Add resizing capabilities.

1999-11-14  Miguel de Icaza  <miguel@gnu.org>

	* e-table-header-item.c (is_pointer_on_division): Add resizing
	capabilities.

	* e-table-sorted.c: Finish implementation.

1999-11-13  Miguel de Icaza  <miguel@gnu.org>

	* e-table-sorted.c: Implement e-table-sorted object.

1999-11-12  Miguel de Icaza  <miguel@gnu.org>

	* e-table-header-item.c: Make the thing configurable.

	* e-table-header-item.h: Add font field, location, height.

svn path=/trunk/; revision=1388

1 files changed, 268 insertions, 35 deletions

diff --git a/widgets/table/e-table-header-item.c b/widgets/table/e-table-header-item.c
index effdbb3f0b..50b0b6a677 100644
--- a/widgets/table/e-table-header-item.c
+++ b/widgets/table/e-table-header-item.c
@@ -1,16 +1,23 @@
 /*
- * E-table-column-view.c: A canvas view of the TableColumn.
+ * E-table-column-view.c: A canvas item based view of the ETableColumn.
  *
  * Author:
  *   Miguel de Icaza (miguel@gnu.org)
  *
- * Copyright 1999, International GNOME Support.
+ * Copyright 1999, Helix Code, Inc.
  */
 #include <config.h>
 #include "e-table-header.h"
 #include "e-table-header-item.h"
+#include "e-cursors.h"
 
-#define ETHI_HEIGHT 14
+/* Padding above and below of the string in the header display */
+#define PADDING 4
+
+/* Defines the tolerance for proximity of the column division to the cursor position */
+#define TOLERANCE 2
+
+#define ETHI_RESIZING(x) ((x)->resize_col != -1)
 
 #define PARENT_OBJECT_TYPE gnome_canvas_item_get_type ()
 
@@ -18,7 +25,10 @@ static GnomeCanvasItemClass *ethi_parent_class;
 
 enum {
 	ARG_0,
-	ARG_TABLE_HEADER
+	ARG_TABLE_HEADER,
+	ARG_TABLE_X,
+	ARG_TABLE_Y,
+	ARG_TABLE_FONTSET
 };
 
 static void
@@ -35,17 +45,33 @@ ethi_destroy (GtkObject *object)
 static void
 ethi_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
 {
+	ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
+	
 	if (GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->update)
 		(*GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->update)(item, affine, clip_path, flags);
 
-	item->x1 = 0;
-	item->y1 = 0;
+	item->x1 = ethi->x1;
+	item->y1 = ethi->y1;
 	item->x2 = INT_MAX;
-	item->y2 = INT_MAX;
+	item->y2 = ethi->x1 + ethi->height;
+
 	gnome_canvas_group_child_bounds (GNOME_CANVAS_GROUP (item->parent), item);
 }
 
 static void
+ethi_font_load (ETableHeaderItem *ethi, char *font)
+{
+	if (ethi->font)
+		gdk_font_unref (ethi->font);
+	
+	ethi->font = gdk_fontset_load (font);
+	if (ethi->font == NULL)
+		ethi->font = gdk_font_load ("fixed");
+	
+	ethi->height = ethi->font->ascent + ethi->font->descent + PADDING;
+}
+
+static void
 ethi_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 {
 	GnomeCanvasItem *item;
@@ -59,6 +85,19 @@ ethi_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
 	case ARG_TABLE_HEADER:
 		ethi->eth = GTK_VALUE_POINTER (*arg);
 		break;
+
+	case ARG_TABLE_X:
+		ethi->x1 = GTK_VALUE_INT (*arg);
+		break;
+
+	case ARG_TABLE_Y:
+		ethi->y1 = GTK_VALUE_INT (*arg);
+		break;
+
+	case ARG_TABLE_FONTSET:
+		ethi_font_load (ethi, GTK_VALUE_STRING (*arg));
+		break;
+		
 	}
 	ethi_update (item, NULL, NULL, 0);
 }
@@ -80,6 +119,9 @@ ethi_realize (GnomeCanvasItem *item)
 	gdk_gc_set_foreground (ethi->gc, &c);
 
 	ethi->normal_cursor = gdk_cursor_new (GDK_ARROW);
+
+	if (!ethi->font)
+		ethi_font_load (ethi, "fixed");
 }
 
 static void
@@ -101,6 +143,45 @@ ethi_unrealize (GnomeCanvasItem *item)
 }
 
 static void
+draw_button (ETableHeaderItem *ethi, ETableCol *col,
+	     GdkDrawable *drawable, GdkGC *gc, GtkStyle *style,
+	     int x, int y, int width, int height)
+{
+	GdkRectangle clip;
+	int xtra;
+	
+	gdk_draw_rectangle (
+		drawable, gc, TRUE,
+		x + 1, y + 1, width - 2, height -2);
+	
+	gtk_draw_shadow (
+		style, drawable, 
+		GTK_STATE_NORMAL, GTK_SHADOW_OUT,
+		x , y, width, height);
+
+	clip.x = x + 2;
+	clip.y = y + 2;
+	clip.width = width - 4;
+	clip.height = ethi->height;
+	
+	gdk_gc_set_clip_rectangle (ethi->gc, &clip);
+
+	/* Center the thing */
+	xtra = (clip.width - gdk_string_measure (ethi->font, col->id))/2;
+
+	if (xtra < 0)
+		xtra = 0;
+	
+	/* Skip over border */
+	x += xtra + 2;
+	
+	gdk_draw_text (
+		drawable, ethi->font,
+		ethi->gc, x, y + ethi->height - PADDING,
+		col->id, strlen (col->id));
+}
+
+static void
 ethi_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x1, int y1, int width, int height)
 {
 	ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
@@ -112,11 +193,17 @@ ethi_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x1, int y1, int wid
 	int x;
 
 	total = 0;
-	x = 0;
+	x = -x1;
+
 	for (col = 0; col < cols; col++){
 		ETableCol *ecol = e_table_header_get_column (ethi->eth, col);
-		const int col_width = ecol->width;
+		int col_width;
 
+		if (col == ethi->resize_col)
+			col_width = ethi->resize_width;
+		else
+			col_width = ecol->width;
+				
 		if (x1 > total + col_width){
 			x += col_width;
 			continue;
@@ -127,32 +214,11 @@ ethi_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x1, int y1, int wid
 
 		gc = GTK_WIDGET (canvas)->style->bg_gc [GTK_STATE_ACTIVE];
 
-		gdk_draw_rectangle (
-			drawable, gc, TRUE,
-			x + 1, -y1 + 1, col_width - 2, ETHI_HEIGHT - 2);
-			
-		gtk_draw_shadow (
-			GTK_WIDGET (canvas)->style, drawable,
-			GTK_STATE_NORMAL, GTK_SHADOW_OUT,
-			x , -y1, col_width, ETHI_HEIGHT);
-
-		{
-			GdkRectangle clip;
-			GdkFont *font = GTK_WIDGET (canvas)->style->font;
-			
-			clip.x = x + 2;
-			clip.y = -y1 + 2;
-			clip.width = col_width - 4;
-			clip.height = ETHI_HEIGHT - 4;
-			gdk_gc_set_clip_rectangle (gc, &clip);
+		draw_button (ethi, ecol, drawable, gc,
+			     GTK_WIDGET (canvas)->style,
+			     x, -y1, col_width, ethi->height);
 
-			/*
-			 * FIXME: should be obvious
-			 */
-			gdk_draw_text (drawable, font, gc, x, -y1 + 10, "TEST", 4);
-			
-			gdk_gc_set_clip_rectangle (gc, NULL);
-		}
+		x += col_width;
 	}
 }
 
@@ -164,10 +230,167 @@ ethi_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
 	return 0.0;
 }
 
+/*
+ * is_pointer_on_division:
+ *
+ * Returns whether @pos is a column header division;  If @the_total is not NULL,
+ * then the actual position is returned here.  If @return_ecol is not NULL,
+ * then the ETableCol that actually contains this point is returned here
+ */
+static gboolean
+is_pointer_on_division (ETableHeaderItem *ethi, int pos, int *the_total, int *return_col)
+{
+	const int cols = e_table_header_count (ethi->eth);
+	int col, total;
+
+	total = 0;
+	for (col = 0; col < cols; col++){
+		ETableCol *ecol = e_table_header_get_column (ethi->eth, col);
+
+		total += ecol->width;
+
+		if ((total - TOLERANCE < pos ) && (pos < total + TOLERANCE)){
+			if (return_col)
+				*return_col = col;
+			if (the_total)
+				*the_total = total;
+
+			return TRUE;
+		}
+
+		if (total > pos + TOLERANCE)
+			return FALSE;
+	}
+
+	return FALSE;
+}
+
+#define convert(c,sx,sy,x,y) gnome_canvas_w2c (c,sx,sy,x,y)
+
+static void
+set_cursor (ETableHeaderItem *ethi, int pos)
+{
+	GtkWidget *canvas = GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas);
+		
+	/* We might be invoked before we are realized */
+	if (!canvas->window)
+		return;
+
+	if (is_pointer_on_division (ethi, pos, NULL, NULL))
+		e_cursor_set (canvas->window, E_CURSOR_SIZE_X);
+	else
+		e_cursor_set (canvas->window, E_CURSOR_ARROW);
+}
+
+static void
+ethi_request_redraw (ETableHeaderItem *ethi)
+{
+	GnomeCanvas *canvas = GNOME_CANVAS_ITEM (ethi)->canvas;
+	
+	/*
+	 * request a redraw
+	 */
+	gnome_canvas_request_redraw (
+		canvas, ethi->x1, ethi->y1, INT_MAX, ethi->x1 + ethi->height);
+}
+
+static void
+ethi_end_resize (ETableHeaderItem *ethi, int new_size)
+{
+	e_table_header_set_size (ethi->eth, ethi->resize_col, new_size);
+
+	if (ethi->resize_guide){
+#warning Fix this
+		/* gtk_object_destroy (ethi->resize_guide);*/
+		ethi->resize_guide = NULL;
+	}
+	ethi->resize_col = -1;
+	ethi_request_redraw (ethi);
+}
+
+/*
+ * Handles the events on the ETableHeaderItem, particularly it handles resizing
+ */
 static int
 ethi_event (GnomeCanvasItem *item, GdkEvent *e)
 {
+	ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
+	GnomeCanvas *canvas = item->canvas;
+	const gboolean resizing = ETHI_RESIZING (ethi);
+	int x, y, start, col;
+	
 	switch (e->type){
+	case GDK_ENTER_NOTIFY:
+		convert (canvas, e->crossing.x, e->crossing.y, &x, &y);
+		set_cursor (ethi, x);
+		break;
+
+	case GDK_MOTION_NOTIFY:
+		convert (canvas, e->motion.x, e->motion.y, &x, &y);
+		if (resizing){
+			if (ethi->resize_guide == NULL){
+				/* Quick hack until I actually bind the views */
+				ethi->resize_guide = GINT_TO_POINTER (1);
+				gnome_canvas_item_grab (item,
+							GDK_POINTER_MOTION_MASK |
+							GDK_BUTTON_RELEASE_MASK,
+							e_cursor_get (E_CURSOR_SIZE_X),
+							e->button.time);
+			}
+
+			if (x - ethi->resize_start_pos <= 0)
+				break;
+			
+			ethi->resize_width = x - ethi->resize_start_pos;
+			
+			ethi_request_redraw (ethi);
+		} else
+			set_cursor (ethi, x);
+		break;
+		
+	case GDK_BUTTON_PRESS:
+		convert (canvas, e->button.x, e->button.y, &x, &y);
+
+		if (is_pointer_on_division (ethi, x, &start, &col)){
+			ETableCol *ecol;
+			
+			/*
+			 * Record the important bits.
+			 *
+			 * By setting resize_pos to a non -1 value,
+			 * we know that we are being resized (used in the
+			 * other event handlers).
+			 */
+			ecol = e_table_header_get_column (ethi->eth, col);
+			ethi->resize_col = col;
+			ethi->resize_width = ecol->width;
+			ethi->resize_start_pos = start - ecol->width;
+		}
+		break;
+
+	case GDK_2BUTTON_PRESS:
+		if (!resizing)
+			break;
+
+		if (e->button.button != 1)
+			break;
+
+		printf ("Resize this guy\n");
+		break;
+		
+	case GDK_BUTTON_RELEASE: {
+		gboolean needs_ungrab = FALSE;
+
+		if (ethi->resize_col != -1){
+			needs_ungrab = (ethi->resize_guide != NULL);
+			ethi_end_resize (ethi, ethi->resize_width);
+		}
+		if (needs_ungrab)
+			gnome_canvas_item_ungrab (item, e->button.time);
+
+		break;
+	}
+	
 	default:
 		return FALSE;
 	}
@@ -179,7 +402,7 @@ ethi_class_init (GtkObjectClass *object_class)
 {
 	GnomeCanvasItemClass *item_class = (GnomeCanvasItemClass *) object_class;
 
-	ethi_parent_class = gtk_type_class (gnome_canvas_item_get_type ());
+	ethi_parent_class = gtk_type_class (PARENT_OBJECT_TYPE);
 	
 	object_class->destroy = ethi_destroy;
 	object_class->set_arg = ethi_set_arg;
@@ -193,11 +416,21 @@ ethi_class_init (GtkObjectClass *object_class)
 	
 	gtk_object_add_arg_type ("ETableHeaderItem::ETableHeader", GTK_TYPE_POINTER,
 				 GTK_ARG_WRITABLE, ARG_TABLE_HEADER);
+	gtk_object_add_arg_type ("ETableHeaderItem::x", GTK_TYPE_INT,
+				 GTK_ARG_WRITABLE, ARG_TABLE_X);
+	gtk_object_add_arg_type ("ETableHeaderItem::y", GTK_TYPE_INT,
+				 GTK_ARG_WRITABLE, ARG_TABLE_Y);
+	gtk_object_add_arg_type ("ETableHeaderItem::fontset", GTK_TYPE_STRING,
+				 GTK_ARG_WRITABLE, ARG_TABLE_FONTSET);
 }
 
 static void
 ethi_init (GnomeCanvasItem *item)
 {
+	ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
+
+	ethi->resize_col = -1;
+
 	item->x1 = 0;
 	item->y1 = 0;
 	item->x2 = 0;