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gimp/libgimpwidgets/gimpframe.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpframe.c
* Copyright (C) 2004 Sven Neumann <sven@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "gimpwidgetstypes.h"
#include "gimpframe.h"
#define DEFAULT_LABEL_SPACING 6
#define DEFAULT_LABEL_BOLD TRUE
#define GIMP_FRAME_INDENT_KEY "gimp-frame-indent"
#define GIMP_FRAME_IN_EXPANDER_KEY "gimp-frame-in-expander"
static void gimp_frame_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gimp_frame_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gimp_frame_child_allocate (GtkFrame *frame,
GtkAllocation *allocation);
static void gimp_frame_style_set (GtkWidget *widget,
GtkStyle *previous);
static gboolean gimp_frame_expose_event (GtkWidget *widget,
GdkEventExpose *event);
static void gimp_frame_label_widget_notify (GtkFrame *frame);
static gint gimp_frame_get_indent (GtkWidget *widget);
static gint gimp_frame_get_label_spacing (GtkFrame *frame);
G_DEFINE_TYPE (GimpFrame, gimp_frame, GTK_TYPE_FRAME);
#define parent_class gimp_frame_parent_class
static void
gimp_frame_class_init (GimpFrameClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkFrameClass *frame_class = GTK_FRAME_CLASS (klass);
widget_class->size_request = gimp_frame_size_request;
widget_class->size_allocate = gimp_frame_size_allocate;
widget_class->style_set = gimp_frame_style_set;
widget_class->expose_event = gimp_frame_expose_event;
frame_class->compute_child_allocation = gimp_frame_child_allocate;
gtk_widget_class_install_style_property (widget_class,
g_param_spec_boolean ("label-bold",
NULL, NULL,
DEFAULT_LABEL_BOLD,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("label-spacing",
NULL, NULL,
0,
G_MAXINT,
DEFAULT_LABEL_SPACING,
G_PARAM_READABLE));
}
static void
gimp_frame_init (GimpFrame *frame)
{
g_signal_connect (frame, "notify::label-widget",
G_CALLBACK (gimp_frame_label_widget_notify),
NULL);
}
static void
gimp_frame_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkFrame *frame = GTK_FRAME (widget);
GtkBin *bin = GTK_BIN (widget);
GtkRequisition child_requisition;
if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
{
gtk_widget_size_request (frame->label_widget, requisition);
}
else
{
requisition->width = 0;
requisition->height = 0;
}
requisition->height += gimp_frame_get_label_spacing (frame);
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
gint indent = gimp_frame_get_indent (widget);
gtk_widget_size_request (bin->child, &child_requisition);
requisition->width = MAX (requisition->width,
child_requisition.width + indent);
requisition->height += child_requisition.height;
}
requisition->width += 2 * GTK_CONTAINER (widget)->border_width;
requisition->height += 2 * GTK_CONTAINER (widget)->border_width;
}
static void
gimp_frame_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkFrame *frame = GTK_FRAME (widget);
GtkBin *bin = GTK_BIN (widget);
widget->allocation = *allocation;
gimp_frame_child_allocate (frame, &frame->child_allocation);
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
gtk_widget_size_allocate (bin->child, &frame->child_allocation);
if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
{
GtkAllocation label_allocation;
GtkRequisition label_requisition;
gint border = GTK_CONTAINER (widget)->border_width;
gtk_widget_get_child_requisition (frame->label_widget,
&label_requisition);
label_allocation.x = allocation->x + border;
label_allocation.y = allocation->y + border;
label_allocation.width = MAX (label_requisition.width,
allocation->width - 2 * border);
label_allocation.height = label_requisition.height;
gtk_widget_size_allocate (frame->label_widget, &label_allocation);
}
}
static void
gimp_frame_child_allocate (GtkFrame *frame,
GtkAllocation *child_allocation)
{
GtkWidget *widget = GTK_WIDGET (frame);
GtkAllocation *allocation = &widget->allocation;
gint border = GTK_CONTAINER (frame)->border_width;
gint spacing = 0;
gint indent = gimp_frame_get_indent (widget);
if (frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget))
{
GtkRequisition child_requisition;
gtk_widget_get_child_requisition (frame->label_widget,
&child_requisition);
spacing += child_requisition.height;
}
spacing += gimp_frame_get_label_spacing (frame);
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR)
child_allocation->x = border + indent;
else
child_allocation->x = border;
child_allocation->y = border + spacing;
child_allocation->width = MAX (1,
allocation->width - 2 * border - indent);
child_allocation->height = MAX (1,
allocation->height -
child_allocation->y - border);
child_allocation->x += allocation->x;
child_allocation->y += allocation->y;
}
static void
gimp_frame_style_set (GtkWidget *widget,
GtkStyle *previous)
{
/* font changes invalidate the indentation */
g_object_set_data (G_OBJECT (widget), GIMP_FRAME_INDENT_KEY, NULL);
/* for "label_bold" */
gimp_frame_label_widget_notify (GTK_FRAME (widget));
}
static gboolean
gimp_frame_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
if (GTK_WIDGET_DRAWABLE (widget))
{
GtkWidgetClass *widget_class = g_type_class_peek_parent (parent_class);
return widget_class->expose_event (widget, event);
}
return FALSE;
}
static void
gimp_frame_label_widget_notify (GtkFrame *frame)
{
if (frame->label_widget)
{
GtkLabel *label = NULL;
if (GTK_IS_LABEL (frame->label_widget))
{
label = GTK_LABEL (frame->label_widget);
gtk_misc_set_alignment (GTK_MISC (label),
frame->label_xalign, frame->label_yalign);
}
else if (GTK_IS_BIN (frame->label_widget))
{
GtkWidget *child = gtk_bin_get_child (GTK_BIN (frame->label_widget));
if (GTK_IS_LABEL (child))
label = GTK_LABEL (child);
}
if (label)
{
PangoAttrList *attrs = pango_attr_list_new ();
PangoAttribute *attr;
gboolean bold;
gtk_widget_style_get (GTK_WIDGET (frame), "label_bold", &bold, NULL);
attr = pango_attr_weight_new (bold ?
PANGO_WEIGHT_BOLD :
PANGO_WEIGHT_NORMAL);
attr->start_index = 0;
attr->end_index = -1;
pango_attr_list_insert (attrs, attr);
gtk_label_set_attributes (label, attrs);
pango_attr_list_unref (attrs);
}
}
}
static gint
gimp_frame_get_indent (GtkWidget *widget)
{
gint width = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget),
GIMP_FRAME_INDENT_KEY));
if (! width)
{
PangoLayout *layout;
/* the HIG suggests to use four spaces so do just that */
layout = gtk_widget_create_pango_layout (widget, " ");
pango_layout_get_pixel_size (layout, &width, NULL);
g_object_unref (layout);
g_object_set_data (G_OBJECT (widget),
GIMP_FRAME_INDENT_KEY, GINT_TO_POINTER (width));
}
return width;
}
static gint
gimp_frame_get_label_spacing (GtkFrame *frame)
{
gint spacing = 0;
if ((frame->label_widget && GTK_WIDGET_VISIBLE (frame->label_widget)) ||
(g_object_get_data (G_OBJECT (frame), GIMP_FRAME_IN_EXPANDER_KEY)))
{
gtk_widget_style_get (GTK_WIDGET (frame),
"label_spacing", &spacing,
NULL);
}
return spacing;
}
/**
* gimp_frame_new:
* @label: text to set as the frame's title label (or %NULL for no title)
*
* Creates a #GimpFrame widget. A #GimpFrame is a HIG-compliant
* variant of #GtkFrame. It doesn't render a frame at all but
* otherwise behaves like a frame. The frame's title is rendered in
* bold and the frame content is indented four spaces as suggested by
* the GNOME HIG (see http://developer.gnome.org/projects/gup/hig/).
*
* Return value: a new #GimpFrame widget
*
* Since: GIMP 2.2
**/
GtkWidget *
gimp_frame_new (const gchar *label)
{
GtkWidget *frame;
gboolean expander = FALSE;
/* somewhat hackish, should perhaps be an object property of GimpFrame */
if (label && strcmp (label, "<expander>") == 0)
{
expander = TRUE;
label = NULL;
}
frame = g_object_new (GIMP_TYPE_FRAME,
"label", label,
NULL);
if (expander)
g_object_set_data (G_OBJECT (frame),
GIMP_FRAME_IN_EXPANDER_KEY, (gpointer) TRUE);
return frame;
}
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