind .r "<Control-ButtonPress-3>" "press %x %y rotate" +bind .r "<Control-ButtonRelease-3>" release + +.r bind current "<Enter>" showbox +.r bind current "<Leave>" {hidebox %x %y} |