625 lines
18 KiB
C
625 lines
18 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 "gtksignal.h"
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#include "gtkviewport.h"
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static void gtk_viewport_class_init (GtkViewportClass *klass);
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static void gtk_viewport_init (GtkViewport *viewport);
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static void gtk_viewport_map (GtkWidget *widget);
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static void gtk_viewport_unmap (GtkWidget *widget);
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static void gtk_viewport_realize (GtkWidget *widget);
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static void gtk_viewport_unrealize (GtkWidget *widget);
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static void gtk_viewport_paint (GtkWidget *widget,
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GdkRectangle *area);
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static void gtk_viewport_draw (GtkWidget *widget,
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GdkRectangle *area);
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static gint gtk_viewport_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static void gtk_viewport_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_viewport_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint gtk_viewport_need_resize (GtkContainer *container);
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static void gtk_viewport_adjustment_changed (GtkAdjustment *adjustment,
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gpointer data);
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static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
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gpointer data);
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guint
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gtk_viewport_get_type ()
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{
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static guint viewport_type = 0;
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if (!viewport_type)
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{
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GtkTypeInfo viewport_info =
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{
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"GtkViewport",
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sizeof (GtkViewport),
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sizeof (GtkViewportClass),
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(GtkClassInitFunc) gtk_viewport_class_init,
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(GtkObjectInitFunc) gtk_viewport_init,
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(GtkArgFunc) NULL,
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};
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viewport_type = gtk_type_unique (gtk_bin_get_type (), &viewport_info);
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}
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return viewport_type;
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}
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static void
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gtk_viewport_class_init (GtkViewportClass *class)
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{
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GtkWidgetClass *widget_class;
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GtkContainerClass *container_class;
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widget_class = (GtkWidgetClass*) class;
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container_class = (GtkContainerClass*) class;
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widget_class->map = gtk_viewport_map;
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widget_class->unmap = gtk_viewport_unmap;
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widget_class->realize = gtk_viewport_realize;
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widget_class->unrealize = gtk_viewport_unrealize;
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widget_class->draw = gtk_viewport_draw;
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widget_class->expose_event = gtk_viewport_expose;
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widget_class->size_request = gtk_viewport_size_request;
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widget_class->size_allocate = gtk_viewport_size_allocate;
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container_class->need_resize = gtk_viewport_need_resize;
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}
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static void
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gtk_viewport_init (GtkViewport *viewport)
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{
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GTK_WIDGET_UNSET_FLAGS (viewport, GTK_NO_WINDOW);
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GTK_WIDGET_SET_FLAGS (viewport, GTK_BASIC);
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viewport->shadow_type = GTK_SHADOW_IN;
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viewport->main_window = NULL;
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viewport->view_window = NULL;
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viewport->hadjustment = NULL;
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viewport->vadjustment = NULL;
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}
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GtkWidget*
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gtk_viewport_new (GtkAdjustment *hadjustment,
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GtkAdjustment *vadjustment)
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{
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GtkViewport *viewport;
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viewport = gtk_type_new (gtk_viewport_get_type ());
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if (!hadjustment)
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hadjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
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if (!vadjustment)
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vadjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
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gtk_viewport_set_hadjustment (viewport, hadjustment);
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gtk_viewport_set_vadjustment (viewport, vadjustment);
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return GTK_WIDGET (viewport);
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}
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GtkAdjustment*
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gtk_viewport_get_hadjustment (GtkViewport *viewport)
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{
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g_return_val_if_fail (viewport != NULL, NULL);
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g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
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return viewport->hadjustment;
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}
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GtkAdjustment*
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gtk_viewport_get_vadjustment (GtkViewport *viewport)
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{
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g_return_val_if_fail (viewport != NULL, NULL);
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g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
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return viewport->vadjustment;
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}
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void
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gtk_viewport_set_hadjustment (GtkViewport *viewport,
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GtkAdjustment *adjustment)
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{
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g_return_if_fail (viewport != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (viewport));
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g_return_if_fail (adjustment != NULL);
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if (viewport->hadjustment != adjustment)
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{
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if (viewport->hadjustment)
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{
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gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->hadjustment),
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(gpointer) viewport);
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gtk_object_unref (GTK_OBJECT (viewport->hadjustment));
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}
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viewport->hadjustment = adjustment;
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gtk_object_ref (GTK_OBJECT (viewport->hadjustment));
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gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
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(GtkSignalFunc) gtk_viewport_adjustment_changed,
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(gpointer) viewport);
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gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
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(GtkSignalFunc)gtk_viewport_adjustment_value_changed,
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(gpointer) viewport);
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gtk_viewport_adjustment_changed (adjustment, (gpointer) viewport);
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}
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}
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void
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gtk_viewport_set_vadjustment (GtkViewport *viewport,
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GtkAdjustment *adjustment)
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{
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g_return_if_fail (viewport != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (viewport));
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g_return_if_fail (adjustment != NULL);
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if (viewport->vadjustment != adjustment)
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{
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if (viewport->vadjustment)
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{
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gtk_signal_disconnect_by_data (GTK_OBJECT (viewport->vadjustment),
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(gpointer) viewport);
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gtk_object_unref (GTK_OBJECT (viewport->vadjustment));
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}
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viewport->vadjustment = adjustment;
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gtk_object_ref (GTK_OBJECT (viewport->vadjustment));
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gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
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(GtkSignalFunc) gtk_viewport_adjustment_changed,
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(gpointer) viewport);
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gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
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(GtkSignalFunc)gtk_viewport_adjustment_value_changed,
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(gpointer) viewport);
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gtk_viewport_adjustment_changed (adjustment, (gpointer) viewport);
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}
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}
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void
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gtk_viewport_set_shadow_type (GtkViewport *viewport,
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GtkShadowType type)
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{
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g_return_if_fail (viewport != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (viewport));
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if ((GtkShadowType) viewport->shadow_type != type)
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{
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viewport->shadow_type = type;
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if (GTK_WIDGET_VISIBLE (viewport))
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{
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gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation));
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gtk_widget_queue_draw (GTK_WIDGET (viewport));
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}
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}
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}
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static void
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gtk_viewport_map (GtkWidget *widget)
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{
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GtkViewport *viewport;
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GtkBin *bin;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
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viewport = GTK_VIEWPORT (widget);
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bin = GTK_BIN (widget);
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gdk_window_show (viewport->main_window);
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if (bin->child &&
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GTK_WIDGET_VISIBLE (bin->child) &&
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!GTK_WIDGET_MAPPED (bin->child))
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gtk_widget_map (bin->child);
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}
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static void
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gtk_viewport_unmap (GtkWidget *widget)
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{
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GtkViewport *viewport;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
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viewport = GTK_VIEWPORT (widget);
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gdk_window_hide (viewport->main_window);
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}
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static void
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gtk_viewport_realize (GtkWidget *widget)
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{
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GtkViewport *viewport;
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GdkWindowAttr attributes;
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GtkRequisition *child_requisition;
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gint attributes_mask;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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viewport = GTK_VIEWPORT (widget);
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GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
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attributes.x = widget->allocation.x + GTK_CONTAINER (widget)->border_width;
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attributes.y = widget->allocation.y + GTK_CONTAINER (widget)->border_width;
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attributes.width = widget->allocation.width - GTK_CONTAINER (widget)->border_width * 2;
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attributes.height = widget->allocation.height - GTK_CONTAINER (widget)->border_width * 2;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.colormap = gtk_widget_get_colormap (widget);
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attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
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viewport->main_window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
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gdk_window_set_user_data (viewport->main_window, viewport);
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attributes.x += widget->style->klass->xthickness;
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attributes.y += widget->style->klass->ythickness;
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attributes.width -= widget->style->klass->xthickness * 2;
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attributes.height -= widget->style->klass->ythickness * 2;
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viewport->view_window = gdk_window_new (viewport->main_window, &attributes, attributes_mask);
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gdk_window_set_user_data (viewport->view_window, viewport);
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attributes.x = 0;
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attributes.y = 0;
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if (GTK_BIN (viewport)->child)
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{
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child_requisition = >K_WIDGET (GTK_BIN (viewport)->child)->requisition;
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attributes.width = child_requisition->width;
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attributes.height = child_requisition->height;
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}
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widget->window = gdk_window_new (viewport->view_window, &attributes, attributes_mask);
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gdk_window_set_user_data (widget->window, viewport);
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widget->style = gtk_style_attach (widget->style, viewport->main_window);
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gtk_style_set_background (widget->style, viewport->main_window, GTK_STATE_NORMAL);
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gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
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gdk_window_show (widget->window);
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gdk_window_show (viewport->view_window);
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}
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static void
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gtk_viewport_unrealize (GtkWidget *widget)
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{
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GtkViewport *viewport;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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viewport = GTK_VIEWPORT (widget);
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GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
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gtk_style_detach (widget->style);
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gdk_window_destroy (widget->window);
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gdk_window_destroy (viewport->view_window);
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gdk_window_destroy (viewport->main_window);
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widget->window = NULL;
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viewport->view_window = NULL;
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viewport->main_window = NULL;
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}
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static void
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gtk_viewport_paint (GtkWidget *widget,
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GdkRectangle *area)
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{
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GtkViewport *viewport;
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GtkStateType state;
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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_VIEWPORT (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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viewport = GTK_VIEWPORT (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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x = GTK_CONTAINER (viewport)->border_width;
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y = GTK_CONTAINER (viewport)->border_width;
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gtk_draw_shadow (widget->style, viewport->main_window,
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GTK_STATE_NORMAL, viewport->shadow_type,
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0, 0, -1, -1);
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}
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}
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static void
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gtk_viewport_draw (GtkWidget *widget,
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GdkRectangle *area)
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{
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GtkViewport *viewport;
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GtkBin *bin;
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GdkRectangle tmp_area;
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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_VIEWPORT (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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viewport = GTK_VIEWPORT (widget);
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bin = GTK_BIN (widget);
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gtk_viewport_paint (widget, area);
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if (bin->child)
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{
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tmp_area = *area;
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tmp_area.x += viewport->hadjustment->value;
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tmp_area.y += viewport->vadjustment->value;
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if (gtk_widget_intersect (bin->child, &tmp_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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}
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static gint
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gtk_viewport_expose (GtkWidget *widget,
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GdkEventExpose *event)
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{
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GtkViewport *viewport;
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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_VIEWPORT (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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viewport = GTK_VIEWPORT (widget);
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bin = GTK_BIN (widget);
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if (event->window == viewport->main_window)
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gtk_viewport_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_viewport_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkViewport *viewport;
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GtkBin *bin;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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g_return_if_fail (requisition != NULL);
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viewport = GTK_VIEWPORT (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 + 5;
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requisition->height = (GTK_CONTAINER (widget)->border_width * 2 +
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GTK_WIDGET (widget)->style->klass->ythickness) * 2 + 5;
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if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
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gtk_widget_size_request (bin->child, &bin->child->requisition);
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}
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static void
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gtk_viewport_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkViewport *viewport;
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GtkBin *bin;
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GtkAllocation child_allocation;
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gint hval, vval;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_VIEWPORT (widget));
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g_return_if_fail (allocation != NULL);
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widget->allocation = *allocation;
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viewport = GTK_VIEWPORT (widget);
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bin = GTK_BIN (widget);
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child_allocation.x = GTK_WIDGET (viewport)->style->klass->xthickness;
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child_allocation.width = allocation->width - child_allocation.x * 2;
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child_allocation.y = GTK_WIDGET (viewport)->style->klass->ythickness;
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child_allocation.height = allocation->height - child_allocation.y * 2;
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if (GTK_WIDGET_REALIZED (widget))
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{
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gdk_window_move_resize (viewport->main_window,
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allocation->x + GTK_CONTAINER (viewport)->border_width,
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allocation->y + GTK_CONTAINER (viewport)->border_width,
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allocation->width - GTK_CONTAINER (viewport)->border_width * 2,
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allocation->height - GTK_CONTAINER (viewport)->border_width * 2);
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gdk_window_move_resize (viewport->view_window,
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child_allocation.x,
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child_allocation.y,
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child_allocation.width,
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child_allocation.height);
|
|
}
|
|
|
|
viewport->hadjustment->page_size = child_allocation.width;
|
|
viewport->hadjustment->page_increment = viewport->hadjustment->page_size / 2;
|
|
viewport->hadjustment->step_increment = 10;
|
|
|
|
viewport->vadjustment->page_size = child_allocation.height;
|
|
viewport->vadjustment->page_increment = viewport->vadjustment->page_size / 2;
|
|
viewport->vadjustment->step_increment = 10;
|
|
|
|
hval = viewport->hadjustment->value;
|
|
vval = viewport->vadjustment->value;
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
viewport->hadjustment->lower = 0;
|
|
viewport->hadjustment->upper = MAX (bin->child->requisition.width,
|
|
child_allocation.width);
|
|
|
|
hval = CLAMP (hval, 0,
|
|
viewport->hadjustment->upper -
|
|
viewport->hadjustment->page_size);
|
|
|
|
viewport->vadjustment->lower = 0;
|
|
viewport->vadjustment->upper = MAX (bin->child->requisition.height,
|
|
child_allocation.height);
|
|
|
|
vval = CLAMP (vval, 0,
|
|
viewport->vadjustment->upper -
|
|
viewport->vadjustment->page_size);
|
|
}
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
|
|
child_allocation.width = viewport->hadjustment->upper;
|
|
child_allocation.height = viewport->vadjustment->upper;
|
|
|
|
if (!GTK_WIDGET_REALIZED (widget))
|
|
gtk_widget_realize (widget);
|
|
|
|
gdk_window_resize (widget->window,
|
|
child_allocation.width,
|
|
child_allocation.height);
|
|
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
gtk_widget_size_allocate (bin->child, &child_allocation);
|
|
}
|
|
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->hadjustment), "changed");
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->vadjustment), "changed");
|
|
if (viewport->hadjustment->value != hval)
|
|
{
|
|
viewport->hadjustment->value = hval;
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->hadjustment), "value_changed");
|
|
}
|
|
if (viewport->vadjustment->value != vval)
|
|
{
|
|
viewport->vadjustment->value = vval;
|
|
gtk_signal_emit_by_name (GTK_OBJECT (viewport->vadjustment), "value_changed");
|
|
}
|
|
}
|
|
|
|
static gint
|
|
gtk_viewport_need_resize (GtkContainer *container)
|
|
{
|
|
GtkBin *bin;
|
|
|
|
g_return_val_if_fail (container != NULL, FALSE);
|
|
g_return_val_if_fail (GTK_IS_VIEWPORT (container), FALSE);
|
|
|
|
if (GTK_WIDGET_REALIZED (container))
|
|
{
|
|
bin = GTK_BIN (container);
|
|
|
|
gtk_widget_size_request (bin->child, &bin->child->requisition);
|
|
|
|
gtk_widget_size_allocate (GTK_WIDGET (container),
|
|
&(GTK_WIDGET (container)->allocation));
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_adjustment_changed (GtkAdjustment *adjustment,
|
|
gpointer data)
|
|
{
|
|
GtkViewport *viewport;
|
|
|
|
g_return_if_fail (adjustment != NULL);
|
|
g_return_if_fail (data != NULL);
|
|
g_return_if_fail (GTK_IS_VIEWPORT (data));
|
|
|
|
viewport = GTK_VIEWPORT (data);
|
|
}
|
|
|
|
static void
|
|
gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
|
|
gpointer data)
|
|
{
|
|
GtkViewport *viewport;
|
|
GtkBin *bin;
|
|
GtkAllocation child_allocation;
|
|
gint width, height;
|
|
|
|
g_return_if_fail (adjustment != NULL);
|
|
g_return_if_fail (data != NULL);
|
|
g_return_if_fail (GTK_IS_VIEWPORT (data));
|
|
|
|
viewport = GTK_VIEWPORT (data);
|
|
bin = GTK_BIN (data);
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
gdk_window_get_size (viewport->view_window, &width, &height);
|
|
|
|
child_allocation.x = 0;
|
|
child_allocation.y = 0;
|
|
|
|
if (viewport->hadjustment->lower != (viewport->hadjustment->upper -
|
|
viewport->hadjustment->page_size))
|
|
child_allocation.x = viewport->hadjustment->lower - viewport->hadjustment->value;
|
|
|
|
if (viewport->vadjustment->lower != (viewport->vadjustment->upper -
|
|
viewport->vadjustment->page_size))
|
|
child_allocation.y = viewport->vadjustment->lower - viewport->vadjustment->value;
|
|
|
|
if (GTK_WIDGET_REALIZED (viewport))
|
|
gdk_window_move (GTK_WIDGET (viewport)->window,
|
|
child_allocation.x,
|
|
child_allocation.y);
|
|
}
|
|
}
|