summaryrefslogtreecommitdiff
path: root/src/gui/focushandler.h
blob: 346abc7b8fcb08f2686f0e0d67ad87c7a7becbc5 (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
/*
 *  The ManaPlus Client
 *  Copyright (C) 2004-2009  The Mana World Development Team
 *  Copyright (C) 2009-2010  The Mana Developers
 *  Copyright (C) 2011-2017  The ManaPlus Developers
 *
 *  This file is part of The ManaPlus Client.
 *
 *  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
 *  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, see <http://www.gnu.org/licenses/>.
 */

/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
 *
 *
 * Per Larsson a.k.a finalman
 * Olof Naessén a.k.a jansem/yakslem
 *
 * Visit: http://guichan.sourceforge.net
 *
 * License: (BSD)
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of Guichan nor the names of its contributors may
 *    be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef GUI_FOCUSHANDLER_H
#define GUI_FOCUSHANDLER_H

#include "utils/vector.h"

#include <list>

#include "localconsts.h"

class Event;
class Widget;

/**
 * The focus handler. This focus handler does exactly the same as the Guichan
 * focus handler, but keeps a stack of modal widgets to be able to handle
 * multiple modal focus requests.
 */
class FocusHandler final
{
    public:
        FocusHandler();

        A_DELETE_COPY(FocusHandler)

        /**
          * Requests focus for a widget. Focus will only be granted to a widget
          * if it's focusable and if no other widget has modal focus.
          * If a widget receives focus a focus event will be sent to the
          * focus listeners of the widget.
          *
          * @param widget The widget to request focus for.
          * @see isFocused, Widget::requestFocus
          */
        void requestFocus(const Widget *const widget);

        /**
          * Requests modal focus for a widget. Focus will only be granted
          * to a widget if it's focusable and if no other widget has modal
          * focus.
          *
          * @param widget The widget to request modal focus for.
          * @throws Exception when another widget already has modal focus.
          * @see releaseModalFocus, Widget::requestModalFocus
          */
        void requestModalFocus(Widget *const widget);

        /**
          * Requests modal mouse input focus for a widget. Focus will only
          * be granted to a widget if it's focusable and if no other widget
          * has modal mouse input focus.
          *
          * Modal mouse input focus means no other widget then the widget with
          * modal mouse input focus will receive mouse input. The widget with
          * modal mouse input focus will also receive mouse input no matter what
          * the mouse input is or where the mouse input occurs.
          *
          * @param widget The widget to focus for modal mouse input focus.
          * @throws Exception when another widget already has modal mouse input
          *         focus.
          * @see releaseModalMouseInputFocus, Widget::requestModalMouseInputFocus
          */
        void requestModalMouseInputFocus(Widget *const widget);

        /**
          * Releases modal focus if the widget has modal focus.
          * If the widget doesn't have modal focus no relase will occur.
          *
          * @param widget The widget to release modal focus for.
          * @see reuqestModalFocus, Widget::releaseModalFocus
          */
        void releaseModalFocus(Widget *const widget);

        /**
          * Releases modal mouse input focus if the widget has modal mouse input
          * focus. If the widget doesn't have modal mouse input focus no relase
          * will occur.
          *
          * @param widget the widget to release modal mouse input focus for.
          * @see requestModalMouseInputFocus, Widget::releaseModalMouseInputFocus
          */
        void releaseModalMouseInputFocus(const Widget *const widget);

        /**
          * Checks if a widget is focused.
          *
          * @param widget The widget to check.
          * @return True if the widget is focused, false otherwise.
          * @see Widget::isFocused
          */
        bool isFocused(const Widget *const widget) const;

        /**
          * Gets the widget with focus.
          *
          * @return The widget with focus. NULL if no widget has focus.
          */
        Widget* getFocused() const A_WARN_UNUSED;

        /**
          * Gets the widget with modal focus.
          *
          * @return The widget with modal focus. NULL if no widget has
          *         modal focus.
          */
        Widget* getModalFocused() const A_WARN_UNUSED;

        /**
          * Gets the widget with modal mouse input focus.
          *
          * @return The widget with modal mouse input focus. NULL if
          *         no widget has modal mouse input focus.
          */
        Widget* getModalMouseInputFocused() const A_WARN_UNUSED;

        /**
          * Focuses the next widget added to a conainer.
          * If no widget has focus the first widget gets focus. The order
          * in which the widgets are focused is determined by the order
          * they were added to a container.
          *
          * @see focusPrevious
          */
        void focusNext();

        /**
          * Focuses the previous widget added to a contaienr.
          * If no widget has focus the first widget gets focus. The order
          * in which the widgets are focused is determined by the order
          * they were added to a container.
          *
          * @see focusNext
          */
        void focusPrevious();

        /**
          * Adds a widget to by handles by the focus handler.
          *
          * @param widget The widget to add.
          * @see remove
          */
        void add(Widget *const widget);

        /**
          * Removes a widget from the focus handler.
          *
          * @param widget The widget to remove.
          * @see add
          */
        void remove(Widget *const widget);

        /**
          * Focuses nothing. A focus event will also be sent to the
          * focused widget's focus listeners if a widget has focus.
          */
        void focusNone();

        /**
          * Focuses the next widget which allows tabbing in unless
          * the current focused Widget disallows tabbing out.
          *
          * @see tabPrevious
          */
        void tabNext();

        /**
          * Focuses the previous widget which allows tabbing in unless
          * current focused widget disallows tabbing out.
          *
          * @see tabNext
          */
        void tabPrevious();

        /**
          * Gets the widget being dragged. Used by the Gui class to
          * keep track of the dragged widget.
          *
          * @return the widget being dragged.
          * @see setDraggedWidget
          */
        Widget* getDraggedWidget() const A_WARN_UNUSED;

        /**
          * Sets the widget being dragged. Used by the Gui class to
          * keep track of the dragged widget.
          *
          * @param draggedWidget The widget being dragged.
          * @see getDraggedWidget
          */
        void setDraggedWidget(Widget *const draggedWidget);

        /**
          * Gets the last widget with the mouse. Used by the Gui class
          * to keep track the last widget with the mouse.
          *
          * @return The last widget with the mouse.
          * @see setLastWidgetWithMouse
          */
        Widget* getLastWidgetWithMouse() const A_WARN_UNUSED;

        /**
          * Sets the last widget with the mouse. Used by the Gui class
          * to keep track the last widget with the mouse.
          *
          * @param lastWidgetWithMouse The last widget with the mouse.
          * @see getLastWidgetWithMouse
          */
        void setLastWidgetWithMouse(Widget *const lastWidgetWithMouse);

        /**
          * Gets the last widget with modal focus.
          *
          * @return The last widget with modal focus.
          * @see setLastWidgetWithModalFocus
          */
        Widget* getLastWidgetWithModalFocus() const A_WARN_UNUSED;

        /**
          * Sets the last widget with modal focus.
          *
          * @param widget The last widget with modal focus.
          * @see getLastWidgetWithModalFocus
          */
        void setLastWidgetWithModalFocus(Widget *const widget);

        /**
          * Gets the last widget with modal mouse input focus.
          *
          * @return The last widget with modal mouse input focus.
          * @see setLastWidgetWithModalMouseInputFocus
          */
        Widget* getLastWidgetWithModalMouseInputFocus() const A_WARN_UNUSED;

        /**
          * Sets the last widget with modal mouse input focus.
          *
          * @param widget The last widget with modal mouse input focus.
          * @see getLastWidgetWithModalMouseInputFocus
          */
        void setLastWidgetWithModalMouseInputFocus(Widget *const widget);

        /**
          * Gets the last widget pressed. Used by the Gui class to keep track
          * of pressed widgets.
          *
          * @return The last widget pressed.
          * @see setLastWidgetPressed
          */
        Widget* getLastWidgetPressed() const A_WARN_UNUSED;

        /**
          * Sets the last widget pressed. Used by the Gui class to keep track
          * of pressed widgets.
          *
          * @param lastWidgetPressed The last widget pressed.
          * @see getLastWidgetPressed
          */
        void setLastWidgetPressed(Widget *const lastWidgetPressed);

    private:
        /**
         * Checks to see if the widget tabbed to is in a window, and if it is,
         * it requests the window be moved to the top.
         */
        void checkForWindow() const;

        /**
         * Distributes a focus lost event.
         *
         * @param focusEvent the event to distribute.
         */
        static void distributeFocusLostEvent(const Event& focusEvent);

        /**
         * Distributes a focus gained event.
         *
         * @param focusEvent the event to distribute.
         */
        static void distributeFocusGainedEvent(const Event& focusEvent);

        /**
         * Typedef.
         */
        typedef std::vector<Widget*> WidgetVector;

        /**
         * Typedef.
         */
        typedef WidgetVector::iterator WidgetIterator;

        /**
         * Holds the widgets currently being handled by the
         * focus handler.
         */
        WidgetVector mWidgets;

        /**
         * Holds the focused widget. NULL if no widget has focus.
         */
        Widget* mFocusedWidget;

        /**
         * Holds the modal focused widget. NULL if no widget has
         * modal focused.
         */
        Widget* mModalFocusedWidget;

        /**
         * Holds the modal mouse input focused widget. NULL if no widget
         * is being dragged.
         */
        Widget* mModalMouseInputFocusedWidget;

        /**
         * Holds the dragged widget. NULL if no widget is
         * being dragged.
         */
        Widget* mDraggedWidget;

        /**
         * Holds the last widget with the mouse.
         */
        Widget* mLastWidgetWithMouse;

        /**
         * Holds the last widget with modal focus.
         */
        Widget* mLastWidgetWithModalFocus;

        /**
         * Holds the last widget with modal mouse input focus.
         */
        Widget* mLastWidgetWithModalMouseInputFocus;

        /**
         * Holds the last widget pressed.
         */
        Widget* mLastWidgetPressed;

        /**
         * Stack of widgets that have requested modal forcus.
         */
        std::list<Widget*> mModalStack;
};

#endif  // GUI_FOCUSHANDLER_H