Merging changes:

2001-11-08  Christopher James Lahey  <clahey@ximian.com>

	* gal/Makefile.am: Added e-canvas-background.lo.

	* gal/widgets/Makefile.am: Added e-canvas-background.c and
	e-canvas-background.h.

	* gal/widgets/e-canvas-background.c,
	gal/widgets/e-canvas-background.h: New class, provides infinite
	background color or arbitrary rectangle of background color.

svn path=/trunk/; revision=15126

1 files changed, 464 insertions, 0 deletions

diff --git a/widgets/misc/e-canvas-background.c b/widgets/misc/e-canvas-background.c
new file mode 100644
index 0000000000..36b84635ed
--- /dev/null
+++ b/widgets/misc/e-canvas-background.c
@@ -0,0 +1,464 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * e-canvas-background.c - background color for canvas.
+ * Copyright 2001, Ximian, Inc.
+ *
+ * Authors:
+ *   Chris Lahey <clahey@ximian.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License, version 2, as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include "e-canvas-background.h"
+
+#include <math.h>
+#include <stdio.h>
+#include <gtk/gtksignal.h>
+#include <gdk/gdkkeysyms.h>
+#include "gal/widgets/e-hsv-utils.h"
+#include "gal/widgets/e-canvas.h"
+#include "gal/widgets/e-canvas-utils.h"
+#include "gal/util/e-util.h"
+#include <string.h>
+
+#define PARENT_OBJECT_TYPE gnome_canvas_item_get_type ()
+
+#define d(x)
+
+struct _ECanvasBackgroundPrivate {
+	guint rgba;		/* Fill color, RGBA */
+	GdkColor color;		/* Fill color */
+	GdkBitmap *stipple;	/* Stipple for fill */
+	GdkGC *gc;			/* GC for filling */
+	double x1;
+	double x2;
+	double y1;
+	double y2;
+
+	guint needs_redraw : 1;
+};
+
+static GnomeCanvasItemClass *parent_class;
+
+enum {
+	ARG_0,
+	ARG_FILL_COLOR,
+	ARG_FILL_COLOR_GDK,
+	ARG_FILL_COLOR_RGBA,
+	ARG_FILL_STIPPLE,
+	ARG_X1,
+	ARG_X2,
+	ARG_Y1,
+	ARG_Y2,
+};
+
+static void
+get_color(ECanvasBackground *ecb)
+{
+	int n;
+	GnomeCanvasItem *item = GNOME_CANVAS_ITEM (ecb);
+
+	n = 0;
+	gdk_color_context_get_pixels (item->canvas->cc,
+				      &ecb->priv->color.red,
+				      &ecb->priv->color.green,
+				      &ecb->priv->color.blue,
+				      1,
+				      &ecb->priv->color.pixel,
+				      &n);
+}
+
+static void
+ecb_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
+{
+	double   i2c [6];
+	ArtPoint c1, c2, i1, i2;
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+
+	/* Wrong BBox's are the source of redraw nightmares */
+
+	gnome_canvas_item_i2c_affine (GNOME_CANVAS_ITEM (ecb), i2c);
+	
+	i1.x = ecb->priv->x1;
+	i1.y = ecb->priv->y1;
+	i2.x = ecb->priv->x2;
+	i2.y = ecb->priv->y2;
+	art_affine_point (&c1, &i1, i2c);
+	art_affine_point (&c2, &i2, i2c);
+
+	if (ecb->priv->x1 < 0)
+		c1.x = -(double)UINT_MAX;
+
+	if (ecb->priv->y1 < 0)
+		c1.y = -(double)UINT_MAX;
+
+	if (ecb->priv->x2 < 0)
+		c2.x = (double)UINT_MAX;
+
+	if (ecb->priv->y2 < 0)
+		c2.y = (double)UINT_MAX;
+
+	*x1 = c1.x;
+	*y1 = c1.y;
+	*x2 = c2.x + 1;
+	*y2 = c2.y + 1;
+}
+
+/*
+ * GnomeCanvasItem::update method
+ */
+static void
+ecb_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
+{
+	ArtPoint o1, o2;
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+
+	if (GNOME_CANVAS_ITEM_CLASS (parent_class)->update)
+		GNOME_CANVAS_ITEM_CLASS (parent_class)->update (item, affine, clip_path, flags);
+
+	o1.x = item->x1;
+	o1.y = item->y1;
+	o2.x = item->x2;
+	o2.y = item->y2;
+
+	ecb_bounds (item, &item->x1, &item->y1, &item->x2, &item->y2);
+	if (item->x1 != o1.x ||
+	    item->y1 != o1.y ||
+	    item->x2 != o2.x ||
+	    item->y2 != o2.y) {
+		gnome_canvas_request_redraw (item->canvas, o1.x, o1.y, o2.x, o2.y);
+		ecb->priv->needs_redraw = 1;
+	}
+
+	if (ecb->priv->needs_redraw) {
+		gnome_canvas_request_redraw (item->canvas, item->x1, item->y1,
+					     item->x2, item->y2);
+		ecb->priv->needs_redraw = 0;
+	}
+}
+
+/* Sets the stipple pattern for the text */
+static void
+set_stipple (ECanvasBackground *ecb, GdkBitmap *stipple, int use_value)
+{
+	if (use_value) {
+		if (ecb->priv->stipple)
+			gdk_bitmap_unref (ecb->priv->stipple);
+
+		ecb->priv->stipple = stipple;
+		if (stipple)
+			gdk_bitmap_ref (stipple);
+	}
+
+	if (ecb->priv->gc) {
+		if (stipple) {
+			gdk_gc_set_stipple (ecb->priv->gc, stipple);
+			gdk_gc_set_fill (ecb->priv->gc, GDK_STIPPLED);
+		} else
+			gdk_gc_set_fill (ecb->priv->gc, GDK_SOLID);
+	}
+}
+
+static void
+ecb_destroy (GtkObject *object)
+{
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (object);
+
+	if (ecb->priv->stipple)
+		gdk_bitmap_unref (ecb->priv->stipple);
+	ecb->priv->stipple = NULL;
+
+	if (GTK_OBJECT_CLASS (parent_class)->destroy)
+                GTK_OBJECT_CLASS (parent_class)->destroy (object);
+}
+
+static void
+ecb_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
+{
+	GnomeCanvasItem *item;
+	ECanvasBackground *ecb;
+
+	GdkColor color = { 0, 0, 0, 0, };
+	GdkColor *pcolor;
+	gboolean color_changed = FALSE;
+
+	item = GNOME_CANVAS_ITEM (o);
+	ecb = E_CANVAS_BACKGROUND (o);
+
+	switch (arg_id){
+	case ARG_FILL_COLOR:
+		if (GTK_VALUE_STRING (*arg))
+			gdk_color_parse (GTK_VALUE_STRING (*arg), &color);
+
+		ecb->priv->rgba = ((color.red & 0xff00) << 16 |
+				   (color.green & 0xff00) << 8 |
+				   (color.blue & 0xff00) |
+				   0xff);
+		color_changed = TRUE;
+		break;
+
+	case ARG_FILL_COLOR_GDK:
+		pcolor = GTK_VALUE_BOXED (*arg);
+		if (pcolor) {
+			color = *pcolor;
+		}
+
+		ecb->priv->rgba = ((color.red & 0xff00) << 16 |
+				   (color.green & 0xff00) << 8 |
+				   (color.blue & 0xff00) |
+				   0xff);
+		color_changed = TRUE;
+		break;
+
+        case ARG_FILL_COLOR_RGBA:
+		ecb->priv->rgba = GTK_VALUE_UINT (*arg);
+		color.red = ((ecb->priv->rgba >> 24) & 0xff) * 0x101;
+		color.green = ((ecb->priv->rgba >> 16) & 0xff) * 0x101;
+		color.blue = ((ecb->priv->rgba >> 8) & 0xff) * 0x101;
+		color_changed = TRUE;
+		break;
+
+	case ARG_FILL_STIPPLE:
+		set_stipple (ecb, GTK_VALUE_BOXED (*arg), TRUE);
+		break;
+
+	case ARG_X1:
+		ecb->priv->x1 = GTK_VALUE_DOUBLE (*arg);
+		break;
+	case ARG_X2:
+		ecb->priv->x2 = GTK_VALUE_DOUBLE (*arg);
+		break;
+	case ARG_Y1:
+		ecb->priv->y1 = GTK_VALUE_DOUBLE (*arg);
+		break;
+	case ARG_Y2:
+		ecb->priv->y2 = GTK_VALUE_DOUBLE (*arg);
+		break;
+	}
+
+	if (color_changed) {
+		ecb->priv->color = color;
+
+		if (GNOME_CANVAS_ITEM_REALIZED & GTK_OBJECT_FLAGS(item)) {
+			get_color (ecb);
+			if (!item->canvas->aa) {
+				gdk_gc_set_foreground (ecb->priv->gc, &ecb->priv->color);
+			}
+		}
+	}
+
+	ecb->priv->needs_redraw = 1;
+	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ecb));
+}
+
+static void
+ecb_get_arg (GtkObject *o, GtkArg *arg, guint arg_id)
+{
+	GnomeCanvasItem *item;
+	ECanvasBackground *ecb;
+
+	item = GNOME_CANVAS_ITEM (o);
+	ecb = E_CANVAS_BACKGROUND (o);
+
+	switch (arg_id){
+	case ARG_FILL_COLOR_GDK:
+		GTK_VALUE_BOXED (*arg) = gdk_color_copy (&ecb->priv->color);
+		break;
+        case ARG_FILL_COLOR_RGBA:
+		GTK_VALUE_UINT (*arg) = ecb->priv->rgba;
+		break;
+	case ARG_FILL_STIPPLE:
+		GTK_VALUE_BOXED (*arg) = ecb->priv->stipple;
+		break;
+	case ARG_X1:
+		GTK_VALUE_DOUBLE (*arg) = ecb->priv->x1;
+		break;
+	case ARG_X2:
+		GTK_VALUE_DOUBLE (*arg) = ecb->priv->x2;
+		break;
+	case ARG_Y1:
+		GTK_VALUE_DOUBLE (*arg) = ecb->priv->y1;
+		break;
+	case ARG_Y2:
+		GTK_VALUE_DOUBLE (*arg) = ecb->priv->y2;
+		break;
+	default:
+		arg->type = GTK_TYPE_INVALID;
+		break;
+	}
+}
+
+static void
+ecb_init (GnomeCanvasItem *item)
+{
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+
+	ecb->priv               = g_new (ECanvasBackgroundPrivate, 1);
+
+	ecb->priv->color        = (GdkColor) {0,};
+	ecb->priv->stipple      = NULL;
+	ecb->priv->gc           = NULL;
+	ecb->priv->x1           = -1.0;
+	ecb->priv->x2           = -1.0;
+	ecb->priv->y1           = -1.0;
+	ecb->priv->y2           = -1.0;
+}
+
+static void
+ecb_realize (GnomeCanvasItem *item)
+{
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+	
+	if (GNOME_CANVAS_ITEM_CLASS (parent_class)->realize)
+                GNOME_CANVAS_ITEM_CLASS (parent_class)->realize (item);
+
+	ecb->priv->gc = gdk_gc_new (item->canvas->layout.bin_window);
+	get_color (ecb);
+	if (!item->canvas->aa)
+		gdk_gc_set_foreground (ecb->priv->gc, &ecb->priv->color);
+
+	set_stipple (ecb, NULL, FALSE);
+	
+	ecb->priv->needs_redraw = 1;
+	gnome_canvas_item_request_update (GNOME_CANVAS_ITEM (ecb));
+}
+
+static void
+ecb_unrealize (GnomeCanvasItem *item)
+{
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+
+	gdk_gc_unref (ecb->priv->gc);
+	ecb->priv->gc = NULL;
+
+	if (GNOME_CANVAS_ITEM_CLASS (parent_class)->unrealize)
+                GNOME_CANVAS_ITEM_CLASS (parent_class)->unrealize (item);
+}
+
+static void
+ecb_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int width, int height)
+{
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+	int x1, x2, y1, y2;
+	double i2c [6];
+	ArtPoint upper_left, lower_right, ecb_base_point;
+	
+	/*
+	 * Find out our real position after grouping
+	 */
+	gnome_canvas_item_i2c_affine (item, i2c);
+	ecb_base_point.x = ecb->priv->x1;
+	ecb_base_point.y = ecb->priv->y1;
+	art_affine_point (&upper_left, &ecb_base_point, i2c);
+
+	ecb_base_point.x = ecb->priv->x2;
+	ecb_base_point.y = ecb->priv->y2;
+	art_affine_point (&lower_right, &ecb_base_point, i2c);
+
+	x1 = 0;
+	y1 = 0;
+	x2 = width;
+	y2 = height;
+	if (ecb->priv->x1 >= 0 && upper_left.x > x1)
+		x1 = upper_left.x;
+	if (ecb->priv->y1 >= 0 && upper_left.y > y1)
+		y1 = upper_left.y;
+	if (ecb->priv->x2 >= 0 && lower_right.x < x2)
+		x2 = lower_right.x;
+	if (ecb->priv->y2 >= 0 && lower_right.y < y2)
+		y2 = lower_right.y;
+
+	gdk_draw_rectangle (drawable, ecb->priv->gc, TRUE,
+			    x1, y1, x2 - x1, y2 - y1);
+}
+
+static double
+ecb_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
+	   GnomeCanvasItem **actual_item)
+{
+	ECanvasBackground *ecb = E_CANVAS_BACKGROUND (item);
+
+	if (ecb->priv->x1 >= 0 && ecb->priv->x1 > x)
+		return 1.0;
+	if (ecb->priv->x2 >= 0 && ecb->priv->x2 < x)
+		return 1.0;
+	if (ecb->priv->y1 >= 0 && ecb->priv->y1 > y)
+		return 1.0;
+	if (ecb->priv->y2 >= 0 && ecb->priv->y2 < y)
+		return 1.0;
+	*actual_item = item;
+
+	return 0.0;
+}
+
+static void
+ecb_class_init (GtkObjectClass *object_class)
+{
+	GnomeCanvasItemClass *item_class = (GnomeCanvasItemClass *) object_class;
+	
+	parent_class                = gtk_type_class (PARENT_OBJECT_TYPE);
+	
+	object_class->destroy       = ecb_destroy;
+	object_class->set_arg       = ecb_set_arg;
+	object_class->get_arg       = ecb_get_arg;
+
+	item_class->update          = ecb_update;
+	item_class->realize         = ecb_realize;
+	item_class->unrealize       = ecb_unrealize;
+	item_class->draw            = ecb_draw;
+	item_class->point           = ecb_point;
+
+	gtk_object_add_arg_type ("ECanvasBackground::fill_color", GTK_TYPE_STRING,
+				 GTK_ARG_WRITABLE, ARG_FILL_COLOR);
+	gtk_object_add_arg_type ("ECanvasBackground::fill_color_gdk", GTK_TYPE_GDK_COLOR,
+				 GTK_ARG_READWRITE, ARG_FILL_COLOR_GDK);
+	gtk_object_add_arg_type ("ECanvasBackground::fill_color_rgba", GTK_TYPE_UINT,
+				 GTK_ARG_READWRITE, ARG_FILL_COLOR_RGBA);
+	gtk_object_add_arg_type ("ECanvasBackground::fill_stipple", GTK_TYPE_GDK_WINDOW,
+				 GTK_ARG_READWRITE, ARG_FILL_STIPPLE);
+	gtk_object_add_arg_type ("ECanvasBackground::x1", GTK_TYPE_DOUBLE,
+				 GTK_ARG_READWRITE, ARG_X1);
+	gtk_object_add_arg_type ("ECanvasBackground::x2", GTK_TYPE_DOUBLE,
+				 GTK_ARG_READWRITE, ARG_X2);
+	gtk_object_add_arg_type ("ECanvasBackground::y1", GTK_TYPE_DOUBLE,
+				 GTK_ARG_READWRITE, ARG_Y1);
+	gtk_object_add_arg_type ("ECanvasBackground::y2", GTK_TYPE_DOUBLE,
+				 GTK_ARG_READWRITE, ARG_Y2);
+}
+
+GtkType
+e_canvas_background_get_type (void)
+{
+	static GtkType type = 0;
+
+	if (!type){
+		GtkTypeInfo info = {
+			"ECanvasBackground",
+			sizeof (ECanvasBackground),
+			sizeof (ECanvasBackgroundClass),
+			(GtkClassInitFunc) ecb_class_init,
+			(GtkObjectInitFunc) ecb_init,
+			NULL, /* reserved 1 */
+			NULL, /* reserved 2 */
+			(GtkClassInitFunc) NULL
+		};
+
+		type = gtk_type_unique (PARENT_OBJECT_TYPE, &info);
+	}
+
+	return type;
+}