source: mainline/uspace/lib/ui/src/pbutton.c@ faca61b8

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since faca61b8 was faca61b8, checked in by Jiri Svoboda <jiri@…>, 5 years ago

Push button needs to handle position events itself

Also, release event should release the button regardless if it is
positioned inside or outside.
  • Property mode set to 100644
File size: 9.6 KB
Line 
1/*
2 * Copyright (c) 2020 Jiri Svoboda
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup libui
30 * @{
31 */
32/**
33 * @file Push button
34 */
35
36#include <errno.h>
37#include <gfx/color.h>
38#include <gfx/context.h>
39#include <gfx/render.h>
40#include <gfx/text.h>
41#include <io/pos_event.h>
42#include <stdlib.h>
43#include <str.h>
44#include <ui/pbutton.h>
45#include "../private/pbutton.h"
46#include "../private/resource.h"
47
48/** Caption movement when button is pressed down */
49enum {
50 ui_pb_press_dx = 1,
51 ui_pb_press_dy = 1
52};
53
54/** Create new push button.
55 *
56 * @param resource UI resource
57 * @param caption Caption
58 * @param rpbutton Place to store pointer to new push button
59 * @return EOK on success, ENOMEM if out of memory
60 */
61errno_t ui_pbutton_create(ui_resource_t *resource, const char *caption,
62 ui_pbutton_t **rpbutton)
63{
64 ui_pbutton_t *pbutton;
65
66 pbutton = calloc(1, sizeof(ui_pbutton_t));
67 if (pbutton == NULL)
68 return ENOMEM;
69
70 pbutton->caption = str_dup(caption);
71 if (pbutton->caption == NULL) {
72 free(pbutton);
73 return ENOMEM;
74 }
75
76 pbutton->res = resource;
77 *rpbutton = pbutton;
78 return EOK;
79}
80
81/** Destroy push button.
82 *
83 * @param pbutton Push button or @c NULL
84 */
85void ui_pbutton_destroy(ui_pbutton_t *pbutton)
86{
87 if (pbutton == NULL)
88 return;
89
90 free(pbutton);
91}
92
93/** Set button rectangle.
94 *
95 * @param pbutton Button
96 * @param rect New button rectanle
97 */
98void ui_pbutton_set_rect(ui_pbutton_t *pbutton, gfx_rect_t *rect)
99{
100 pbutton->rect = *rect;
101}
102
103/** Set default flag.
104 *
105 * Default button is the one activated by Enter key, it is marked
106 * by thicker frame.
107 *
108 * @param pbutton Button
109 * @param isdefault @c true iff button is default
110 */
111void ui_pbutton_set_default(ui_pbutton_t *pbutton, bool isdefault)
112{
113 pbutton->isdefault = isdefault;
114}
115
116/** Paint outer button frame.
117 *
118 * @param pbutton Push button
119 * @return EOK on success or an error code
120 */
121static errno_t ui_pbutton_paint_frame(ui_pbutton_t *pbutton)
122{
123 gfx_color_t *color = NULL;
124 gfx_rect_t rect;
125 gfx_coord_t thickness;
126 errno_t rc;
127
128 thickness = pbutton->isdefault ? 2 : 1;
129
130 rc = gfx_color_new_rgb_i16(0, 0, 0, &color);
131 if (rc != EOK)
132 goto error;
133
134 rc = gfx_set_color(pbutton->res->gc, color);
135 if (rc != EOK)
136 goto error;
137
138 rect.p0.x = pbutton->rect.p0.x + 1;
139 rect.p0.y = pbutton->rect.p0.y;
140 rect.p1.x = pbutton->rect.p1.x - 1;
141 rect.p1.y = pbutton->rect.p0.y + thickness;
142 rc = gfx_fill_rect(pbutton->res->gc, &rect);
143 if (rc != EOK)
144 goto error;
145
146 rect.p0.x = pbutton->rect.p0.x + 1;
147 rect.p0.y = pbutton->rect.p1.y - thickness;
148 rect.p1.x = pbutton->rect.p1.x - 1;
149 rect.p1.y = pbutton->rect.p1.y;
150 rc = gfx_fill_rect(pbutton->res->gc, &rect);
151 if (rc != EOK)
152 goto error;
153
154 rect.p0.x = pbutton->rect.p0.x;
155 rect.p0.y = pbutton->rect.p0.y + 1;
156 rect.p1.x = pbutton->rect.p0.x + thickness;
157 rect.p1.y = pbutton->rect.p1.y - 1;
158 rc = gfx_fill_rect(pbutton->res->gc, &rect);
159 if (rc != EOK)
160 goto error;
161
162 rect.p0.x = pbutton->rect.p1.x - thickness;
163 rect.p0.y = pbutton->rect.p0.y + 1;
164 rect.p1.x = pbutton->rect.p1.x;
165 rect.p1.y = pbutton->rect.p1.y - 1;
166 rc = gfx_fill_rect(pbutton->res->gc, &rect);
167 if (rc != EOK)
168 goto error;
169
170 gfx_color_delete(color);
171 return EOK;
172error:
173 if (color != NULL)
174 gfx_color_delete(color);
175 return rc;
176}
177
178/** Paint outset button bevel.
179 *
180 * @param pbutton Push button
181 * @return EOK on success or an error code
182 */
183static errno_t ui_pbutton_paint_outset(ui_pbutton_t *pbutton,
184 gfx_rect_t *rect)
185{
186 gfx_color_t *color = NULL;
187 gfx_rect_t frect;
188 gfx_coord_t i;
189 errno_t rc;
190
191 /* Highlight */
192
193 rc = gfx_color_new_rgb_i16(0xffff, 0xffff, 0xffff, &color);
194 if (rc != EOK)
195 goto error;
196
197 rc = gfx_set_color(pbutton->res->gc, color);
198 if (rc != EOK)
199 goto error;
200
201 for (i = 0; i < 2; i++) {
202 frect.p0.x = rect->p0.x + i;
203 frect.p0.y = rect->p0.y + i;
204 frect.p1.x = rect->p1.x - i - 1;
205 frect.p1.y = rect->p0.y + i + 1;
206 rc = gfx_fill_rect(pbutton->res->gc, &frect);
207 if (rc != EOK)
208 goto error;
209
210 frect.p0.x = rect->p0.x + i;
211 frect.p0.y = rect->p0.y + i + 1;
212 frect.p1.x = rect->p0.x + i + 1;
213 frect.p1.y = rect->p1.y - i - 1;
214 rc = gfx_fill_rect(pbutton->res->gc, &frect);
215 if (rc != EOK)
216 goto error;
217 }
218
219 gfx_color_delete(color);
220 color = NULL;
221
222 /* Shadow */
223
224 rc = gfx_color_new_rgb_i16(0x8888, 0x8888, 0x8888, &color);
225 if (rc != EOK)
226 goto error;
227
228 rc = gfx_set_color(pbutton->res->gc, color);
229 if (rc != EOK)
230 goto error;
231
232 for (i = 0; i < 2; i++) {
233 frect.p0.x = rect->p0.x + i;
234 frect.p0.y = rect->p1.y - i - 1;
235 frect.p1.x = rect->p1.x - i - 1;
236 frect.p1.y = rect->p1.y - i;
237 rc = gfx_fill_rect(pbutton->res->gc, &frect);
238 if (rc != EOK)
239 goto error;
240
241 frect.p0.x = rect->p1.x - i - 1;
242 frect.p0.y = rect->p0.y + i;
243 frect.p1.x = rect->p1.x - i;
244 frect.p1.y = rect->p1.y - i;
245 rc = gfx_fill_rect(pbutton->res->gc, &frect);
246 if (rc != EOK)
247 goto error;
248 }
249
250 gfx_color_delete(color);
251
252 return EOK;
253error:
254 if (color != NULL)
255 gfx_color_delete(color);
256 return rc;
257}
258
259/** Paint inset button bevel.
260 *
261 * @param pbutton Push button
262 * @return EOK on success or an error code
263 */
264static errno_t ui_pbutton_paint_inset(ui_pbutton_t *pbutton,
265 gfx_rect_t *rect)
266{
267 gfx_color_t *color = NULL;
268 gfx_rect_t frect;
269 errno_t rc;
270
271 rc = gfx_color_new_rgb_i16(0x8888, 0x8888, 0x8888, &color);
272 if (rc != EOK)
273 goto error;
274
275 rc = gfx_set_color(pbutton->res->gc, color);
276 if (rc != EOK)
277 goto error;
278
279 frect.p0.x = rect->p0.x;
280 frect.p0.y = rect->p0.y;
281 frect.p1.x = rect->p1.x;
282 frect.p1.y = rect->p0.y + 2;
283 rc = gfx_fill_rect(pbutton->res->gc, &frect);
284 if (rc != EOK)
285 goto error;
286
287 frect.p0.x = rect->p0.x;
288 frect.p0.y = rect->p0.y + 2;
289 frect.p1.x = rect->p0.x + 2;
290 frect.p1.y = rect->p1.y;
291 rc = gfx_fill_rect(pbutton->res->gc, &frect);
292 if (rc != EOK)
293 goto error;
294
295 gfx_color_delete(color);
296
297 return EOK;
298error:
299 if (color != NULL)
300 gfx_color_delete(color);
301 return rc;
302}
303
304/** Paint push button.
305 *
306 * @param pbutton Push button
307 * @return EOK on success or an error code
308 */
309errno_t ui_pbutton_paint(ui_pbutton_t *pbutton)
310{
311 gfx_color_t *color = NULL;
312 gfx_coord2_t pos;
313 gfx_text_fmt_t fmt;
314 gfx_rect_t rect;
315 gfx_coord_t thickness;
316 errno_t rc;
317
318 thickness = pbutton->isdefault ? 2 : 1;
319
320 rect.p0.x = pbutton->rect.p0.x + thickness;
321 rect.p0.y = pbutton->rect.p0.y + thickness;
322 rect.p1.x = pbutton->rect.p1.x - thickness;
323 rect.p1.y = pbutton->rect.p1.y - thickness;
324
325 rc = gfx_color_new_rgb_i16(0xc8c8, 0xc8c8, 0xc8c8, &color);
326 if (rc != EOK)
327 goto error;
328
329 rc = gfx_set_color(pbutton->res->gc, color);
330 if (rc != EOK)
331 goto error;
332
333 rc = gfx_fill_rect(pbutton->res->gc, &rect);
334 if (rc != EOK)
335 goto error;
336
337 gfx_color_delete(color);
338 color = NULL;
339
340 rc = gfx_color_new_rgb_i16(0, 0, 0, &color);
341 if (rc != EOK)
342 goto error;
343
344 rc = gfx_set_color(pbutton->res->gc, color);
345 if (rc != EOK)
346 goto error;
347
348 /* Center of button rectangle */
349 pos.x = (rect.p0.x + rect.p1.x) / 2;
350 pos.y = (rect.p0.y + rect.p1.y) / 2;
351
352 if (pbutton->held) {
353 pos.x += ui_pb_press_dx;
354 pos.y += ui_pb_press_dy;
355 }
356
357 gfx_text_fmt_init(&fmt);
358 fmt.halign = gfx_halign_center;
359 fmt.valign = gfx_valign_center;
360
361 rc = gfx_puttext(pbutton->res->font, &pos, &fmt, pbutton->caption);
362 if (rc != EOK)
363 goto error;
364
365 gfx_color_delete(color);
366 color = NULL;
367
368 rc = ui_pbutton_paint_frame(pbutton);
369 if (rc != EOK)
370 goto error;
371
372 if (pbutton->held) {
373 rc = ui_pbutton_paint_inset(pbutton, &rect);
374 if (rc != EOK)
375 goto error;
376 } else {
377 rc = ui_pbutton_paint_outset(pbutton, &rect);
378 if (rc != EOK)
379 goto error;
380 }
381
382 return EOK;
383error:
384 if (color != NULL)
385 gfx_color_delete(color);
386 return rc;
387}
388
389/** Press down button.
390 *
391 * This does not automatically repaint the button.
392 *
393 * @param pbutton Push button
394 */
395void ui_pbutton_press(ui_pbutton_t *pbutton)
396{
397 pbutton->held = true;
398}
399
400/** Release button.
401 *
402 * This does not automatically repaint the button.
403 *
404 * @param pbutton Push button
405 */
406void ui_pbutton_release(ui_pbutton_t *pbutton)
407{
408 pbutton->held = false;
409}
410
411/** Handle push button position event.
412 *
413 * @param pbutton Push button
414 * @param pos_event Position event
415 */
416void ui_pbutton_pos_event(ui_pbutton_t *pbutton, pos_event_t *event)
417{
418 gfx_coord2_t pos;
419
420 pos.x = event->hpos;
421 pos.y = event->vpos;
422
423 if (gfx_pix_inside_rect(&pos, &pbutton->rect)) {
424 if (event->type == POS_PRESS) {
425 ui_pbutton_press(pbutton);
426 (void) ui_pbutton_paint(pbutton);
427 }
428 }
429
430 if (event->type == POS_RELEASE && pbutton->held) {
431 ui_pbutton_release(pbutton);
432 (void) ui_pbutton_paint(pbutton);
433 }
434}
435
436/** @}
437 */
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