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gitk: Work around empty back and forward images when buttons are disabled

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On Mac, the back and forward buttons show an empty rectange instead of
a grayed-out arrow when they are disabled. The reason is a Tk bug on Mac
that causes disabled images not to draw correctly (not to draw at all,
that is); see
<https://groups.google.com/forum/?fromgroups=#!topic/comp.lang.tcl/V-nW1JBq0eU>.

To work around this, we explicitly provide gray images for the disabled
state; I think this looks better than the default stipple effect that you
get on Windows as well, but that may be a matter of taste.

Signed-off-by: Stefan Haller <stefan@haller-berlin.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Stefan Haller 2012-09-22 09:46:48 +02:00 committed by Paul Mackerras
parent 30441a6f2d
commit f062e50fe6
1 changed files with 11 additions and 6 deletions
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@ -2161,7 +2161,7 @@ proc makewindow {} {
trace add variable sha1string write sha1change
pack $sha1entry -side left -pady 2
image create bitmap bm-left -data {
set bm_left_data {
#define left_width 16
#define left_height 16
static unsigned char left_bits[] = {
@ -2169,7 +2169,7 @@ proc makewindow {} {
0x0e, 0x00, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0x7f, 0x0e, 0x00, 0x1c, 0x00,
0x38, 0x00, 0x70, 0x00, 0xe0, 0x00, 0xc0, 0x01};
}
image create bitmap bm-right -data {
set bm_right_data {
#define right_width 16
#define right_height 16
static unsigned char right_bits[] = {
@ -2177,11 +2177,16 @@ proc makewindow {} {
0x00, 0x38, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0x7f, 0x00, 0x38, 0x00, 0x1c,
0x00, 0x0e, 0x00, 0x07, 0x80, 0x03, 0xc0, 0x01};
}
${NS}::button .tf.bar.leftbut -image bm-left -command goback \
-state disabled -width 26
image create bitmap bm-left -data $bm_left_data
image create bitmap bm-left-gray -data $bm_left_data -foreground "#999"
image create bitmap bm-right -data $bm_right_data
image create bitmap bm-right-gray -data $bm_right_data -foreground "#999"
${NS}::button .tf.bar.leftbut -image [list bm-left disabled bm-left-gray] \
-command goback -state disabled -width 26
pack .tf.bar.leftbut -side left -fill y
${NS}::button .tf.bar.rightbut -image bm-right -command goforw \
-state disabled -width 26
${NS}::button .tf.bar.rightbut -image [list bm-right disabled bm-right-gray] \
-command goforw -state disabled -width 26
pack .tf.bar.rightbut -side left -fill y
${NS}::label .tf.bar.rowlabel -text [mc "Row"]