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[evince] [libview] Add loading window to show loading progress information

commit cc49d17cb3597257bb0d8dc1038de835fe330aa0
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Fri May 7 10:50:20 2010 +0200

    [libview] Add loading window to show loading progress information

 libview/Makefile.am         |    2 +
 libview/ev-loading-window.c |  280 +++++++++++++++++++++++++++++++++++++++++++
 libview/ev-loading-window.h |   49 ++++++++
 3 files changed, 331 insertions(+), 0 deletions(-)
---
diff --git a/libview/Makefile.am b/libview/Makefile.am
index f2848e6..980bc00 100644
--- a/libview/Makefile.am
+++ b/libview/Makefile.am
@@ -2,6 +2,7 @@ lib_LTLIBRARIES = libevview.la
 
 NOINST_H_FILES =			\
 	ev-annotation-window.h		\
+	ev-loading-window.h		\
 	ev-page-cache.h			\
 	ev-pixbuf-cache.h		\
 	ev-timeline.h			\
@@ -27,6 +28,7 @@ header_DATA = $(INST_H_FILES)
 libevview_la_SOURCES = 			\
 	ev-annotation-window.c		\
 	ev-document-model.c		\
+	ev-loading-window.c		\
 	ev-jobs.c			\
 	ev-job-scheduler.c		\
 	ev-page-cache.c			\
diff --git a/libview/ev-loading-window.c b/libview/ev-loading-window.c
new file mode 100644
index 0000000..6c60c34
--- /dev/null
+++ b/libview/ev-loading-window.c
@@ -0,0 +1,280 @@
+/* ev-loading-window.c
+ *  this file is part of evince, a gnome document viewer
+ *
+ * Copyright (C) 2010 Carlos Garcia Campos <carlosgc gnome org>
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <glib/gi18n.h>
+#include "ev-loading-window.h"
+
+enum {
+	PROP_0,
+	PROP_PARENT
+};
+
+struct _EvLoadingWindow {
+	GtkWindow  base_instance;
+
+	GtkWindow *parent;
+
+	gint       x;
+	gint       y;
+	gint       width;
+	gint       height;
+};
+
+struct _EvLoadingWindowClass {
+	GtkWindowClass base_class;
+};
+
+G_DEFINE_TYPE (EvLoadingWindow, ev_loading_window, GTK_TYPE_WINDOW)
+
+static void
+ev_loading_window_set_property (GObject      *object,
+				guint         prop_id,
+				const GValue *value,
+				GParamSpec   *pspec)
+{
+	EvLoadingWindow *window = EV_LOADING_WINDOW (object);
+
+	switch (prop_id) {
+	case PROP_PARENT:
+		window->parent = g_value_get_object (value);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+	}
+}
+
+static void
+ev_loading_window_init (EvLoadingWindow *window)
+{
+	GtkWindow   *gtk_window = GTK_WINDOW (window);
+	GtkWidget   *widget = GTK_WIDGET (window);
+	GtkWidget   *hbox;
+	GtkWidget   *spinner;
+	GtkWidget   *label;
+	GtkStyle    *style;
+	GdkColor    fg, bg;
+	const gchar *loading_text = _("Loadingâ?¦");
+	const gchar *fg_color_name = "info_fg_color";
+	const gchar *bg_color_name = "info_bg_color";
+
+	hbox = gtk_hbox_new (FALSE, 12);
+
+	spinner = gtk_spinner_new ();
+	gtk_spinner_start (GTK_SPINNER (spinner));
+	gtk_box_pack_start (GTK_BOX (hbox), spinner, FALSE, FALSE, 0);
+	gtk_widget_show (spinner);
+
+	label = gtk_label_new (loading_text);
+	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+	gtk_widget_show (label);
+
+	gtk_container_add (GTK_CONTAINER (window), hbox);
+	gtk_widget_show (hbox);
+
+	gtk_widget_set_app_paintable (widget, TRUE);
+
+	gtk_container_set_border_width (GTK_CONTAINER (window), 10);
+
+	gtk_window_set_accept_focus (gtk_window, FALSE);
+	gtk_window_set_focus_on_map (gtk_window, FALSE);
+	gtk_window_set_decorated (gtk_window, FALSE);
+	gtk_window_set_skip_taskbar_hint (gtk_window, TRUE);
+	gtk_window_set_skip_pager_hint (gtk_window, TRUE);
+	gtk_window_set_resizable (gtk_window, FALSE);
+
+	style = gtk_widget_get_style (widget);
+	if (!gtk_style_lookup_color (style, fg_color_name, &fg) ||
+	    !gtk_style_lookup_color (style, bg_color_name, &bg)) {
+		fg.pixel = 0;
+		fg.red = 0xb800;
+		fg.green = 0xad00;
+		fg.blue = 0x9d00;
+
+		bg.pixel = 0;
+		bg.red = 0xff00;
+		bg.green = 0xff00;
+		bg.blue = 0xbf00;
+	}
+
+	if (!gdk_color_equal (&bg, &style->bg[GTK_STATE_NORMAL]))
+		gtk_widget_modify_bg (widget, GTK_STATE_NORMAL, &bg);
+	if (!gdk_color_equal (&fg, &style->fg[GTK_STATE_NORMAL]))
+		gtk_widget_modify_fg (widget, GTK_STATE_NORMAL, &fg);
+}
+
+static GObject *
+ev_loading_window_constructor (GType                  type,
+			       guint                  n_construct_properties,
+			       GObjectConstructParam *construct_params)
+{
+	GObject         *object;
+	EvLoadingWindow *window;
+	GtkWindow       *gtk_window;
+
+	object = G_OBJECT_CLASS (ev_loading_window_parent_class)->constructor (type,
+									       n_construct_properties,
+									       construct_params);
+	window = EV_LOADING_WINDOW (object);
+	gtk_window = GTK_WINDOW (window);
+
+	gtk_window_set_transient_for (gtk_window, window->parent);
+	gtk_window_set_destroy_with_parent (gtk_window, TRUE);
+
+	return object;
+}
+
+static void
+_cairo_rounded_rectangle (cairo_t *cr,
+			  gint     width,
+			  gint     height,
+			  gdouble  radius)
+{
+	cairo_move_to (cr, radius, 0);
+	cairo_line_to (cr, width - radius, 0);
+	cairo_curve_to (cr,
+			width, 0,
+			width, 0,
+			width,
+			radius);
+	cairo_line_to (cr, width, height - radius);
+	cairo_curve_to (cr,
+			width,height,
+			width, height,
+			width - radius,
+			height);
+	cairo_line_to (cr, radius, height);
+	cairo_curve_to (cr,
+			0, height,
+			0, height,
+			0, height - radius);
+	cairo_line_to (cr, 0, radius);
+	cairo_curve_to (cr,
+			0, 0,
+			0, 0,
+			radius, 0);
+}
+
+static void
+ev_loading_window_size_allocate (GtkWidget      *widget,
+				 GtkAllocation  *allocation)
+{
+	EvLoadingWindow *window = EV_LOADING_WINDOW (widget);
+	GdkPixmap       *mask;
+	cairo_t         *cr;
+	double           r;
+
+	GTK_WIDGET_CLASS (ev_loading_window_parent_class)->size_allocate (widget, allocation);
+
+	if (allocation->width == window->width && allocation->height == window->height)
+		return;
+
+	window->width = allocation->width;
+	window->height = allocation->height;
+
+	mask = gdk_pixmap_new (NULL, window->width, window->height, 1);
+	cr = gdk_cairo_create (GDK_DRAWABLE (mask));
+
+	cairo_save (cr);
+	cairo_rectangle (cr, 0, 0, window->width, window->height);
+	cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+	cairo_fill (cr);
+	cairo_restore (cr);
+
+	cairo_set_source_rgb (cr, 1., 1., 1.);
+	r = MIN (window->width, window->height) / 2.;
+	_cairo_rounded_rectangle (cr, window->width, window->height, r);
+	cairo_fill (cr);
+
+	cairo_destroy (cr);
+
+	gtk_widget_shape_combine_mask (widget, mask, 0, 0);
+	g_object_unref (mask);
+}
+
+static void
+ev_loading_window_hide (GtkWidget *widget)
+{
+	EvLoadingWindow *window = EV_LOADING_WINDOW (widget);
+
+	window->x = window->y = 0;
+
+	GTK_WIDGET_CLASS (ev_loading_window_parent_class)->hide (widget);
+}
+
+static void
+ev_loading_window_class_init (EvLoadingWindowClass *klass)
+{
+	GObjectClass   *g_object_class = G_OBJECT_CLASS (klass);
+	GtkWidgetClass *gtk_widget_class = GTK_WIDGET_CLASS (klass);
+
+	g_object_class->constructor = ev_loading_window_constructor;
+	g_object_class->set_property = ev_loading_window_set_property;
+
+	gtk_widget_class->size_allocate = ev_loading_window_size_allocate;
+	gtk_widget_class->hide = ev_loading_window_hide;
+
+	g_object_class_install_property (g_object_class,
+					 PROP_PARENT,
+					 g_param_spec_object ("parent",
+							      "Parent",
+							      "The parent window",
+							      GTK_TYPE_WINDOW,
+							      G_PARAM_WRITABLE |
+							      G_PARAM_CONSTRUCT_ONLY));
+}
+
+/* Public methods */
+GtkWidget *
+ev_loading_window_new (GtkWindow *parent)
+{
+	GtkWidget *window;
+
+	g_return_val_if_fail (GTK_IS_WINDOW (parent), NULL);
+
+	window = g_object_new (EV_TYPE_LOADING_WINDOW,
+			       "parent", parent,
+			       NULL);
+	return window;
+}
+
+void
+ev_loading_window_get_size (EvLoadingWindow *window,
+			    gint            *width,
+			    gint            *height)
+{
+	if (width) *width = window->width;
+	if (height) *height = window->height;
+}
+
+void
+ev_loading_window_move (EvLoadingWindow *window,
+			gint             x,
+			gint             y)
+{
+	if (x == window->x && y == window->y)
+		return;
+
+	window->x = x;
+	window->y = y;
+	gtk_window_move (GTK_WINDOW (window), x, y);
+}
diff --git a/libview/ev-loading-window.h b/libview/ev-loading-window.h
new file mode 100644
index 0000000..199fc0c
--- /dev/null
+++ b/libview/ev-loading-window.h
@@ -0,0 +1,49 @@
+/* ev-loading-window.h
+ *  this file is part of evince, a gnome document viewer
+ *
+ * Copyright (C) 2010 Carlos Garcia Campos <carlosgc gnome org>
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef EV_LOADING_WINDOW_H
+#define EV_LOADING_WINDOW_H
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+typedef struct _EvLoadingWindow      EvLoadingWindow;
+typedef struct _EvLoadingWindowClass EvLoadingWindowClass;
+
+#define EV_TYPE_LOADING_WINDOW              (ev_loading_window_get_type())
+#define EV_LOADING_WINDOW(object)           (G_TYPE_CHECK_INSTANCE_CAST((object), EV_TYPE_LOADING_WINDOW, EvLoadingWindow))
+#define EV_LOADING_WINDOW_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST((klass), EV_TYPE_LOADING_WINDOW, EvLoadingWindowClass))
+#define EV_IS_LOADING_WINDOW(object)        (G_TYPE_CHECK_INSTANCE_TYPE((object), EV_TYPE_LOADING_WINDOW))
+#define EV_IS_LOADING_WINDOW_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE((klass), EV_TYPE_LOADING_WINDOW))
+#define EV_LOADING_WINDOW_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS((object), EV_TYPE_LOADING_WINDOW, EvLoadingWindowClass))
+
+GType      ev_loading_window_get_type (void) G_GNUC_CONST;
+GtkWidget *ev_loading_window_new      (GtkWindow       *parent);
+void       ev_loading_window_get_size (EvLoadingWindow *window,
+				       gint            *width,
+				       gint            *height);
+void       ev_loading_window_move     (EvLoadingWindow *window,
+				       gint             x,
+				       gint             y);
+
+G_END_DECLS
+
+#endif /* EV_LOADING_WINDOW_H */
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