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Bug 773334 - GimpColorScale's scrolling behaviour is inverted...

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...(scroll up decreases the value)

Implement GtkWidget::scroll_event() and turn GDK_SCROLL_UP into RIGHT
and DOWN into LEFT. The default behaviour or good for scrollbars but
not for widgets where "right" == "higher value" == "up" like
GimpColorScale.
This commit is contained in:
Michael Natterer 2016-10-23 18:35:57 +02:00
parent 5ce223b552
commit 8e65aca452
1 changed files with 39 additions and 0 deletions
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39
libgimpwidgets/gimpcolorscale.c
View file

@ -87,6 +87,8 @@ static gboolean gimp_color_scale_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gimp_color_scale_button_release (GtkWidget *widget,
GdkEventButton *event);
static gboolean gimp_color_scale_scroll (GtkWidget *widget,
GdkEventScroll *event);
static gboolean gimp_color_scale_expose (GtkWidget *widget,
GdkEventExpose *event);
@ -118,6 +120,7 @@ gimp_color_scale_class_init (GimpColorScaleClass *klass)
widget_class->state_changed = gimp_color_scale_state_changed;
widget_class->button_press_event = gimp_color_scale_button_press;
widget_class->button_release_event = gimp_color_scale_button_release;
widget_class->scroll_event = gimp_color_scale_scroll;
widget_class->expose_event = gimp_color_scale_expose;
/**
@ -354,6 +357,42 @@ gimp_color_scale_button_release (GtkWidget *widget,
return GTK_WIDGET_CLASS (parent_class)->button_release_event (widget, event);
}
static gboolean
gimp_color_scale_scroll (GtkWidget *widget,
GdkEventScroll *event)
{
if (gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)) ==
GTK_ORIENTATION_HORIZONTAL)
{
GdkEventScroll *my_event;
gboolean retval;
my_event = (GdkEventScroll *) gdk_event_copy ((GdkEvent *) event);
switch (my_event->direction)
{
case GDK_SCROLL_UP:
my_event->direction = GDK_SCROLL_RIGHT;
break;
case GDK_SCROLL_DOWN:
my_event->direction = GDK_SCROLL_LEFT;
break;
default:
break;
}
retval = GTK_WIDGET_CLASS (parent_class)->scroll_event (widget, my_event);
gdk_event_free ((GdkEvent *) my_event);
return retval;
}
return GTK_WIDGET_CLASS (parent_class)->scroll_event (widget, event);
}
static gboolean
gimp_color_scale_expose (GtkWidget *widget,
GdkEventExpose *event)