+# -*- Tcl -*-
+# Tcl panner widget
+
+# This is part of ypp-sc-tools, a set of third-party tools for assisting
+# players of Yohoho Puzzle Pirates.
+#
+# Copyright (C) 2009 Ian Jackson <ijackson@chiark.greenend.org.uk>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# Yohoho and Puzzle Pirates are probably trademarks of Three Rings and
+# are used without permission. This program is not endorsed or
+# sponsored by Three Rings.
+
+
package provide panner 0.1;
namespace eval panner {
-namespace export -clear
-
proc pannerproc {name argl body} {
proc $name [concat w $argl] "
upvar panner::i/\$w d
$body
"
}
-proc pannerproc-export {name argl body} {
- pannerproc panner-$name $argl $body
- namespace export panner-$name
-}
-
-proc debug {w m} {
+pannerproc _debug {m {minlevel 1}} {
+ if {$d(debug) < $minlevel} return
puts "PANNER $w $m"
}
-pannerproc-export create {canvas maxwidth maxheight} {
- debug $w "create $canvas $maxwidth,$maxheight"
+pannerproc create {canvas maxwidth maxheight {debug 0}} {
+ set d(debug) $debug
+ _debug $w "create $canvas $maxwidth,$maxheight"
set d(maxwidth) $maxwidth
set d(maxheight) $maxheight
canvas $w
$w create rectangle -5 -5 -5 -5 -tags base -outline {} -fill black
$w create rectangle -5 -5 -5 -5 -tags core -outline blue
- bind $w <Configure> [list panner::resize $w]
- panner-setcanvas $w $canvas
+ bind $w <Configure> [list panner::_resize $w w-event]
+ bind $w <ButtonPress> [list panner::_press $w %b %x %y]
+ bind $w <B1-Motion> [list panner::_motion $w %x %y]
+ bind $w <B1-ButtonRelease> [list panner::_release $w %x %y]
+ setcanvas $w $canvas
}
-pannerproc-export setcolor-background {c} { $w configure -background $c }
-pannerproc-export setcolor-base {c} { $w itemconfigure base -fill $c }
-pannerproc-export setcolor-core {c} { $w itemconfigure core -outline $c }
+pannerproc setcolor-background {c} { $w configure -background $c }
+pannerproc setcolor-base {c} { $w itemconfigure base -fill $c }
+pannerproc setcolor-core {c} { $w itemconfigure core -outline $c }
proc canvas-scroll-bbox {canvas} {
$canvas configure -scrollregion [$canvas bbox all]
}
namespace export canvas-scroll-bbox
-pannerproc-export destroy {w} {
- debug $w "destroy"
- panner-disable $w
- bind $d(canvas) <Configure> {}
+pannerproc destroy {w} {
+ _debug $w "destroy"
+ disable $w
destroy $w
+ _debug $w "destroyed"
unset d
- debug $w "destroyed"
}
-pannerproc-export disable {} {
- debug $w "disable"
+pannerproc disable {} {
+ _debug $w "disable"
if {[info exists d(canvas)]} {
- debug $w "disable unbind"
- bind $d(canvas) <Configure> [list panner::resize $w]
+ _debug $w "disable unbind"
+ bind $d(canvas) <Configure> {}
unset d(canvas)
}
set d(enabled) 0
- noshow $w
+ _noshow $w
}
-pannerproc noshow {} {
- debug $w " noshow"
+pannerproc _noshow {} {
+ _debug $w " _noshow"
$w coords base -5 -5 -5 -5
$w coords core -5 -5 -5 -5
}
-pannerproc-export setcanvas {canvas} {
- debug $w "setcanvas $canvas"
- panner-disable $w
+pannerproc setcanvas {canvas} {
+ _debug $w "setcanvas $canvas"
+ disable $w
set d(canvas) $canvas
- panner-updatecanvas $w
+ bind $d(canvas) <Configure> [list panner::_resize $w c-event]
+ updatecanvas $w
}
proc manyset {list args} {
}
}
-pannerproc-export updatecanvas-bbox {} {
+pannerproc updatecanvas-bbox {} {
canvas-scroll-bbox $d(canvas)
- panner-updatecanvas $w
+ updatecanvas $w
}
-pannerproc-export updatecanvas {} {
+pannerproc updatecanvas {} {
set d(bbox) [$d(canvas) cget -scrollregion]
+ if {[llength $d(bbox)] < 4} { set d(enabled) 0; _noshow $w; return }
+
manyset $d(bbox) x1 y1 x2 y2
set d(cwidth) [expr {$x2-$x1}]
set d(cheight) [expr {$y2-$y1}]
- debug $w "updatecanvas bbox=[join $d(bbox) ,] c=$d(cwidth),$d(cheight)"
+ _debug $w "updatecanvas bbox=[join $d(bbox) ,] c=$d(cwidth),$d(cheight)"
set d(enabled) [expr {$d(cwidth) && $d(cheight)}]
- if {!$d(enabled)} { noshow $w; return }
+ if {!$d(enabled)} { _noshow $w; return }
# here we only set the pager's _requested_ height
set caspect [expr {($x2-$x1) * 1.0 / ($y2-$y1)}]
set reqw $d(maxwidth)
set reqh [expr {$d(maxwidth) * $caspect}]
}
- debug $w "updatecanvas aspects=$caspect,$waspect too=$too req=$reqw,$reqh"
+ _debug $w "updatecanvas aspects=$caspect,$waspect too=$too req=$reqw,$reqh"
$w configure -width $reqw -height $reqh
- resize $w
+ _resize $w c-update
}
-pannerproc resize {} {
- noshow $w
-
- #set d(vwidth) [winfo width $d(canvas)]
- #set d(vheight) [winfo height $d(canvas)]
+pannerproc _resize {why} {
+ _noshow $w
set d(wwidth) [winfo width $w]
set d(wheight) [winfo height $w]
- debug $w "resize w=$d(wwidth),$d(wheight)"
+
+ _debug $w "_resize $why w=$d(wwidth),$d(wheight)"
if {!$d(enabled) || $d(wwidth)<2 || $d(wheight)<2} return
set hscale [expr {$d(wwidth) * 1.0 / $d(cwidth)}]
set vscale [expr {$d(wheight) * 1.0 / $d(cheight)}]
- set scale [expr {$hscale < $vscale ? $hscale : $vscale}]
- set d(mul_xview) [expr {$d(cwidth) * $scale}]
- set d(mul_yview) [expr {$d(cheight) * $scale}]
+ set d(scale) [expr {$hscale < $vscale ? $hscale : $vscale}]
+ set d(mul_xview) [expr {$d(cwidth) * $d(scale)}]
+ set d(mul_yview) [expr {$d(cheight) * $d(scale)}]
- set corewidth [expr {$scale * $d(cwidth)}]
- set coreheight [expr {$scale * $d(cheight)}]
+ set corewidth [expr {$d(scale) * $d(cwidth)}]
+ set coreheight [expr {$d(scale) * $d(cheight)}]
set d(add_xview) [expr {0.5 * ($d(wwidth) - $corewidth)}]
set d(add_yview) [expr {0.5 * ($d(wheight) - $coreheight)}]
[expr {$corewidth + $d(add_xview)}] \
[expr {$coreheight + $d(add_yview)}]
- debug $w "resize scales=$hscale,$vscale scale=$scale\
+ _debug $w "_resize scales=$hscale,$vscale scale=$d(scale)\
mul=$d(mul_xview),$d(mul_yview)\
add=$d(add_xview),$d(add_yview)\
coresz=$corewidth,$coreheight"
- redisplay $w
+ _redisplay $w
}
-pannerproc mapc {view which} {
+pannerproc _mapc {view which} {
set viewpos [lindex [$d(canvas) $view] $which]
set r [expr {$viewpos * $d(mul_$view) + $d(add_$view)}]
- debug $w " mapc $view wh=$which viewpos=$viewpos => $r"
+ _debug $w " _mapc $view wh=$which viewpos=$viewpos => $r" 2
return $r
}
-pannerproc redisplay {} {
- debug $w "redisplay"
+pannerproc _redisplay {} {
+ _debug $w "_redisplay" 2
$w coords core \
- [mapc $w xview 0] \
- [mapc $w yview 0] \
- [mapc $w xview 1] \
- [mapc $w yview 1]
+ [_mapc $w xview 0] \
+ [_mapc $w yview 0] \
+ [_mapc $w xview 1] \
+ [_mapc $w yview 1]
+}
+
+pannerproc _press {b x y} {
+ if {$b != 1} return
+ set d(down_x) $x
+ set d(down_y) $y
+ set d(down_xview) [lindex [$d(canvas) xview] 0]
+ set d(down_yview) [lindex [$d(canvas) yview] 0]
+ _debug $w "_press down=$x,$y view=$d(down_xview),$d(down_yview)"
+}
+
+pannerproc _motion {x y} {
+ if {![info exists d(down_x)]} return
+ foreach xy {x y} wh {width height} {
+ set newpos [expr {
+ ([set $xy] - $d(down_$xy)) / $d(scale) / $d(c$wh)
+ + $d(down_${xy}view)
+ }]
+ $d(canvas) ${xy}view moveto $newpos
+ lappend dl $newpos
+ }
+ _debug $w "_motion $x,$y [join $dl ,]" 2
+ _redisplay $w
+}
+
+pannerproc _release {x y} {
+ _debug $w "_release $x,$y"
+ _motion $w $x $y
+ catch { unset d(down_x) }
}
}
~yarrgweb / ypp-sc-tools.db-live.git / blobdiff