AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity

GtkWidget: Add ::pick vmethod

Browse Source 
The default implementation iterates through all children, so should suffice
for most widgets.
This commit is contained in:
Carlos Garnacho 2017-05-12 12:33:58 +02:00
parent fee289cd06
commit 9c97bf0c02
2 changed files with 80 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

74
gtk/gtkwidget.c
View File

@ -947,6 +947,78 @@ gtk_widget_real_snapshot (GtkWidget *widget,
/* nothing to do here */
}
static void
transform_to_child_coords (GtkWidget *widget,
GtkWidget *child,
gdouble x,
gdouble y,
gdouble *x_out,
gdouble *y_out)
{
GtkAllocation alloc, child_alloc;
GdkWindow *window;
gdouble dx = 0, dy = 0;
gtk_widget_get_allocation (widget, &alloc);
gtk_widget_get_allocation (child, &child_alloc);
child_alloc.x -= alloc.x;
child_alloc.y -= alloc.y;
window = _gtk_widget_get_window (child);
while (window != _gtk_widget_get_window (widget))
{
gdk_window_coords_to_parent (window, dx, dy, &dx, &dy);
window = gdk_window_get_parent (window);
}
*x_out = x - child_alloc.x - dx;
*y_out = y - child_alloc.y - dy;
}
static GtkWidget *
gtk_widget_real_pick (GtkWidget *widget,
gdouble x,
gdouble y,
gdouble *x_out,
gdouble *y_out)
{
GtkAllocation allocation, parent_allocation;
GtkWidget *child;
gtk_widget_get_allocation (widget, &parent_allocation);
for (child = _gtk_widget_get_last_child (widget);
child;
child = _gtk_widget_get_prev_sibling (child))
{
gdouble tx = x, ty = y;
if (!gtk_widget_is_sensitive (child) ||
!gtk_widget_is_drawable (child))
continue;
transform_to_child_coords (widget, child, tx, ty, &tx, &ty);
_gtk_widget_get_allocation (child, &allocation);
allocation.x = 0;
allocation.y = 0;
if (gdk_rectangle_contains_point (&allocation, tx, ty))
{
if (x_out && y_out)
{
*x_out = tx;
*y_out = ty;
}
return child;
}
}
return NULL;
}
static void
gtk_widget_class_init (GtkWidgetClass *klass)
{
@ -1061,6 +1133,8 @@ gtk_widget_class_init (GtkWidgetClass *klass)
klass->queue_draw_region = gtk_widget_real_queue_draw_region;
klass->queue_draw_child = gtk_widget_real_queue_draw_child;
klass->pick = gtk_widget_real_pick;
widget_props[PROP_NAME] =
g_param_spec_string ("name",
P_("Widget name"),

6
gtk/gtkwidget.h
View File

@ -480,6 +480,12 @@ struct _GtkWidgetClass
void (* snapshot) (GtkWidget *widget,
GtkSnapshot *snapshot);
GtkWidget * (* pick) (GtkWidget *widget,
gdouble x,
gdouble y,
gdouble *x_out,
gdouble *y_out);
/*< private >*/
GtkWidgetClassPrivate *priv;