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
|
//
// "$Id: Fl_Widget.cxx,v 1.5.2.4.2.22 2003/01/30 21:42:58 easysw Exp $"
//
// Base widget class for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2003 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// 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.
//
// Please report all bugs and problems to "fltk-bugs@fltk.org".
//
#include <FL/Fl.H>
#include <FL/Fl_Widget.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Tooltip.H>
#include <FL/fl_draw.H>
////////////////////////////////////////////////////////////////
// for compatability with Forms, all widgets without callbacks are
// inserted into a "queue" when they are activated, and the forms
// compatability interaction functions (fl_do_events, etc) will
// read one widget at a time from this queue and return it:
const int QUEUE_SIZE = 20;
static Fl_Widget *obj_queue[QUEUE_SIZE];
static int obj_head, obj_tail;
void Fl_Widget::default_callback(Fl_Widget *o, void * /*v*/) {
#if 0
// This is necessary for strict forms compatability but is confusing.
// Use the parent's callback if this widget does not have one.
for (Fl_Widget *p = o->parent(); p; p = p->parent())
if (p->callback() != default_callback) {
p->do_callback(o,v);
return;
}
#endif
obj_queue[obj_head++] = o;
if (obj_head >= QUEUE_SIZE) obj_head = 0;
if (obj_head == obj_tail) {
obj_tail++;
if (obj_tail >= QUEUE_SIZE) obj_tail = 0;
}
}
Fl_Widget *Fl::readqueue() {
if (obj_tail==obj_head) return 0;
Fl_Widget *o = obj_queue[obj_tail++];
if (obj_tail >= QUEUE_SIZE) obj_tail = 0;
return o;
}
////////////////////////////////////////////////////////////////
int Fl_Widget::handle(int) {
return 0;
}
int FL_NORMAL_SIZE = 14;
Fl_Widget::Fl_Widget(int X, int Y, int W, int H, const char* L) {
x_ = X; y_ = Y; w_ = W; h_ = H;
label_.value = L;
label_.image = 0;
label_.deimage = 0;
label_.type = FL_NORMAL_LABEL;
label_.font = FL_HELVETICA;
label_.size = (uchar)FL_NORMAL_SIZE;
label_.color = FL_BLACK;
tooltip_ = 0;
callback_ = default_callback;
user_data_ = 0;
type_ = 0;
flags_ = VISIBLE_FOCUS;
damage_ = 0;
box_ = FL_NO_BOX;
color_ = FL_GRAY;
color2_ = FL_GRAY;
align_ = FL_ALIGN_CENTER;
when_ = FL_WHEN_RELEASE;
parent_ = 0;
if (Fl_Group::current()) Fl_Group::current()->add(this);
}
void Fl_Widget::resize(int X, int Y, int W, int H) {
x_ = X; y_ = Y; w_ = W; h_ = H;
}
// this is useful for parent widgets to call to resize children:
int Fl_Widget::damage_resize(int X, int Y, int W, int H) {
if (x() == X && y() == Y && w() == W && h() == H) return 0;
resize(X, Y, W, H);
redraw();
return 1;
}
int Fl_Widget::take_focus() {
if (!takesevents()) return 0;
if (!visible_focus()) return 0;
if (!handle(FL_FOCUS)) return 0; // see if it wants it
if (contains(Fl::focus())) return 1; // it called Fl::focus for us
Fl::focus(this);
return 1;
}
extern void fl_throw_focus(Fl_Widget*); // in Fl_x.cxx
// Destruction does not remove from any parent group! And groups when
// destroyed destroy all their children. This is convienent and fast.
// However, it is only legal to destroy a "root" such as an Fl_Window,
// and automatic destructors may be called.
Fl_Widget::~Fl_Widget() {
parent_ = 0; // Don't throw focus to a parent widget.
fl_throw_focus(this);
}
// draw a focus box for the widget...
void
Fl_Widget::draw_focus(Fl_Boxtype B, int X, int Y, int W, int H) const {
if (!Fl::visible_focus()) return;
switch (B) {
case FL_DOWN_BOX:
case FL_DOWN_FRAME:
case FL_THIN_DOWN_BOX:
case FL_THIN_DOWN_FRAME:
X ++;
Y ++;
default:
break;
}
fl_color(fl_contrast(FL_BLACK, color()));
#if defined(WIN32) || defined(__APPLE__)
// Windows 95/98/ME do not implement the dotted line style, so draw
// every other pixel around the focus area...
//
// Also, QuickDraw (MacOS) does not support line styles specifically,
// and the hack we use in fl_line_style() will not draw horizontal lines
// on odd-numbered rows...
int i, xx, yy;
X += Fl::box_dx(B);
Y += Fl::box_dy(B);
W -= Fl::box_dw(B) + 2;
H -= Fl::box_dh(B) + 2;
for (xx = 0, i = 1; xx < W; xx ++, i ++) if (i & 1) fl_point(X + xx, Y);
for (yy = 0; yy < H; yy ++, i ++) if (i & 1) fl_point(X + W, Y + yy);
for (xx = W; xx > 0; xx --, i ++) if (i & 1) fl_point(X + xx, Y + H);
for (yy = H; yy > 0; yy --, i ++) if (i & 1) fl_point(X, Y + yy);
#else
fl_line_style(FL_DOT);
fl_rect(X + Fl::box_dx(B), Y + Fl::box_dy(B),
W - Fl::box_dw(B) - 1, H - Fl::box_dh(B) - 1);
fl_line_style(FL_SOLID);
#endif // WIN32
}
void Fl_Widget::activate() {
if (!active()) {
clear_flag(INACTIVE);
if (active_r()) {
redraw();
redraw_label();
handle(FL_ACTIVATE);
if (inside(Fl::focus())) Fl::focus()->take_focus();
}
}
}
void Fl_Widget::deactivate() {
if (active_r()) {
set_flag(INACTIVE);
redraw();
redraw_label();
handle(FL_DEACTIVATE);
fl_throw_focus(this);
} else {
set_flag(INACTIVE);
}
}
int Fl_Widget::active_r() const {
for (const Fl_Widget* o = this; o; o = o->parent())
if (!o->active()) return 0;
return 1;
}
void Fl_Widget::show() {
if (!visible()) {
clear_flag(INVISIBLE);
if (visible_r()) {
redraw();
redraw_label();
handle(FL_SHOW);
if (inside(Fl::focus())) Fl::focus()->take_focus();
}
}
}
void Fl_Widget::hide() {
if (visible_r()) {
set_flag(INVISIBLE);
for (Fl_Widget *p = parent(); p; p = p->parent())
if (p->box() || !p->parent()) {p->redraw(); break;}
handle(FL_HIDE);
fl_throw_focus(this);
} else {
set_flag(INVISIBLE);
}
}
int Fl_Widget::visible_r() const {
for (const Fl_Widget* o = this; o; o = o->parent())
if (!o->visible()) return 0;
return 1;
}
// return true if widget is inside (or equal to) this:
// Returns false for null widgets.
int Fl_Widget::contains(const Fl_Widget *o) const {
for (; o; o = o->parent_) if (o == this) return 1;
return 0;
}
//
// End of "$Id: Fl_Widget.cxx,v 1.5.2.4.2.22 2003/01/30 21:42:58 easysw Exp $".
//
|
