summaryrefslogtreecommitdiffstats
path: root/apps/gui/bitmap/list.c
blob: 4ab493d16964065c8a573072bbb88d829be341d0 (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
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2007 by Jonathan Gordon
 *
 * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

/* This file contains the code to draw the list widget on BITMAP LCDs. */

#include "config.h"
#include "lcd.h"
#include "font.h"
#include "button.h"
#include "sprintf.h"
#include "string.h"
#include "settings.h"
#include "kernel.h"
#include "system.h"

#include "action.h"
#include "screen_access.h"
#include "list.h"
#include "scrollbar.h"
#include "lang.h"
#include "sound.h"
#include "misc.h"
#include "talk.h"
#include "viewport.h"

#define SCROLLBAR_WIDTH 6
#define ICON_PADDING 1

/* these are static to make scrolling work */
static struct viewport list_text[NB_SCREENS], title_text[NB_SCREENS];

int gui_list_get_item_offset(struct gui_synclist * gui_list, int item_width,
                             int text_pos, struct screen * display,
                             struct viewport *vp);
bool list_display_title(struct gui_synclist *list, enum screen_type screen);

/* Draw the list...
    internal screen layout:
        -----------------
        |TI|  title     |   TI is title icon
        -----------------
        | | |            |
        |S|I|            |   S - scrollbar
        | | | items      |   I - icons
        | | |            |
        ------------------
*/
static bool draw_title(struct screen *display, struct gui_synclist *list)
{
    const int screen = display->screen_type;
    int style = STYLE_DEFAULT;
    if (!list_display_title(list, screen))
        return false;
    title_text[screen] = *(list->parent[screen]);
    title_text[screen].height = font_get(title_text[screen].font)->height;

    if (list->title_icon != Icon_NOICON && global_settings.show_icons)
    {
        struct viewport title_icon = title_text[screen];
        title_icon.width = get_icon_width(screen)
                          + ICON_PADDING*2;
        title_icon.x += ICON_PADDING;

        title_text[screen].width -= title_icon.width;
        title_text[screen].x += title_icon.width;

        display->set_viewport(&title_icon);
        screen_put_icon(display, 0, 0, list->title_icon);
    }
#ifdef HAVE_LCD_COLOR
    if (list->title_color >= 0)
    {
        style |= (STYLE_COLORED|list->title_color);
    }
#endif
    display->set_viewport(&title_text[screen]);
    display->puts_scroll_style(0, 0, list->title, style);
    return true;
}
    
void list_draw(struct screen *display, struct gui_synclist *list)
{
    struct viewport list_icons;
    int start, end, line_height, style, i;
    const int screen = display->screen_type;
    const int icon_width = get_icon_width(screen) + ICON_PADDING;
    const bool show_cursor = !global_settings.cursor_style &&
                        list->show_selection_marker;
    struct viewport *parent = (list->parent[screen]);
#ifdef HAVE_LCD_COLOR
    unsigned char cur_line = 0;
#endif
    int item_offset;
    bool show_title;
    line_height = font_get(parent->font)->height;
    display->set_viewport(parent);
    display->clear_viewport();
    display->stop_scroll();
    list_text[screen] = *parent;
    if ((show_title = draw_title(display, list)))
    {
        list_text[screen].y += line_height;
        list_text[screen].height -= line_height;
    }

    start = list->start_item[screen];
    end = start + viewport_get_nb_lines(&list_text[screen]);
    
    /* draw the scrollbar if its needed */
    if (global_settings.scrollbar &&
        viewport_get_nb_lines(&list_text[screen]) < list->nb_items)
    {
        struct viewport vp;
        vp = list_text[screen];
        vp.width = SCROLLBAR_WIDTH;
        list_text[screen].width -= SCROLLBAR_WIDTH;
        list_text[screen].x += SCROLLBAR_WIDTH;
        vp.height = line_height *
                    viewport_get_nb_lines(&list_text[screen]);
        vp.x = parent->x;
        display->set_viewport(&vp);
        gui_scrollbar_draw(display, 0, 0, SCROLLBAR_WIDTH-1,
                           vp.height, list->nb_items,
                           list->start_item[screen],
                           list->start_item[screen] + end-start,
                           VERTICAL);
    }
    else if (show_title)
    {
        /* shift everything right a bit... */
        list_text[screen].width -= SCROLLBAR_WIDTH;
        list_text[screen].x += SCROLLBAR_WIDTH;
    }
    
    /* setup icon placement */
    list_icons = list_text[screen];
    int icon_count = global_settings.show_icons && 
            (list->callback_get_item_icon != NULL) ? 1 : 0;
    if (show_cursor)
        icon_count++;
    if (icon_count)
    {
        list_icons.width = icon_width * icon_count;
        list_text[screen].width -= 
                list_icons.width + ICON_PADDING;
        list_text[screen].x += 
                list_icons.width + ICON_PADDING;
    }
    
    for (i=start; i<end && i<list->nb_items; i++)
    {
        /* do the text */
        unsigned char *s;
        char entry_buffer[MAX_PATH];
        unsigned char *entry_name;
        int text_pos = 0;
        s = list->callback_get_item_name(i, list->data, entry_buffer,
                                         sizeof(entry_buffer));
        entry_name = P2STR(s);
        display->set_viewport(&list_text[screen]);
        style = STYLE_DEFAULT;
        /* position the string at the correct offset place */
        int item_width,h;
        display->getstringsize(entry_name, &item_width, &h);
        item_offset = gui_list_get_item_offset(list, item_width,
                                               text_pos, display, 
                                               &list_text[screen]);

#ifdef HAVE_LCD_COLOR
        /* if the list has a color callback */
        if (list->callback_get_item_color)
        {
            int color = list->callback_get_item_color(i, list->data);
            /* if color selected */
            if (color >= 0)
            {
                style |= STYLE_COLORED|color;
            }
        }
#endif
        if(i >= list->selected_item && i <  list->selected_item
                + list->selected_size && list->show_selection_marker)
        {/* The selected item must be displayed scrolling */
            if (global_settings.cursor_style == 1
#ifdef HAVE_REMOTE_LCD
                    /* the global_settings.cursor_style check is here to make 
                    * sure if they want the cursor instead of bar it will work
                    */
                    || (display->depth < 16 && global_settings.cursor_style)
#endif
            )
            {
                /* Display inverted-line-style */
                style = STYLE_INVERT;
            }
#ifdef HAVE_LCD_COLOR
            else if (global_settings.cursor_style == 2)
            {
                /* Display colour line selector */
                style = STYLE_COLORBAR;
            }
            else if (global_settings.cursor_style == 3)
            {
                /* Display gradient line selector */
                style = STYLE_GRADIENT;

                /* Make the lcd driver know how many lines the gradient should
                   cover and current line number */
                /* number of selected lines */
                style |= NUMLN_PACK(list->selected_size);
                /* current line number, zero based */
                style |= CURLN_PACK(cur_line);
                cur_line++;
            }
#endif
            /* if the text is smaller than the viewport size */
            if (item_offset> item_width
                            - (list_text[screen].width - text_pos))
            {
                /* don't scroll */
                display->puts_style_offset(0, i-start, entry_name,
                        style, item_offset);
            }
            else
            {
                display->puts_scroll_style_offset(0, i-start, entry_name,
                        style, item_offset);
            }
        }
        else
        {
            if (list->scroll_all)
                display->puts_scroll_style_offset(0, i-start, entry_name,
                        style, item_offset);
            else
                display->puts_style_offset(0, i-start, entry_name,
                        style, item_offset);
        }
        /* do the icon */
        if (list->callback_get_item_icon && global_settings.show_icons)
        {
            display->set_viewport(&list_icons);
            screen_put_icon_with_offset(display, show_cursor?1:0,
                                    (i-start),show_cursor?ICON_PADDING:0,0,
                                    list->callback_get_item_icon(i, list->data));
            if (show_cursor && i >= list->selected_item &&
                i <  list->selected_item + list->selected_size)
            {
                screen_put_icon(display, 0, i-start, Icon_Cursor);
            }
        }
        else if (show_cursor && i >= list->selected_item &&
                i <  list->selected_item + list->selected_size)
        {
            display->set_viewport(&list_icons);
            screen_put_icon(display, 0, (i-start), Icon_Cursor);
        }
    }
    display->set_viewport(parent);
    display->update_viewport();
    display->set_viewport(NULL);
}

#if defined(HAVE_TOUCHSCREEN)
/* This needs to be fixed if we ever get more than 1 touchscreen on a target.
 * This also assumes the whole screen is used, which is a bad assumption but
 * fine until customizable lists comes in...
 */
static bool scrolling=false;

unsigned gui_synclist_do_touchscreen(struct gui_synclist * gui_list)
{
    short x, y;
    int button = action_get_touchscreen_press(&x, &y);
    int line;
    struct screen *display = &screens[SCREEN_MAIN];
    int screen = display->screen_type;
    if (button == BUTTON_NONE)
        return ACTION_NONE;
    if (x<list_text[screen].x)
    {
        /* Top left corner is GO_TO_ROOT */
        if (y<list_text[SCREEN_MAIN].y)
        {
            if (button == BUTTON_REL)
                return ACTION_STD_MENU;
            else if (button == (BUTTON_REPEAT|BUTTON_REL))
                return ACTION_STD_CONTEXT;
            else
                return ACTION_NONE;
        }
        /* Scroll bar */
        else
        {
            int nb_lines = viewport_get_nb_lines(&list_text[screen]);
            if (nb_lines <  gui_list->nb_items)
            {
                int scrollbar_size = nb_lines*
                    font_get(gui_list->parent[screen]->font)->height;
                int actual_y = y - list_text[screen].y;
                
                int new_selection = (actual_y * gui_list->nb_items)
                        / scrollbar_size;
                
                int start_item = new_selection - nb_lines/2;
                if(start_item < 0)
                    start_item = 0;
                else if(start_item > gui_list->nb_items - nb_lines)
                    start_item = gui_list->nb_items - nb_lines;
                    
                gui_list->start_item[screen] = start_item;
                gui_synclist_select_item(gui_list, new_selection);
                
                return ACTION_REDRAW;
            }
        }
    }
    else
    {
        /* |--------------------------------------------------------|
         * | Description of the touchscreen list interface:         |
         * |--------------------------------------------------------|
         * | Pressing an item will select it and "enter" it.        |
         * |                                                        |
         * | Pressing and holding your pen down will scroll through |
         * | the list of items.                                     |
         * |                                                        |
         * | Pressing and holding your pen down on a single item    |
         * | will bring up the context menu of it.                  |
         * |--------------------------------------------------------|
         */
        if (y > list_text[screen].y || button & BUTTON_REPEAT)
        {
            int line_height, actual_y;
            
            actual_y = y - list_text[screen].y;
            line_height = font_get(gui_list->parent[screen]->font)->height;
            line = actual_y / line_height;
            
            /* Pressed below the list*/
            if (gui_list->start_item[screen]+line >= gui_list->nb_items)
                return ACTION_NONE;
            
            /* Pressed a border */
            if(UNLIKELY(actual_y % line_height == 0))
                return ACTION_NONE;
            
            if (line != (gui_list->selected_item - gui_list->start_item[screen])
                && button ^ BUTTON_REL)
            {
                if(button & BUTTON_REPEAT)
                    scrolling = true;
                
                gui_synclist_select_item(gui_list, gui_list->start_item[screen]
                                                   + line);
                
                return ACTION_REDRAW;
            }
            
            if (button == (BUTTON_REPEAT|BUTTON_REL))
            {
                if(!scrolling)
                {
                    /* Pen was hold on the same line as the 
                     * previously selected one
                     * => simulate long button press
                     */
                    return ACTION_STD_CONTEXT;
                }
                else
                {
                    /* Pen was moved across several lines and then released on 
                     * this one
                     * => do nothing
                     */
                    scrolling = false;
                    return ACTION_NONE;
                }
            }
            else if(button == BUTTON_REL &&
                    line == gui_list->selected_item - gui_list->start_item[screen])
            {
                /* Pen was released on either the same line as the previously
                 *  selected one or an other one
                 *  => simulate short press
                 */
                return ACTION_STD_OK;
            }
            else
                return ACTION_NONE;
        }
        /* Everything above the items is cancel */
        else if (y < list_text[screen].y && button == BUTTON_REL)
            return ACTION_STD_CANCEL;
    }
    return ACTION_NONE;
}
#endif