aboutsummaryrefslogtreecommitdiffstats
path: root/widgets/table/e-cell-toggle.c
blob: dda87efcae9979533c3abe1c03fade2c913142aa (plain) (blame)
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
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-cell-toggle.c - Multi-state image toggle cell object.
 * Copyright 1999, 2000, Ximian, Inc.
 *
 * Authors:
 *   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 <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <libgnomecanvas/gnome-canvas.h>

#include "a11y/e-table/gal-a11y-e-cell-toggle.h"
#include "a11y/e-table/gal-a11y-e-cell-registry.h"
#include "e-util/e-util.h"
#include "misc/e-hsv-utils.h"

#include "e-cell-toggle.h"
#include "e-table-item.h"

#define PARENT_TYPE e_cell_get_type ()

typedef struct {
    ECellView     cell_view;
    GdkGC        *gc;
    GnomeCanvas  *canvas;
    GdkPixmap   **pixmap_cache;
} ECellToggleView;

static ECellClass *parent_class;

#define CACHE_SEQ_COUNT 6

/*
 * ECell::realize method
 */
static ECellView *
etog_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
{
    ECellToggleView *toggle_view = g_new0 (ECellToggleView, 1);
    ETableItem *eti = E_TABLE_ITEM (e_table_item_view);
    GnomeCanvas *canvas = GNOME_CANVAS_ITEM (eti)->canvas;
    ECellToggle *etog = E_CELL_TOGGLE (ecell);
    int i;

    toggle_view->cell_view.ecell = ecell;
    toggle_view->cell_view.e_table_model = table_model;
    toggle_view->cell_view.e_table_item_view = e_table_item_view;
    toggle_view->canvas = canvas;
    toggle_view->pixmap_cache = g_new (GdkPixmap *, etog->n_states * CACHE_SEQ_COUNT);
    for (i = 0; i < etog->n_states * CACHE_SEQ_COUNT; i++)
        toggle_view->pixmap_cache[i] = NULL;

    return (ECellView *) toggle_view;
}

static void
etog_kill_view (ECellView *ecell_view)
{
    ECellToggle *etog = E_CELL_TOGGLE (ecell_view->ecell);
    ECellToggleView *toggle_view = (ECellToggleView *) ecell_view;
    int i;

    for (i = 0; i < etog->n_states * CACHE_SEQ_COUNT; i++)
        if (toggle_view->pixmap_cache[i])
            g_object_unref (toggle_view->pixmap_cache[i]);
    g_free (toggle_view->pixmap_cache);
    g_free (ecell_view);
}   

static void
etog_realize (ECellView *ecell_view)
{
    ECellToggleView *toggle_view = (ECellToggleView *) ecell_view;

    toggle_view->gc = gdk_gc_new (GTK_WIDGET (toggle_view->canvas)->window);
}

/*
 * ECell::unrealize method
 */
static void
etog_unrealize (ECellView *ecv)
{
    ECellToggleView *toggle_view = (ECellToggleView *) ecv;

    g_object_unref (toggle_view->gc);
    toggle_view->gc = NULL;
}

#define PIXMAP_CACHE(toggle_view, cache_seq, image_seq) ((toggle_view)->pixmap_cache[(cache_seq) * E_CELL_TOGGLE (((ECellView *) (toggle_view))->ecell)->n_states + (image_seq)])

#define RGB_COLOR(color) (((color).red & 0xff00) << 8 | \
               ((color).green & 0xff00) | \
               ((color).blue & 0xff00) >> 8)

static void
check_cache (ECellToggleView *toggle_view, int image_seq, int cache_seq)
{
    ECellView *ecell_view = (ECellView *) toggle_view;
    ECellToggle *etog = E_CELL_TOGGLE (ecell_view->ecell);

    if (PIXMAP_CACHE (toggle_view, cache_seq, image_seq) == NULL) {
        GdkPixbuf *image = etog->images[image_seq];
        GdkPixbuf *flat;
        GdkColor  color;
        int width = gdk_pixbuf_get_width (image);
        int height = gdk_pixbuf_get_height (image);

        PIXMAP_CACHE (toggle_view, cache_seq, image_seq) =
            gdk_pixmap_new (toggle_view->canvas->layout.bin_window, width, height,
                    gtk_widget_get_visual (GTK_WIDGET (toggle_view->canvas))->depth);

            
        switch (cache_seq % 3) {
        case 0:
            color = GTK_WIDGET (toggle_view->canvas)->style->bg [GTK_STATE_SELECTED];
            break;
        case 1:
            color = GTK_WIDGET (toggle_view->canvas)->style->bg [GTK_STATE_ACTIVE];
            break;
        case 2:
            color = GTK_WIDGET (toggle_view->canvas)->style->base [GTK_STATE_NORMAL];
            break;
        }

        if (cache_seq >= 3) {
            e_hsv_tweak (&color, 0.0f, 0.0f, -0.07f);
        }

        flat = gdk_pixbuf_composite_color_simple (image,
                              width, height,
                              GDK_INTERP_BILINEAR,
                              255,
                              1,
                              RGB_COLOR (color), RGB_COLOR (color));

        gdk_draw_pixbuf (PIXMAP_CACHE (toggle_view, cache_seq, image_seq),
                 toggle_view->gc,
                 flat,
                 0, 0,
                 0, 0,
                 width, height,
                 GDK_RGB_DITHER_NORMAL,
                 0, 0);
        g_object_unref (flat);
    }
}

/*
 * ECell::draw method
 */
static void
etog_draw (ECellView *ecell_view, GdkDrawable *drawable,
      int model_col, int view_col, int row, ECellFlags flags,
      int x1, int y1, int x2, int y2)
{
    ECellToggle *toggle = E_CELL_TOGGLE (ecell_view->ecell);
    ECellToggleView *toggle_view = (ECellToggleView *) ecell_view;
    GdkPixmap *pixmap;
    GdkPixbuf *image;
    int x, y, width, height;
    int cache_seq;

    const int value = GPOINTER_TO_INT (
         e_table_model_value_at (ecell_view->e_table_model, model_col, row));
    
    if (value < 0 || value >= toggle->n_states){
        g_warning ("Value from the table model is %d, the states we support are [0..%d)\n",
               value, toggle->n_states);
        return;
    }

    if (flags & E_CELL_SELECTED) {
        if (GTK_WIDGET_HAS_FOCUS (toggle_view->canvas))
            cache_seq = 0;
        else
            cache_seq = 1;
    } else
        cache_seq = 2;

    if (E_TABLE_ITEM (ecell_view->e_table_item_view)->alternating_row_colors && (row % 2) == 0)
        cache_seq += 3;

    check_cache (toggle_view, value, cache_seq);

    pixmap = PIXMAP_CACHE (toggle_view, cache_seq, value);
    image = toggle->images[value];

    if ((x2 - x1) < gdk_pixbuf_get_width (image)){
        x = x1;
        width = x2 - x1;
    } else {
        x = x1 + ((x2 - x1) - gdk_pixbuf_get_width (image)) / 2;
        width = gdk_pixbuf_get_width (image);
    }

    if ((y2 - y1) < gdk_pixbuf_get_height (image)){
        y = y1;
        height = y2 - y1;
    } else {
        y = y1 + ((y2 - y1) - gdk_pixbuf_get_height (image)) / 2;
        height = gdk_pixbuf_get_height (image);
    }

    gdk_draw_drawable (drawable, toggle_view->gc,
              pixmap,
              0, 0,
              x, y,
              width, height);
}

static void
etog_set_value (ECellToggleView *toggle_view, int model_col, int view_col, int row, int value)
{
    ECell *ecell = toggle_view->cell_view.ecell;
    ECellToggle *toggle = E_CELL_TOGGLE (ecell);

    if (value >= toggle->n_states)
        value = 0;

    e_table_model_set_value_at (toggle_view->cell_view.e_table_model,
                    model_col, row, GINT_TO_POINTER (value));
}

/*
 * ECell::event method
 */
static gint
etog_event (ECellView *ecell_view, GdkEvent *event, int model_col, int view_col, int row, ECellFlags flags, ECellActions *actions)
{
    ECellToggleView *toggle_view = (ECellToggleView *) 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;
            
        etog_set_value (toggle_view, model_col, view_col, row, value + 1);
        return TRUE;

    default:
        return FALSE;
    }
}

/*
 * ECell::height method
 */
static int
etog_height (ECellView *ecell_view, int model_col, int view_col, int row)
{
    ECellToggle *toggle = E_CELL_TOGGLE (ecell_view->ecell);

    return toggle->height;
}

/*
 * ECell::print method
 */
static void
etog_print (ECellView *ecell_view, GtkPrintContext *context, 
        int model_col, int view_col, int row,
        double width, double height)
{
    ECellToggle *toggle = E_CELL_TOGGLE(ecell_view->ecell);
    GdkPixbuf *image;
    double image_width, image_height;
    const int value = GPOINTER_TO_INT (
        e_table_model_value_at (ecell_view->e_table_model, model_col, row));

    cairo_t *cr;    
        if (value >= toggle->n_states){
        g_warning ("Value from the table model is %d, the states we support are [0..%d)\n",
               value, toggle->n_states);
        return;
    }

    cr = gtk_print_context_get_cairo_context (context);
    cairo_save(cr);
        image = toggle->images[value];
    cairo_translate (cr, 0 , 0);    
    image = gdk_pixbuf_add_alpha (image, TRUE, 255, 255, 255);
        image_width = (double)gdk_pixbuf_get_width (image);
    image_height = (double)gdk_pixbuf_get_height (image);
    cairo_rectangle (cr, image_width / 7, image_height / 3, 
                 image_width - image_width / 4, 
                 image_width - image_height / 7); 
    cairo_clip (cr);
    gdk_cairo_set_source_pixbuf (cr, image, 0, image_height / 4);
    cairo_paint (cr);
    cairo_restore(cr);
}

static gdouble
etog_print_height (ECellView *ecell_view, GtkPrintContext *context, 
           int model_col, int view_col, int row,
           double width)
{
    ECellToggle *toggle = E_CELL_TOGGLE (ecell_view->ecell);

    return toggle->height;
}

/*
 * ECell::max_width method
 */
static int
etog_max_width (ECellView *ecell_view, int model_col, int view_col)
{
    ECellToggle *toggle = E_CELL_TOGGLE (ecell_view->ecell);
    int max_width = 0;
    int number_of_rows;
    int row;

    number_of_rows = e_table_model_row_count (ecell_view->e_table_model);
    for (row = 0; row < number_of_rows; row++) {
        void *value = e_table_model_value_at (ecell_view->e_table_model,
                              model_col, row);
        max_width = MAX (max_width, gdk_pixbuf_get_width (toggle->images[GPOINTER_TO_INT (value)]));
    }

    return max_width;
}

static void
etog_style_set (ECellView *ecell_view, GtkStyle *previous_style)
{
    ECellToggle *toggle = E_CELL_TOGGLE (ecell_view->ecell);
    ECellToggleView *toggle_view = (ECellToggleView *) ecell_view;
    int i;

    for (i = 0; i < toggle->n_states * CACHE_SEQ_COUNT; i++) {
        if (toggle_view->pixmap_cache[i]) {
            g_object_unref (toggle_view->pixmap_cache[i]);
            toggle_view->pixmap_cache[i] = NULL;
        }
    }
}

static void
etog_finalize (GObject *object)
{
    ECellToggle *etog = E_CELL_TOGGLE (object);
    int i;
    
    for (i = 0; i < etog->n_states; i++)
        g_object_unref (etog->images [i]);

    g_free (etog->images);

    etog->images = NULL;
    etog->n_states = 0;

    G_OBJECT_CLASS (parent_class)->finalize (object);
}

static void
e_cell_toggle_class_init (GtkObjectClass *object_class)
{
    ECellClass *ecc = (ECellClass *) object_class;

    G_OBJECT_CLASS (object_class)->finalize = etog_finalize;

    ecc->new_view   = etog_new_view;
    ecc->kill_view  = etog_kill_view;
    ecc->realize    = etog_realize;
    ecc->unrealize  = etog_unrealize;
    ecc->draw       = etog_draw;
    ecc->event      = etog_event;
    ecc->height     = etog_height;
    ecc->print      = etog_print;
    ecc->print_height = etog_print_height;
    ecc->max_width  = etog_max_width;
    ecc->style_set  = etog_style_set;

    parent_class = g_type_class_ref (PARENT_TYPE);
    gal_a11y_e_cell_registry_add_cell_type (NULL,
                             E_CELL_TOGGLE_TYPE,
                                                gal_a11y_e_cell_toggle_new);
}

static void
e_cell_toggle_init (GtkObject *object)
{
    ECellToggle *etog = (ECellToggle *) object;

    etog->images = NULL;
    etog->n_states = 0;
}

E_MAKE_TYPE(e_cell_toggle, "ECellToggle", ECellToggle, e_cell_toggle_class_init, e_cell_toggle_init, PARENT_TYPE)

/**
 * e_cell_toggle_construct:
 * @etog: a fresh ECellToggle object
 * @border: number of pixels used as a border
 * @n_states: number of states the toggle will have
 * @images: a collection of @n_states images, one for each state.
 *
 * Constructs the @etog object with the @border, @n_staes, and @images
 * arguments.
 */
void
e_cell_toggle_construct (ECellToggle *etog, int border, int n_states, GdkPixbuf **images)
{
    int max_height =  0;
    int i;
    
    etog->border = border;
    etog->n_states = n_states;

    etog->images = g_new (GdkPixbuf *, n_states);

    for (i = 0; i < n_states; i++){
        etog->images [i] = images [i];
        g_object_ref (images [i]);

        if (gdk_pixbuf_get_height (images [i]) > max_height)
            max_height = gdk_pixbuf_get_height (images [i]);
    }

    etog->height = max_height;
}

/**
 * e_cell_checkbox_new:
 * @border: number of pixels used as a border
 * @n_states: number of states the toggle will have
 * @images: a collection of @n_states images, one for each state.
 *
 * Creates a new ECell renderer that can be used to render toggle
 * buttons with the images specified in @images.  The value returned 
 * by ETableModel::get_value is typecase into an integer and clamped
 * to the [0..n_states) range.  That will select the image rendered.
 * 
 * Returns: an ECell object that can be used to render multi-state
 * toggle cells.
 */
ECell *
e_cell_toggle_new (int border, int n_states, GdkPixbuf **images)
{
    ECellToggle *etog = g_object_new (E_CELL_TOGGLE_TYPE, NULL);

    e_cell_toggle_construct (etog, border, n_states, images);

    return (ECell *) etog;
}