260 lines
7.2 KiB
C
260 lines
7.2 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 "gtkprogressbar.h"
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#define MIN_WIDTH 200
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#define MIN_HEIGHT 20
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static void gtk_progress_bar_class_init (GtkProgressBarClass *klass);
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static void gtk_progress_bar_init (GtkProgressBar *pbar);
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static void gtk_progress_bar_realize (GtkWidget *widget);
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static void gtk_progress_bar_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint gtk_progress_bar_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static void gtk_progress_bar_make_pixmap (GtkProgressBar *pbar);
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static void gtk_progress_bar_paint (GtkProgressBar *pbar);
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guint
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gtk_progress_bar_get_type ()
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{
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static guint progress_bar_type = 0;
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if (!progress_bar_type)
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{
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GtkTypeInfo progress_bar_info =
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{
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"GtkProgressBar",
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sizeof (GtkProgressBar),
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sizeof (GtkProgressBarClass),
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(GtkClassInitFunc) gtk_progress_bar_class_init,
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(GtkObjectInitFunc) gtk_progress_bar_init,
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(GtkArgFunc) NULL,
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};
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progress_bar_type = gtk_type_unique (gtk_widget_get_type (), &progress_bar_info);
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}
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return progress_bar_type;
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}
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static void
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gtk_progress_bar_class_init (GtkProgressBarClass *class)
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{
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GtkWidgetClass *widget_class;
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widget_class = (GtkWidgetClass*) class;
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widget_class->realize = gtk_progress_bar_realize;
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widget_class->size_allocate = gtk_progress_bar_size_allocate;
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widget_class->expose_event = gtk_progress_bar_expose;
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}
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static void
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gtk_progress_bar_init (GtkProgressBar *pbar)
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{
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GTK_WIDGET_SET_FLAGS (pbar, GTK_BASIC);
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GTK_WIDGET (pbar)->requisition.width = MIN_WIDTH;
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GTK_WIDGET (pbar)->requisition.height = MIN_HEIGHT;
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pbar->offscreen_pixmap = NULL;
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pbar->percentage = 0;
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}
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GtkWidget*
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gtk_progress_bar_new ()
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{
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return GTK_WIDGET (gtk_type_new (gtk_progress_bar_get_type ()));
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}
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void
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gtk_progress_bar_update (GtkProgressBar *pbar,
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gfloat percentage)
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{
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g_return_if_fail (pbar != NULL);
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g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
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if (percentage < 0.0)
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percentage = 0.0;
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else if (percentage > 1.0)
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percentage = 1.0;
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if (pbar->percentage != percentage)
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{
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pbar->percentage = percentage;
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gtk_progress_bar_paint (pbar);
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gtk_widget_queue_draw (GTK_WIDGET (pbar));
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}
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}
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static void
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gtk_progress_bar_realize (GtkWidget *widget)
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{
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GtkProgressBar *pbar;
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GdkWindowAttr attributes;
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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_PROGRESS_BAR (widget));
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pbar = GTK_PROGRESS_BAR (widget);
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GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.x = widget->allocation.x;
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attributes.y = widget->allocation.y;
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attributes.width = widget->allocation.width;
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attributes.height = widget->allocation.height;
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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);
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attributes.event_mask |= 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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widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
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gdk_window_set_user_data (widget->window, pbar);
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widget->style = gtk_style_attach (widget->style, widget->window);
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gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
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gtk_progress_bar_make_pixmap (pbar);
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}
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static void
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gtk_progress_bar_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
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g_return_if_fail (allocation != NULL);
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widget->allocation = *allocation;
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if (GTK_WIDGET_REALIZED (widget))
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{
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gdk_window_move_resize (widget->window,
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allocation->x, allocation->y,
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allocation->width, allocation->height);
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gtk_progress_bar_make_pixmap (GTK_PROGRESS_BAR (widget));
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}
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}
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static gint
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gtk_progress_bar_expose (GtkWidget *widget,
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GdkEventExpose *event)
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{
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GtkProgressBar *pbar;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_PROGRESS_BAR (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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pbar = GTK_PROGRESS_BAR (widget);
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gdk_draw_pixmap (widget->window,
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widget->style->black_gc,
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pbar->offscreen_pixmap,
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0, 0, 0, 0,
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widget->allocation.width,
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widget->allocation.height);
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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_progress_bar_make_pixmap (GtkProgressBar *pbar)
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{
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GtkWidget *widget;
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g_return_if_fail (pbar != NULL);
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g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
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if (GTK_WIDGET_REALIZED (pbar))
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{
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widget = GTK_WIDGET (pbar);
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if (pbar->offscreen_pixmap)
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gdk_pixmap_unref (pbar->offscreen_pixmap);
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pbar->offscreen_pixmap = gdk_pixmap_new (widget->window,
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widget->allocation.width,
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widget->allocation.height,
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-1);
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gtk_progress_bar_paint (pbar);
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}
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}
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static void
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gtk_progress_bar_paint (GtkProgressBar *pbar)
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{
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GtkWidget *widget;
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int amount;
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g_return_if_fail (pbar != NULL);
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g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
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if (pbar->offscreen_pixmap)
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{
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widget = GTK_WIDGET (pbar);
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gtk_draw_shadow (widget->style,
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pbar->offscreen_pixmap,
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GTK_STATE_NORMAL, GTK_SHADOW_IN, 0, 0,
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widget->allocation.width,
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widget->allocation.height);
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gdk_draw_rectangle (pbar->offscreen_pixmap,
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widget->style->bg_gc[GTK_STATE_ACTIVE], TRUE,
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widget->style->klass->xthickness,
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widget->style->klass->ythickness,
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widget->allocation.width - widget->style->klass->xthickness * 2,
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widget->allocation.height - widget->style->klass->ythickness * 2);
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amount = pbar->percentage * (widget->allocation.width - widget->style->klass->xthickness * 2);
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if (amount > 0)
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{
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gdk_draw_rectangle (pbar->offscreen_pixmap,
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widget->style->bg_gc[GTK_STATE_PRELIGHT], TRUE,
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widget->style->klass->xthickness,
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widget->style->klass->ythickness,
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amount,
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widget->allocation.height - widget->style->klass->ythickness * 2);
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gtk_draw_shadow (widget->style,
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pbar->offscreen_pixmap,
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GTK_STATE_PRELIGHT, GTK_SHADOW_OUT,
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widget->style->klass->xthickness,
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widget->style->klass->ythickness,
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amount,
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widget->allocation.height - widget->style->klass->ythickness * 2);
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}
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}
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}
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