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app: make GimpOverlayFrame work as standalone container 

Implement size_request() and size_allocate() so it can be used to pack
an arbitrary widget without the need for being subclassed.
This commit is contained in:
Michael Natterer 2010-06-12 19:23:22 +02:00
parent cabc3aa67a
commit fc3a89ab0e
1 changed files with 61 additions and 8 deletions
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69
app/widgets/gimpoverlayframe.c
View File

@ -27,8 +27,12 @@
#include "gimpoverlayframe.h"
static gboolean gimp_overlay_frame_expose (GtkWidget *widget,
GdkEventExpose *eevent);
static void gimp_overlay_frame_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gimp_overlay_frame_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gimp_overlay_frame_expose (GtkWidget *widget,
GdkEventExpose *eevent);
G_DEFINE_TYPE (GimpOverlayFrame, gimp_overlay_frame, GTK_TYPE_BIN)
@ -41,7 +45,9 @@ gimp_overlay_frame_class_init (GimpOverlayFrameClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
widget_class->expose_event = gimp_overlay_frame_expose;
widget_class->size_request = gimp_overlay_frame_size_request;
widget_class->size_allocate = gimp_overlay_frame_size_allocate;
widget_class->expose_event = gimp_overlay_frame_expose;
}
static void
@ -62,6 +68,58 @@ gimp_overlay_frame_init (GimpOverlayFrame *frame)
gtk_widget_set_app_paintable (widget, TRUE);
}
static void
gimp_overlay_frame_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkContainer *container = GTK_CONTAINER (widget);
GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
GtkRequisition child_requisition;
gint border_width;
border_width = gtk_container_get_border_width (container);
requisition->width = border_width * 2;
requisition->height = border_width * 2;
if (child && gtk_widget_get_visible (child))
{
gtk_widget_size_request (child, &child_requisition);
}
else
{
child_requisition.width = 0;
child_requisition.height = 0;
}
requisition->width += child_requisition.width;
requisition->height += child_requisition.height;
}
static void
gimp_overlay_frame_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkContainer *container = GTK_CONTAINER (widget);
GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
GtkAllocation child_allocation;
gint border_width;
gtk_widget_set_allocation (widget, allocation);
border_width = gtk_container_get_border_width (container);
if (child && gtk_widget_get_visible (child))
{
child_allocation.x = allocation->x + border_width;
child_allocation.y = allocation->y + border_width;
child_allocation.width = MAX (allocation->width - 2 * border_width, 0);
child_allocation.height = MAX (allocation->height - 2 * border_width, 0);
gtk_widget_size_allocate (child, &child_allocation);
}
}
static gboolean
gimp_overlay_frame_expose (GtkWidget *widget,
GdkEventExpose *eevent)
@ -70,17 +128,12 @@ gimp_overlay_frame_expose (GtkWidget *widget,
GtkStyle *style;
GtkAllocation allocation;
gint border_width;
gint inner_width;
gint inner_height;
style = gtk_widget_get_style (widget);
gtk_widget_get_allocation (widget, &allocation);
border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
inner_width = allocation.width - border_width / 2;
inner_height = allocation.height - border_width / 2;
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
gdk_cairo_region (cr, eevent->region);
cairo_clip_preserve (cr);