new file, implements the ECellProgress object.

2002-01-16  Krisztian Pifko  <monsta@users.sourceforge.net>

	* e-cell-progress.c, e-cell-progress.h: new file, implements the
	ECellProgress object.

	* Makefile.am (libetable_la_SOURCES, libetableinclude_HEADERS):
	added e-cell-progress.c and e-cell-progress.h.

svn path=/trunk/; revision=15341

2 files changed, 524 insertions, 0 deletions

diff --git a/widgets/table/e-cell-progress.c b/widgets/table/e-cell-progress.c
new file mode 100644
index 0000000000..41edac7ef3
--- /dev/null
+++ b/widgets/table/e-cell-progress.c
@@ -0,0 +1,450 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * e-cell-progress.c - Progress display cell object.
+ * Copyright 1999-2002, Ximian, Inc.
+ * Copyright 2001, 2002, Krisztian Pifko <monsta@users.sourceforge.net>
+ *
+ * Authors:
+ *   Krisztian Pifko <monsta@users.sourceforge.net>
+ *
+ * A cell type for displaying progress bars.
+ *
+ * Derived from ECellToggle of Miguel de Icaza <miguel@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 <gtk/gtkenums.h>
+#include <gtk/gtkentry.h>
+#include <gtk/gtkwindow.h>
+#include <gtk/gtksignal.h>
+#include <gdk/gdkkeysyms.h>
+#include <libgnomeui/gnome-canvas.h>
+#include "e-cell-progress.h"
+#include "gal/util/e-util.h"
+#include "e-table-item.h"
+
+#define PARENT_TYPE e_cell_get_type ()
+
+typedef struct {
+	ECellView    cell_view;
+	GdkGC       *gc;
+	GnomeCanvas *canvas;
+} ECellProgressView;
+
+static ECellClass *parent_class;
+
+static void
+eprog_queue_redraw (ECellProgressView *text_view, int view_col, int view_row)
+{
+	e_table_item_redraw_range (
+		text_view->cell_view.e_table_item_view,
+		view_col, view_row, view_col, view_row);
+}
+
+/*
+ * ECell::realize method
+ */
+static ECellView *
+eprog_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
+{
+	ECellProgressView *progress_view = g_new0 (ECellProgressView, 1);
+	ETableItem *eti = E_TABLE_ITEM (e_table_item_view);
+	GnomeCanvas *canvas = GNOME_CANVAS_ITEM (eti)->canvas;
+	
+	progress_view->cell_view.ecell = ecell;
+	progress_view->cell_view.e_table_model = table_model;
+	progress_view->cell_view.e_table_item_view = e_table_item_view;
+	progress_view->canvas = canvas;
+	
+	return (ECellView *) progress_view;
+}
+
+static void
+eprog_kill_view (ECellView *ecell_view)
+{
+	g_free (ecell_view);
+}	
+
+static void
+eprog_realize (ECellView *ecell_view)
+{
+	ECellProgressView *progress_view = (ECellProgressView *) ecell_view;
+
+	progress_view->gc = gdk_gc_new (GTK_WIDGET (progress_view->canvas)->window);
+}
+
+/*
+ * ECell::unrealize method
+ */
+static void
+eprog_unrealize (ECellView *ecv)
+{
+	ECellProgressView *progress_view = (ECellProgressView *) ecv;
+
+	gdk_gc_unref (progress_view->gc);
+	progress_view->gc = NULL;
+}
+
+static void
+eprog_clear (ECellProgress *progress)
+{
+  memset(progress->buffer,0x00,progress->width*progress->height*4);  
+}
+
+static void
+eprog_draw_border (ECellProgress *progress, guchar red, guchar green, guchar blue)
+{
+  gint i, j, w4, p4, pw4, wpb4, hp1;
+
+/*
+ * some speedup
+ */
+  w4=progress->width*4;
+  p4=progress->padding*4;
+  pw4=w4*progress->padding;
+  wpb4=(progress->width-progress->padding-progress->border)*4;
+  hp1=(progress->height-progress->padding-1);
+
+  for (i=progress->padding*4;i<(progress->width-progress->padding)*4;i+=4){
+    for (j=0;j<progress->border;j++){
+      progress->buffer[pw4+j*w4+i]=red;
+      progress->buffer[pw4+j*w4+i+1]=green;
+      progress->buffer[pw4+j*w4+i+2]=blue;
+      progress->buffer[pw4+j*w4+i+3]=255;
+      progress->buffer[(progress->height-1-progress->padding)*w4-j*w4+i]=red;
+      progress->buffer[(progress->height-1-progress->padding)*w4-j*w4+i+1]=green;
+      progress->buffer[(progress->height-1-progress->padding)*w4-j*w4+i+2]=blue;
+      progress->buffer[(progress->height-1-progress->padding)*w4-j*w4+i+3]=255;
+    }
+  }
+  for (i=progress->padding+progress->border;i<progress->height-progress->padding-progress->border;i++){
+    for (j=0;j<4*progress->border;j+=4){
+      progress->buffer[p4+i*w4+j]=red;
+      progress->buffer[p4+i*w4+j+1]=green;
+      progress->buffer[p4+i*w4+j+2]=blue;
+      progress->buffer[p4+i*w4+j+3]=255;
+      progress->buffer[i*w4+wpb4+j]=red;
+      progress->buffer[i*w4+wpb4+j+1]=green;
+      progress->buffer[i*w4+wpb4+j+2]=blue;
+      progress->buffer[i*w4+wpb4+j+3]=255;
+    }
+  }
+}
+
+static void
+eprog_draw_bar (ECellProgress *progress, guchar red, guchar green, guchar blue, gint value)
+{
+  gint i, j, w;
+  
+  w=value*(progress->width-2*(progress->padding+progress->border+1))/progress->max;
+  for (i=(progress->padding+progress->border+1)*4;i<(progress->padding+progress->border+1+w)*4;i+=4){
+    for (j=0;j<progress->height-2*(progress->padding+progress->border+1);j++){
+      progress->buffer[(progress->width*(progress->padding+progress->border+1)*4)+j*progress->width*4+i]=red;
+      progress->buffer[(progress->width*(progress->padding+progress->border+1)*4)+j*progress->width*4+i+1]=green;
+      progress->buffer[(progress->width*(progress->padding+progress->border+1)*4)+j*progress->width*4+i+2]=blue;
+      progress->buffer[(progress->width*(progress->padding+progress->border+1)*4)+j*progress->width*4+i+3]=255;
+    }
+  }
+}
+
+/*
+ * ECell::draw method
+ */
+static void
+eprog_draw (ECellView *ecell_view, GdkDrawable *drawable,
+	  int model_col, int view_col, int row, ECellFlags flags,
+	  int x1, int y1, int x2, int y2)
+{
+	ECellProgress *progress = E_CELL_PROGRESS (ecell_view->ecell);
+	gboolean selected;
+	GdkPixbuf *image;
+	int x, y, width, height;
+	
+	const int value = GPOINTER_TO_INT (
+		 e_table_model_value_at (ecell_view->e_table_model, model_col, row));
+	
+	selected = flags & E_CELL_SELECTED;
+
+	if ((value > progress->max)||(value < progress->min)){
+		g_warning ("Value from the table model is %d, the states we support are [%d..%d]\n",
+			   value, progress->min, progress->max);
+		return;
+	}
+
+	image = progress->image;
+
+	if ((x2 - x1) < progress->width){
+		x = x1;
+		width = x2 - x1;
+	} else {
+		x = x1 + ((x2 - x1) - progress->width) / 2;
+		width = progress->width;
+	}
+
+	if ((y2 - y1) < progress->height){
+		y = y1;
+		height = y2 - y1;
+	} else {
+		y = y1 + ((y2 - y1) - progress->height) / 2;
+		height = progress->height;
+	}
+
+	eprog_clear(progress);
+
+	eprog_draw_border(progress, progress->red, progress->green, progress->blue);
+
+	eprog_draw_bar(progress, progress->red, progress->green, progress->blue, value);
+
+	gdk_pixbuf_render_to_drawable_alpha (progress->image, drawable,
+					     0, 0,
+					     x, y,
+					     progress->width, progress->height,
+					     GDK_PIXBUF_ALPHA_BILEVEL,
+					     128,
+					     GDK_RGB_DITHER_NORMAL,
+					     x, y);
+}
+
+static void
+eprog_set_value (ECellProgressView *progress_view, int model_col, int view_col, int row, int value)
+{
+	ECell *ecell = progress_view->cell_view.ecell;
+	ECellProgress *progress = E_CELL_PROGRESS (ecell);
+
+	if (value > progress->max){
+	  value = progress->max;
+	}else if (value < progress->min){
+	  value = progress->min;
+	}
+	e_table_model_set_value_at (progress_view->cell_view.e_table_model,
+				    model_col, row, GINT_TO_POINTER (value));
+	eprog_queue_redraw (progress_view, view_col, row);
+}
+
+/*
+ * ECell::event method
+ */
+static gint
+eprog_event (ECellView *ecell_view, GdkEvent *event, int model_col, int view_col, int row, ECellFlags flags, ECellActions *actions)
+{
+	ECellProgressView *progress_view = (ECellProgressView *) ecell_view;
+	void *_value = e_table_model_value_at (ecell_view->e_table_model, model_col, row);
+	const int value = GPOINTER_TO_INT (_value);
+
+#if 0
+	if (!(flags & E_CELL_EDITING))
+		return FALSE;
+#endif
+
+	switch (event->type){
+	case GDK_KEY_PRESS:
+		if (event->key.keyval != GDK_space)
+			return FALSE;
+		/* Fall through */
+	case GDK_BUTTON_PRESS:
+		if (!e_table_model_is_cell_editable(ecell_view->e_table_model, model_col, row))
+			return FALSE;
+		
+		eprog_set_value (progress_view, model_col, view_col, row, value + 1);
+		return TRUE;
+
+	default:
+		return FALSE;
+	}
+	return TRUE;
+}
+
+/*
+ * ECell::height method
+ */
+static int
+eprog_height (ECellView *ecell_view, int model_col, int view_col, int row)
+{
+	ECellProgress *progress = E_CELL_PROGRESS (ecell_view->ecell);
+
+	return progress->height;
+}
+
+/*
+ * ECell::max_width method
+ */
+static int
+eprog_max_width (ECellView *ecell_view, int model_col, int view_col)
+{
+	ECellProgress *progress = E_CELL_PROGRESS (ecell_view->ecell);
+
+	return progress->width;
+}
+
+static void
+eprog_destroy (GtkObject *object)
+{
+	ECellProgress *eprog = E_CELL_PROGRESS (object);
+	
+	gdk_pixbuf_unref (eprog->image);
+	g_free (eprog->image);
+	g_free (eprog->buffer);
+
+	GTK_OBJECT_CLASS (parent_class)->destroy (object);
+}
+
+static void
+e_cell_progress_class_init (GtkObjectClass *object_class)
+{
+	ECellClass *ecc = (ECellClass *) object_class;
+
+	object_class->destroy = eprog_destroy;
+
+	ecc->new_view   = eprog_new_view;
+	ecc->kill_view  = eprog_kill_view;
+	ecc->realize    = eprog_realize;
+	ecc->unrealize  = eprog_unrealize;
+	ecc->draw       = eprog_draw;
+	ecc->event      = eprog_event;
+	ecc->height     = eprog_height;
+	ecc->max_width  = eprog_max_width;
+
+	parent_class = gtk_type_class (PARENT_TYPE);
+}
+
+E_MAKE_TYPE(e_cell_progress, "ECellProgress", ECellProgress, e_cell_progress_class_init, NULL, PARENT_TYPE);
+
+/**
+ * e_cell_progress_construct:
+ * @eprog: a fresh ECellProgress object
+ * @padding: number of pixels used as a padding
+ * @border: number of pixels used as a border
+ * @min: the minimum value
+ * @max: the maximum value
+ * @width: the width of the progress bar in pixels
+ * @height: the height of the progress bar in pixels
+ * @red: the red component of the progress bars rgb color
+ * @green: the green component of the progress bars rgb color
+ * @blue: the blue component of the progress bars rgb color
+ *
+ * Constructs the @eprog object with the arguments
+ */
+void
+e_cell_progress_construct (ECellProgress *eprog, int padding, int border, int min, int max, int width, int height, guchar red, guchar green, guchar blue)
+{
+	eprog->padding = padding;
+	eprog->border = border;
+	eprog->min = min;
+	eprog->max = max;
+	eprog->red = red;
+	eprog->green = green;
+	eprog->blue = blue;
+
+	eprog->width = (width<((padding+border)*2+5)) ? ((padding+border)*2+5) : width;
+	eprog->height = (height<((padding+border)*2+5)) ? ((padding+border)*2+5) : height;
+
+	eprog->buffer=g_new(guchar, eprog->width*eprog->height*4);
+
+	eprog_clear(eprog);
+	eprog_draw_border(eprog, red, green, blue);
+
+	eprog->image = gdk_pixbuf_new_from_data (eprog->buffer,GDK_COLORSPACE_RGB, TRUE, 8, eprog->width, eprog->height, eprog->width*4, NULL, NULL);
+}
+
+/**
+ * e_cell_progress_new:
+ * @min: the minimum value
+ * @max: the maximum value
+ * @width: the width of the progress bar in pixels
+ * @height: the height of the progress bar in pixels
+ *
+ * Creates a new ECell renderer that can be used to render progress
+ * bars displaying the percentage of the current value between min
+ * and max.
+ * 
+ * Returns: an ECell object that can be used to render progress cells.
+ */
+ECell *
+e_cell_progress_new (int min, int max, int width, int height)
+{
+	ECellProgress *eprog = gtk_type_new (e_cell_progress_get_type ());
+
+	e_cell_progress_construct (eprog, 1, 1, min, max, (width<9) ? 9 : width, (height<9) ? 9 : height, 0x00, 0x00, 0x00);
+
+	return (ECell *) eprog;
+}
+
+/**
+ * e_cell_progress_set_padding:
+ * @eprog: an ECellProgress object
+ * @padding: number of pixels used as a padding
+ *
+ * Sets the padding around the progress bar in the cell.
+ */
+void
+e_cell_progress_set_padding (ECellProgress *eprog, int padding)
+{
+	eprog->padding = padding;
+
+	eprog->width = (eprog->width<((padding+eprog->border)*2+5)) ? ((padding+eprog->border)*2+5) : eprog->width;
+	eprog->height = (eprog->height<((padding+eprog->border)*2+5)) ? ((padding+eprog->border)*2+5) : eprog->height;
+
+	g_free (eprog->buffer);
+	eprog->buffer=g_new (guchar, eprog->width*eprog->height*4);
+
+	eprog_clear (eprog);
+	eprog_draw_border (eprog, eprog->red, eprog->green, eprog->blue);
+
+	eprog->image = gdk_pixbuf_new_from_data (eprog->buffer,GDK_COLORSPACE_RGB, TRUE, 8, eprog->width, eprog->height, eprog->width*4, NULL, NULL);
+}
+
+/**
+ * e_cell_progress_set_border:
+ * @eprog: an ECellProgress object
+ * @border: number of pixels used as a border
+ *
+ * Sets the border around the progress bar in the cell.
+ */
+void
+e_cell_progress_set_border (ECellProgress *eprog, int border)
+{
+	eprog->border = border;
+
+	eprog->width = (eprog->width<((eprog->padding+border)*2+5)) ? ((eprog->padding+border)*2+5) : eprog->width;
+	eprog->height = (eprog->height<((eprog->padding+border)*2+5)) ? ((eprog->padding+border)*2+5) : eprog->height;
+
+	g_free (eprog->buffer);
+	eprog->buffer=g_new (guchar, eprog->width*eprog->height*4);
+
+	eprog_clear (eprog);
+	eprog_draw_border (eprog, eprog->red, eprog->green, eprog->blue);
+
+	eprog->image = gdk_pixbuf_new_from_data (eprog->buffer,GDK_COLORSPACE_RGB, TRUE, 8, eprog->width, eprog->height, eprog->width*4, NULL, NULL);
+}
+
+/**
+ * e_cell_progress_set_color:
+ * @eprog: a fresh ECellProgress object
+ * @red: the red component of the progress bars rgb color
+ * @green: the green component of the progress bars rgb color
+ * @blue: the blue component of the progress bars rgb color
+ */
+void
+e_cell_progress_set_color (ECellProgress *eprog, guchar red, guchar green, guchar blue)
+{
+	eprog->red = red;
+	eprog->green = green;
+	eprog->blue = blue;
+
+	eprog_clear (eprog);
+	eprog_draw_border (eprog, red, green, blue);
+}
diff --git a/widgets/table/e-cell-progress.h b/widgets/table/e-cell-progress.h
new file mode 100644
index 0000000000..4cd09ed0de
--- /dev/null
+++ b/widgets/table/e-cell-progress.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* 
+ * e-cell-progress.h - Progress display cell object.
+ * Copyright 1999-2002, Ximian, Inc.
+ * Copyright 2001, 2002, Krisztian Pifko <monsta@users.sourceforge.net>
+ *
+ * Authors:
+ *   Krisztian Pifko <monsta@users.sourceforge.net>
+ *
+ * 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.
+ */
+
+#ifndef _E_CELL_PROGRESS_H_
+#define _E_CELL_PROGRESS_H_
+
+#include <libgnomeui/gnome-canvas.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gal/e-table/e-cell.h>
+
+BEGIN_GNOME_DECLS
+
+#define E_CELL_PROGRESS_TYPE        (e_cell_progress_get_type ())
+#define E_CELL_PROGRESS(o)          (GTK_CHECK_CAST ((o), E_CELL_PROGRESS_TYPE, ECellProgress))
+#define E_CELL_PROGRESS_CLASS(k)    (GTK_CHECK_CLASS_CAST((k), E_CELL_PROGRESS_TYPE, ECellProgressClass))
+#define E_IS_CELL_PROGRESS(o)       (GTK_CHECK_TYPE ((o), E_CELL_PROGRESS_TYPE))
+#define E_IS_CELL_PROGRESS_CLASS(k) (GTK_CHECK_CLASS_TYPE ((k), E_CELL_PROGRESS_TYPE))
+
+typedef struct {
+	ECell parent;
+
+	int        padding;
+	int        border;
+	int        min;
+	int        max;
+	guchar 	   red;
+	guchar 	   green;
+	guchar 	   blue;
+
+	guchar *buffer;
+	GdkPixbuf *image;
+
+	int        width;
+	int        height;
+} ECellProgress;
+
+typedef struct {
+	ECellClass parent_class;
+} ECellProgressClass;
+
+GtkType    e_cell_progress_get_type  (void);
+ECell     *e_cell_progress_new       (int min, int max, int width, int height);
+void       e_cell_progress_construct (ECellProgress *eprog, int padding, int border,
+				      int min, int max, int width, int height, guchar red, guchar green, guchar blue);
+void	   e_cell_progress_set_padding (ECellProgress *eprog, int padding);
+void	   e_cell_progress_set_border (ECellProgress *eprog, int border);
+void	   e_cell_progress_set_color (ECellProgress *eprog, guchar red, guchar green, guchar blue);
+
+END_GNOME_DECLS
+
+#endif /* _E_CELL_PROGRESS_H_ */
+
+