summaryrefslogtreecommitdiff
path: root/gladeui/glade-placeholder.c
blob: f7605b60d6dbf5e64ddc9ab31925cb69d2e11348 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2003, 2004 Joaquin Cuenca Abela
 *
 * Authors:
 *   Joaquin Cuenca Abela <e98cuenc@yahoo.com> 
 * 
 * This program 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.
 *
 * This program 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"

/**
 * SECTION:glade-placeholder
 * @Short_Description: A #GtkWidget to fill empty places.
 *
 * Generally in Glade, container widgets are implemented with #GladePlaceholder 
 * children to allow users to 'click' and add thier widgets to a container. 
 * It is the responsability of the plugin writer to create placeholders for 
 * container widgets where appropriate; usually in #GladePostCreateFunc 
 * when the #GladeCreateReason is %GLADE_CREATE_USER.
 */

#include <gtk/gtk.h>
#include "glade.h"
#include "glade-placeholder.h"
#include "glade-xml-utils.h"
#include "glade-project.h"
#include "glade-command.h"
#include "glade-palette.h"
#include "glade-popup.h"
#include "glade-cursor.h"
#include "glade-widget.h"
#include "glade-app.h"

#define WIDTH_REQUISITION    20
#define HEIGHT_REQUISITION   20

static void      glade_placeholder_finalize       (GObject           *object);

static void      glade_placeholder_realize        (GtkWidget         *widget);

static void      glade_placeholder_size_allocate  (GtkWidget         *widget,
					           GtkAllocation     *allocation);
					      
static void      glade_placeholder_send_configure (GladePlaceholder  *placeholder);

static gboolean  glade_placeholder_expose         (GtkWidget         *widget,
					           GdkEventExpose    *event);
					      
static gboolean  glade_placeholder_motion_notify_event (GtkWidget      *widget,
						        GdkEventMotion *event);
						       
static gboolean  glade_placeholder_button_press        (GtkWidget      *widget,
						        GdkEventButton *event);
						
static gboolean  glade_placeholder_popup_menu          (GtkWidget      *widget);


static char *placeholder_xpm[] = {
	/* columns rows colors chars-per-pixel */
	"8 8 2 1",
	"  c #bbbbbb",
	". c #d6d6d6",
	/* pixels */
	" .  .   ",
	".    .  ",
	"      ..",
	"      ..",
	".    .  ",
	" .  .   ",
	"  ..    ",
	"  ..    "
};

G_DEFINE_TYPE (GladePlaceholder, glade_placeholder, GTK_TYPE_WIDGET)

static void
glade_placeholder_class_init (GladePlaceholderClass *klass)
{
	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
	GObjectClass *object_class = G_OBJECT_CLASS (klass);

	object_class->finalize = glade_placeholder_finalize;
	widget_class->realize = glade_placeholder_realize;
	widget_class->size_allocate = glade_placeholder_size_allocate;
	widget_class->expose_event = glade_placeholder_expose;
	widget_class->motion_notify_event = glade_placeholder_motion_notify_event;
	widget_class->button_press_event = glade_placeholder_button_press;
	widget_class->popup_menu = glade_placeholder_popup_menu;
}

static void
glade_placeholder_notify_parent (GObject    *gobject,
				 GParamSpec *arg1,
				 gpointer    user_data)
{
	GladePlaceholder *placeholder = GLADE_PLACEHOLDER (gobject);
	GladeWidget *parent = glade_placeholder_get_parent (placeholder);
	
	if (placeholder->packing_actions)
	{
		g_list_foreach (placeholder->packing_actions, (GFunc)g_object_unref, NULL);
		g_list_free (placeholder->packing_actions);
		placeholder->packing_actions = NULL;
	}
	
	if (parent && parent->adaptor->packing_actions)
		placeholder->packing_actions = glade_widget_adaptor_pack_actions_new (parent->adaptor);	
}

static void
glade_placeholder_init (GladePlaceholder *placeholder)
{
	placeholder->placeholder_pixmap = NULL;
	placeholder->packing_actions = NULL;

	GTK_WIDGET_SET_FLAGS (GTK_WIDGET (placeholder), GTK_CAN_FOCUS);

	gtk_widget_set_size_request (GTK_WIDGET (placeholder),
				     WIDTH_REQUISITION,
				     HEIGHT_REQUISITION);

	g_signal_connect (placeholder, "notify::parent",
			  G_CALLBACK (glade_placeholder_notify_parent),
			  NULL);
	
	gtk_widget_show (GTK_WIDGET (placeholder));
}

/**
 * glade_placeholder_new:
 * 
 * Returns: a new #GladePlaceholder cast as a #GtkWidget
 */
GtkWidget *
glade_placeholder_new (void)
{
	return g_object_new (GLADE_TYPE_PLACEHOLDER, NULL);
}

static void
glade_placeholder_finalize (GObject *object)
{
	GladePlaceholder *placeholder;

	g_return_if_fail (GLADE_IS_PLACEHOLDER (object));
	placeholder = GLADE_PLACEHOLDER (object);

	/* placeholder->placeholder_pixmap can be NULL if the placeholder is 
         * destroyed before it's realized */
	if (placeholder->placeholder_pixmap)
		g_object_unref (placeholder->placeholder_pixmap);

	if (placeholder->packing_actions)
	{
		g_list_foreach (placeholder->packing_actions, (GFunc)g_object_unref, NULL);
		g_list_free (placeholder->packing_actions);
	}
	
	G_OBJECT_CLASS (glade_placeholder_parent_class)->finalize (object);
}

static void
glade_placeholder_realize (GtkWidget *widget)
{
	GladePlaceholder *placeholder;
	GdkWindowAttr attributes;
	gint attributes_mask;

	g_return_if_fail (GLADE_IS_PLACEHOLDER (widget));

	placeholder = GLADE_PLACEHOLDER (widget);

	GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);

	attributes.window_type = GDK_WINDOW_CHILD;
	attributes.x = widget->allocation.x;
	attributes.y = widget->allocation.y;
	attributes.width = widget->allocation.width;
	attributes.height = widget->allocation.height;
	attributes.wclass = GDK_INPUT_OUTPUT;
	attributes.visual = gtk_widget_get_visual (widget);
	attributes.colormap = gtk_widget_get_colormap (widget);
	attributes.event_mask = 
		gtk_widget_get_events (widget) |
		GDK_EXPOSURE_MASK              |
		GDK_BUTTON_PRESS_MASK          |
		GDK_BUTTON_RELEASE_MASK        |
		GDK_POINTER_MOTION_MASK;

	attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;

	widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
	gdk_window_set_user_data (widget->window, placeholder);

	widget->style = gtk_style_attach (widget->style, widget->window);

	glade_placeholder_send_configure (GLADE_PLACEHOLDER (widget));

	if (!placeholder->placeholder_pixmap)
	{
		placeholder->placeholder_pixmap = gdk_pixmap_colormap_create_from_xpm_d (NULL,
									    gtk_widget_get_colormap (GTK_WIDGET (placeholder)),
									    NULL, NULL, placeholder_xpm);
		g_assert(G_IS_OBJECT(placeholder->placeholder_pixmap));
	}

	gdk_window_set_back_pixmap (GTK_WIDGET (placeholder)->window, placeholder->placeholder_pixmap, FALSE);
}

static void
glade_placeholder_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
{
	g_return_if_fail (GLADE_IS_PLACEHOLDER (widget));
	g_return_if_fail (allocation != NULL);

	widget->allocation = *allocation;

	if (GTK_WIDGET_REALIZED (widget))
	{
		gdk_window_move_resize (widget->window,
					allocation->x, allocation->y,
					allocation->width, allocation->height);

		glade_placeholder_send_configure (GLADE_PLACEHOLDER (widget));
	}
}

static void
glade_placeholder_send_configure (GladePlaceholder *placeholder)
{
	GtkWidget *widget;
	GdkEvent *event = gdk_event_new (GDK_CONFIGURE);

	widget = GTK_WIDGET (placeholder);

	event->configure.window = g_object_ref (widget->window);
	event->configure.send_event = TRUE;
	event->configure.x = widget->allocation.x;
	event->configure.y = widget->allocation.y;
	event->configure.width = widget->allocation.width;
	event->configure.height = widget->allocation.height;

	gtk_widget_event (widget, event);
	gdk_event_free (event);
}

static GladeProject*
glade_placeholder_get_project (GladePlaceholder *placeholder)
{
	GladeWidget *parent;
	parent = glade_placeholder_get_parent (placeholder);
	return parent ? GLADE_PROJECT (parent->project) : NULL;
}

static gboolean
glade_placeholder_expose (GtkWidget *widget, GdkEventExpose *event)
{
	GdkGC *light_gc;
	GdkGC *dark_gc;
	gint w, h;

	g_return_val_if_fail (GLADE_IS_PLACEHOLDER (widget), FALSE);
	
	light_gc = widget->style->light_gc[GTK_STATE_NORMAL];
	dark_gc  = widget->style->dark_gc[GTK_STATE_NORMAL];
	gdk_drawable_get_size (event->window, &w, &h);

	gdk_draw_line (event->window, light_gc, 0, 0, w - 1, 0);
	gdk_draw_line (event->window, light_gc, 0, 0, 0, h - 1);
	gdk_draw_line (event->window, dark_gc, 0, h - 1, w - 1, h - 1);
	gdk_draw_line (event->window, dark_gc, w - 1, 0, w - 1, h - 1);

	glade_util_draw_selection_nodes (event->window);

	return FALSE;
}

static gboolean                                                                 
glade_placeholder_motion_notify_event (GtkWidget *widget, GdkEventMotion *event)
{
	GladePointerMode    pointer_mode;
	GladeWidget        *gparent;

	g_return_val_if_fail (GLADE_IS_PLACEHOLDER (widget), FALSE);

	gparent = glade_placeholder_get_parent (GLADE_PLACEHOLDER (widget));
	pointer_mode = glade_app_get_pointer_mode ();

	if (pointer_mode == GLADE_POINTER_SELECT && 
	    /* If we are the child of a widget that is in a GladeFixed, then
	     * we are the means of drag/resize and we dont want to fight for
	     * the cursor (ideally; GladeCursor should somehow deal with such
	     * concurrencies I suppose).
	     */
	    (gparent->parent && 
	     GLADE_IS_FIXED (gparent->parent)) == FALSE) 
                glade_cursor_set (event->window, GLADE_CURSOR_SELECTOR);
	else if (pointer_mode == GLADE_POINTER_ADD_WIDGET)
                glade_cursor_set (event->window, GLADE_CURSOR_ADD_WIDGET);

	return FALSE;
}

static gboolean
glade_placeholder_button_press (GtkWidget *widget, GdkEventButton *event)
{
	GladePlaceholder   *placeholder;
	GladeProject       *project;
	GladeWidgetAdaptor *adaptor;
	GladePalette       *palette;
	gboolean            handled = FALSE;

	g_return_val_if_fail (GLADE_IS_PLACEHOLDER (widget), FALSE);

	adaptor = glade_palette_get_current_item (glade_app_get_palette ());

	palette = glade_app_get_palette ();
	placeholder = GLADE_PLACEHOLDER (widget);
	project = glade_placeholder_get_project (placeholder);

	if (!GTK_WIDGET_HAS_FOCUS (widget))
		gtk_widget_grab_focus (widget);

	if (event->button == 1 && event->type == GDK_BUTTON_PRESS)
	{
		if (adaptor != NULL)
		{
			/* A widget type is selected in the palette.
			 * Add a new widget of that type.
			 */
			glade_command_create
				(adaptor, 
				 glade_placeholder_get_parent (placeholder),
				 placeholder, project);

			glade_palette_deselect_current_item (glade_app_get_palette(), TRUE);

			/* reset the cursor */
			glade_cursor_set (event->window, GLADE_CURSOR_SELECTOR);

			handled = TRUE;
		}
	}
	else if (event->button == 3 && event->type == GDK_BUTTON_PRESS)
	{
		glade_popup_placeholder_pop (placeholder, event);
		handled = TRUE;
	}

	return handled;
}

static gboolean
glade_placeholder_popup_menu (GtkWidget *widget)
{
	g_return_val_if_fail (GLADE_IS_PLACEHOLDER (widget), FALSE);

	glade_popup_placeholder_pop (GLADE_PLACEHOLDER (widget), NULL);

	return TRUE;
}

GladeWidget *
glade_placeholder_get_parent (GladePlaceholder *placeholder)
{
	GtkWidget   *widget;
	GladeWidget *parent = NULL;

	g_return_val_if_fail (GLADE_IS_PLACEHOLDER (placeholder), NULL);

	for (widget  = gtk_widget_get_parent (GTK_WIDGET (placeholder));
	     widget != NULL;
	     widget = gtk_widget_get_parent (widget))
	{
		if ((parent = glade_widget_get_from_gobject (widget)) != NULL)
			break;
	}
	return parent;
}