e522ad46ba
Some minor improvements to rounding in aspectframes. Make sure that child allocation is always >= 0 Always trigger size allocation with gtk_widget_queue_resize to prevent calling size_allocate before allocation done. gtk/gtkframe.c: Changed tests for drawability to GTK_WIDGET_DRAWABLE Always trigger size allocation with gtk_widget_queue_resize to prevent calling size_allocate before allocation done.
419 lines
12 KiB
C
419 lines
12 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "gtkframe.h"
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static void gtk_frame_class_init (GtkFrameClass *klass);
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static void gtk_frame_init (GtkFrame *frame);
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static void gtk_frame_destroy (GtkObject *object);
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static void gtk_frame_paint (GtkWidget *widget,
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GdkRectangle *area);
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static void gtk_frame_draw (GtkWidget *widget,
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GdkRectangle *area);
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static gint gtk_frame_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static void gtk_frame_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_frame_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static GtkBinClass *parent_class = NULL;
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guint
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gtk_frame_get_type ()
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{
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static guint frame_type = 0;
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if (!frame_type)
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{
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GtkTypeInfo frame_info =
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{
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"GtkFrame",
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sizeof (GtkFrame),
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sizeof (GtkFrameClass),
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(GtkClassInitFunc) gtk_frame_class_init,
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(GtkObjectInitFunc) gtk_frame_init,
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(GtkArgFunc) NULL,
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};
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frame_type = gtk_type_unique (gtk_bin_get_type (), &frame_info);
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}
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return frame_type;
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}
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static void
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gtk_frame_class_init (GtkFrameClass *class)
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{
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GtkObjectClass *object_class;
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GtkWidgetClass *widget_class;
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object_class = (GtkObjectClass*) class;
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widget_class = (GtkWidgetClass*) class;
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parent_class = gtk_type_class (gtk_bin_get_type ());
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object_class->destroy = gtk_frame_destroy;
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widget_class->draw = gtk_frame_draw;
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widget_class->expose_event = gtk_frame_expose;
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widget_class->size_request = gtk_frame_size_request;
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widget_class->size_allocate = gtk_frame_size_allocate;
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}
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static void
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gtk_frame_init (GtkFrame *frame)
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{
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GTK_WIDGET_SET_FLAGS (frame, GTK_BASIC);
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frame->label = NULL;
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frame->shadow_type = GTK_SHADOW_ETCHED_IN;
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frame->label_width = 0;
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frame->label_height = 0;
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frame->label_xalign = 0.0;
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frame->label_yalign = 0.5;
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}
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GtkWidget*
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gtk_frame_new (const gchar *label)
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{
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GtkFrame *frame;
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frame = gtk_type_new (gtk_frame_get_type ());
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gtk_frame_set_label (frame, label);
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return GTK_WIDGET (frame);
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}
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void
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gtk_frame_set_label (GtkFrame *frame,
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const gchar *label)
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{
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g_return_if_fail (frame != NULL);
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g_return_if_fail (GTK_IS_FRAME (frame));
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if ((label && frame->label && (strcmp (frame->label, label) == 0)) ||
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(!label && !frame->label))
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return;
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if (frame->label)
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g_free (frame->label);
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frame->label = NULL;
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if (label)
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{
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frame->label = g_strdup (label);
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frame->label_width = gdk_string_measure (GTK_WIDGET (frame)->style->font, frame->label) + 7;
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frame->label_height = (GTK_WIDGET (frame)->style->font->ascent +
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GTK_WIDGET (frame)->style->font->descent + 1);
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}
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else
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{
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frame->label_width = 0;
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frame->label_height = 0;
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}
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if (GTK_WIDGET_DRAWABLE (frame))
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{
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GtkWidget *widget;
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/* clear the old label area
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*/
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widget = GTK_WIDGET (frame);
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gdk_window_clear_area (widget->window,
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widget->allocation.x + GTK_CONTAINER (frame)->border_width,
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widget->allocation.y + GTK_CONTAINER (frame)->border_width,
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widget->allocation.width - GTK_CONTAINER (frame)->border_width,
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widget->allocation.y + frame->label_height);
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}
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gtk_widget_queue_resize (GTK_WIDGET (frame));
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}
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void
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gtk_frame_set_label_align (GtkFrame *frame,
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gfloat xalign,
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gfloat yalign)
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{
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g_return_if_fail (frame != NULL);
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g_return_if_fail (GTK_IS_FRAME (frame));
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xalign = CLAMP (xalign, 0.0, 1.0);
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yalign = CLAMP (yalign, 0.0, 1.0);
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if ((xalign != frame->label_xalign) || (yalign != frame->label_yalign))
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{
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frame->label_xalign = xalign;
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frame->label_yalign = yalign;
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if (GTK_WIDGET_DRAWABLE (frame))
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{
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GtkWidget *widget;
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/* clear the old label area
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*/
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widget = GTK_WIDGET (frame);
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gdk_window_clear_area (widget->window,
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widget->allocation.x + GTK_CONTAINER (frame)->border_width,
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widget->allocation.y + GTK_CONTAINER (frame)->border_width,
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widget->allocation.width - GTK_CONTAINER (frame)->border_width,
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widget->allocation.y + frame->label_height);
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}
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gtk_widget_queue_resize (GTK_WIDGET (frame));
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}
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}
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void
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gtk_frame_set_shadow_type (GtkFrame *frame,
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GtkShadowType type)
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{
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g_return_if_fail (frame != NULL);
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g_return_if_fail (GTK_IS_FRAME (frame));
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if ((GtkShadowType) frame->shadow_type != type)
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{
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frame->shadow_type = type;
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if (GTK_WIDGET_DRAWABLE (frame))
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{
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gdk_window_clear_area (GTK_WIDGET (frame)->window,
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GTK_WIDGET (frame)->allocation.x,
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GTK_WIDGET (frame)->allocation.y,
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GTK_WIDGET (frame)->allocation.width,
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GTK_WIDGET (frame)->allocation.height);
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}
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gtk_widget_queue_resize (GTK_WIDGET (frame));
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}
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}
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static void
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gtk_frame_destroy (GtkObject *object)
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{
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GtkFrame *frame;
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g_return_if_fail (object != NULL);
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g_return_if_fail (GTK_IS_FRAME (object));
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frame = GTK_FRAME (object);
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if (frame->label)
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g_free (frame->label);
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
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}
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static void
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gtk_frame_paint (GtkWidget *widget,
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GdkRectangle *area)
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{
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GtkFrame *frame;
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GtkStateType state;
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gint height_extra;
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gint label_area_width;
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gint x, y;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_FRAME (widget));
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g_return_if_fail (area != NULL);
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if (GTK_WIDGET_DRAWABLE (widget))
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{
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frame = GTK_FRAME (widget);
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state = widget->state;
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if (!GTK_WIDGET_IS_SENSITIVE (widget))
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state = GTK_STATE_INSENSITIVE;
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height_extra = frame->label_height - widget->style->klass->xthickness;
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height_extra = MAX (height_extra, 0);
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x = GTK_CONTAINER (frame)->border_width;
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y = GTK_CONTAINER (frame)->border_width;
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gtk_draw_shadow (widget->style, widget->window,
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GTK_STATE_NORMAL, frame->shadow_type,
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widget->allocation.x + x,
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widget->allocation.y + y + height_extra / 2,
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widget->allocation.width - x * 2,
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widget->allocation.height - y * 2 - height_extra / 2);
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if (frame->label)
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{
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label_area_width = (widget->allocation.width -
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GTK_CONTAINER (frame)->border_width * 2 -
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widget->style->klass->xthickness * 2);
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x = ((label_area_width - frame->label_width) * frame->label_xalign +
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GTK_CONTAINER (frame)->border_width + widget->style->klass->xthickness);
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y = (GTK_CONTAINER (frame)->border_width + widget->style->font->ascent);
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gdk_window_clear_area (widget->window,
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widget->allocation.x + x + 2,
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widget->allocation.y + GTK_CONTAINER (frame)->border_width,
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frame->label_width - 4,
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frame->label_height);
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gtk_draw_string (widget->style, widget->window, state,
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widget->allocation.x + x + 3,
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widget->allocation.y + y,
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frame->label);
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}
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}
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}
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static void
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gtk_frame_draw (GtkWidget *widget,
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GdkRectangle *area)
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{
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GtkBin *bin;
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GdkRectangle child_area;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_FRAME (widget));
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g_return_if_fail (area != NULL);
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if (GTK_WIDGET_DRAWABLE (widget))
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{
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bin = GTK_BIN (widget);
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gtk_frame_paint (widget, area);
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if (bin->child && gtk_widget_intersect (bin->child, area, &child_area))
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gtk_widget_draw (bin->child, &child_area);
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}
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}
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static gint
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gtk_frame_expose (GtkWidget *widget,
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GdkEventExpose *event)
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{
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GtkBin *bin;
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GdkEventExpose child_event;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_FRAME (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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if (GTK_WIDGET_DRAWABLE (widget))
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{
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bin = GTK_BIN (widget);
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gtk_frame_paint (widget, &event->area);
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child_event = *event;
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if (bin->child &&
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GTK_WIDGET_NO_WINDOW (bin->child) &&
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gtk_widget_intersect (bin->child, &event->area, &child_event.area))
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gtk_widget_event (bin->child, (GdkEvent*) &child_event);
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}
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return FALSE;
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}
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static void
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gtk_frame_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkFrame *frame;
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GtkBin *bin;
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gint tmp_height;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_FRAME (widget));
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g_return_if_fail (requisition != NULL);
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frame = GTK_FRAME (widget);
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bin = GTK_BIN (widget);
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requisition->width = (GTK_CONTAINER (widget)->border_width +
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GTK_WIDGET (widget)->style->klass->xthickness) * 2;
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tmp_height = frame->label_height - GTK_WIDGET (widget)->style->klass->ythickness;
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tmp_height = MAX (tmp_height, 0);
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requisition->height = tmp_height + (GTK_CONTAINER (widget)->border_width +
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GTK_WIDGET (widget)->style->klass->ythickness) * 2;
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if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
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{
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gtk_widget_size_request (bin->child, &bin->child->requisition);
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requisition->width += MAX (bin->child->requisition.width, frame->label_width);
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requisition->height += bin->child->requisition.height;
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}
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else
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{
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requisition->width += frame->label_width;
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}
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}
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static void
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gtk_frame_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkFrame *frame;
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GtkBin *bin;
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GtkAllocation child_allocation;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_FRAME (widget));
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g_return_if_fail (allocation != NULL);
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frame = GTK_FRAME (widget);
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bin = GTK_BIN (widget);
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if (GTK_WIDGET_MAPPED (widget) &&
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((widget->allocation.x != allocation->x) ||
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(widget->allocation.y != allocation->y) ||
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(widget->allocation.width != allocation->width) ||
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(widget->allocation.height != allocation->height)) &&
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(widget->allocation.width != 0) &&
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(widget->allocation.height != 0))
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gdk_window_clear_area (widget->window,
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widget->allocation.x,
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widget->allocation.y,
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widget->allocation.width,
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widget->allocation.height);
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widget->allocation = *allocation;
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if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
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{
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child_allocation.x = (GTK_CONTAINER (frame)->border_width +
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GTK_WIDGET (frame)->style->klass->xthickness);
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child_allocation.width = MAX(0, allocation->width - child_allocation.x * 2);
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child_allocation.y = (GTK_CONTAINER (frame)->border_width +
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MAX (frame->label_height, GTK_WIDGET (frame)->style->klass->ythickness));
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child_allocation.height = MAX (0, (allocation->height - child_allocation.y -
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GTK_CONTAINER (frame)->border_width -
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GTK_WIDGET (frame)->style->klass->ythickness));
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child_allocation.x += allocation->x;
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child_allocation.y += allocation->y;
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gtk_widget_size_allocate (bin->child, &child_allocation);
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}
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}
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