Skip to content
Navigation Menu
{{ message }}
forked from cirosantilli/cpp-cheat
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmain.cpp
More file actions
335 lines (266 loc) · 11 KB
/
Copy pathmain.cpp
File metadata and controls
335 lines (266 loc) · 11 KB
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
#include <iostream>
#include <sstream>
#include <QApplication>
#include <QDesktopWidget>
#include <QFrame>
#include <QGridLayout>
#include <QLabel>
#include <QMainWindow>
#include <QMenu>
#include <QMenuBar>
#include <QIcon>
#include <QPushButton>
#include <QTabWidget>
#include <QWidget>
// tr
#include <QObject>
#include <QShortcut>
// enum Qt::AlignmentFlag {AlignTop, ...}
#include <Qt>
#include "SlotTest.h"
#include "ui_qt_designer.h"
int buttonHeight = 25;
void SlotTest::cout() {
std::cout << "i = " << i << std::endl;
}
void SlotTest::inc() {
i++;
}
void SlotTest::title() {
std::stringstream newTitle;
newTitle << "i = " << i;
window->setWindowTitle(newTitle.str().c_str());
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
// For most purposes, this could also be a QWidget.
QMainWindow window;
SlotTest slotTest(&window);
QTabWidget *tabs = new QTabWidget(&window);
/*
The main GUI objects used to set the position of GUI objects are Widget and Layout.
#Widget
Can have fixed sizes.
Can set one single internal layout with `setLayout`.
Widgets in general don't have setAlignment, but some such as QLabel do,
so there is no need to embed them inside another layout for alignment.
#Layout
Cannot have fixed size.
Occupies its entire parent.
Can contain several inner:
- layouts via `addLayout`
- widgets via `addWidget`.
Possible determine the aligment of items (center, left, etc) inside it via `setAlignment`.
#MainWindow
Cannot do `setLayout`.
Has some extra functionality with respect to `Widget`.
#QString
Has no `std::string` constructor.
Solution: `QString::fromStdString(s)` or `QString(s.c_str())`
Convertion to `std::string`: <http://stackoverflow.com/questions/4214369/how-to-convert-qstring-to-stdstring>
As of 5.0, toStdString is good.
*/
/*
#PushButton
#connect
Connect takes:
- object 1
- signal 1
- object 2
- signal 2
When working with qmake, without modifying defaults,
declaration of QObjects with slots *must be in separate headers!*.
<http://stackoverflow.com/questions/13614593/linker-error-with-qt-signal-slot-example>
*/
QVBoxLayout *pushButtonLayout = new QVBoxLayout();
{
QPushButton *quit = new QPushButton(QObject::tr("quit"));
QObject::connect(quit, SIGNAL(clicked()), qApp, SLOT(quit()));
quit->setFixedHeight(buttonHeight);
//TODO why clicking on the button does nothing?
QPushButton *cout = new QPushButton(QObject::tr("cout"));
QObject::connect(cout, SIGNAL(clicked()), &slotTest, SLOT(cout()));
cout->setFixedHeight(buttonHeight);
QPushButton *inc = new QPushButton(QObject::tr("inc"));
QObject::connect(inc, SIGNAL(clicked()), &slotTest, SLOT(inc()));
inc->setFixedHeight(buttonHeight);
QPushButton *title = new QPushButton(QObject::tr("title"));
QObject::connect(title, SIGNAL(clicked()), &slotTest, SLOT(title()));
title->setFixedHeight(buttonHeight);
pushButtonLayout->addWidget(quit);
pushButtonLayout->addWidget(cout);
pushButtonLayout->addWidget(title);
pushButtonLayout->addWidget(inc);
pushButtonLayout->setAlignment(Qt::AlignTop);
}
QWidget *pushButtonWidget = new QWidget();
pushButtonWidget->setLayout(pushButtonLayout);
//#setCursor
QVBoxLayout *setCursorTabLayout = new QVBoxLayout();
{
QLabel *label = new QLabel("Hover the mouse over the frames:");
label->setAlignment(Qt::AlignCenter);
label->setFixedHeight(buttonHeight);
QHBoxLayout *framesLayout = new QHBoxLayout();
{
{
QFrame *frame = new QFrame(&window);
frame->setFrameStyle(QFrame::Box);
frame->setCursor(Qt::SizeAllCursor);
QHBoxLayout *frameLayout = new QHBoxLayout();
QLabel *label = new QLabel("SizeAllCursor", frame);
frameLayout->addWidget(label);
frameLayout->setAlignment(Qt::AlignCenter);
frame->setLayout(frameLayout);
framesLayout->addWidget(frame);
}
{
QFrame *frame = new QFrame(&window);
frame->setFrameStyle(QFrame::Box);
frame->setCursor(Qt::WaitCursor);
QHBoxLayout *frameLayout = new QHBoxLayout();
QLabel *label = new QLabel("WaitCursor", frame);
frameLayout->addWidget(label);
frameLayout->setAlignment(Qt::AlignCenter);
frame->setLayout(frameLayout);
framesLayout->addWidget(frame);
}
{
QFrame *frame = new QFrame(&window);
frame->setFrameStyle(QFrame::Box);
frame->setCursor(Qt::PointingHandCursor);
QHBoxLayout *frameLayout = new QHBoxLayout();
QLabel *label = new QLabel("PointingHandCursor", frame);
frameLayout->addWidget(label);
frameLayout->setAlignment(Qt::AlignCenter);
frame->setLayout(frameLayout);
framesLayout->addWidget(frame);
}
}
setCursorTabLayout->addWidget(label);
setCursorTabLayout->addLayout(framesLayout);
}
QWidget *setCursorWidget = new QWidget();
setCursorWidget->setLayout(setCursorTabLayout);
//#setToolTip
QVBoxLayout *setToolTipLayout = new QVBoxLayout();
{
QLabel *label = new QLabel("Hover the mouse over the frames and don't move it for a while:");
label->setAlignment(Qt::AlignCenter);
label->setFixedHeight(buttonHeight);
QHBoxLayout *framesLayout = new QHBoxLayout();
{
{
QFrame *frame = new QFrame(&window);
frame->setFrameStyle(QFrame::Box);
frame->setToolTip(QObject::tr("setToolTip left"));
QHBoxLayout *frameLayout = new QHBoxLayout();
QLabel *label = new QLabel("left", frame);
frameLayout->addWidget(label);
frameLayout->setAlignment(Qt::AlignCenter);
frame->setLayout(frameLayout);
framesLayout->addWidget(frame);
}
{
QFrame *frame = new QFrame(&window);
frame->setFrameStyle(QFrame::Box);
frame->setToolTip(QObject::tr("setToolTip right"));
QHBoxLayout *frameLayout = new QHBoxLayout();
QLabel *label = new QLabel("right", frame);
frameLayout->addWidget(label);
frameLayout->setAlignment(Qt::AlignCenter);
frame->setLayout(frameLayout);
framesLayout->addWidget(frame);
}
}
setToolTipLayout->addWidget(label);
setToolTipLayout->addLayout(framesLayout);
}
QWidget *setToolTipWidget = new QWidget();
setToolTipWidget->setLayout(setToolTipLayout);
//#Shortcut
QWidget *shortcutWidget = new QWidget();
{
QShortcut *mainWindowShortcut = new QShortcut(QKeySequence("Ctrl+Q"), &window);
QObject::connect(mainWindowShortcut, SIGNAL(activated()), qApp, SLOT(quit()));
/*
Shortcuts are only activated if the parent widget is active.
If there are two possible actions for a shortcut, TODO nothing happens, or undefined?
*/
QShortcut *tabShortcut = new QShortcut(QKeySequence("Ctrl+W"), shortcutWidget);
QObject::connect(tabShortcut, SIGNAL(activated()), &slotTest, SLOT(cout()));
QShortcut *tabShortcut2 = new QShortcut(QKeySequence("Ctrl+Q"), shortcutWidget);
QObject::connect(tabShortcut2, SIGNAL(activated()), &slotTest, SLOT(cout()));
QHBoxLayout *layout = new QHBoxLayout();
QLabel *label = new QLabel(
"<p>Shortcuts:</p>"
"<ul>"
"<li>Ctrl+Q : quit (global</li>"
"<li>Ctrl+Q : cout (local to this tab)</li>"
"<li>Ctrl+W : cout (local to this tab)</li>"
"<ul>\n"
,
shortcutWidget);
layout->addWidget(label);
layout->setAlignment(Qt::AlignCenter);
shortcutWidget->setLayout(layout);
}
//#MenuBar
{
QPixmap ico("ico.png");
QAction *cout = new QAction(ico, QObject::tr("&cout"), &window);
QAction *title = new QAction(QObject::tr("&title"), &window);
QAction *inc = new QAction(QObject::tr("&inc"), &window);
QAction *quit = new QAction(QObject::tr("&quit"), &window);
quit->setShortcut(Qt::CTRL + Qt::SHIFT +Qt::Key_Q);
QMenu *m1;
//menuBar method only exists for QMainWindow, not for QWidget.
m1 = window.menuBar()->addMenu(QObject::tr("m&1"));
m1->addAction(cout);
m1->addAction(title);
m1->addAction(inc);
m1->addSeparator();
m1->addAction(quit);
QObject::connect(quit, SIGNAL(triggered()), qApp, SLOT(quit()));
QObject::connect(title, SIGNAL(triggered()), &slotTest, SLOT(title()));
QObject::connect(cout, SIGNAL(triggered()), &slotTest, SLOT(cout()));
QObject::connect(inc, SIGNAL(triggered()), &slotTest, SLOT(inc()));
}
tabs->addTab(pushButtonWidget, QObject::tr("PushButton"));
tabs->addTab(setCursorWidget, QObject::tr("setCursor"));
tabs->addTab(setToolTipWidget, QObject::tr("setToolTip"));
tabs->addTab(shortcutWidget, QObject::tr("Shortcut"));
/*
#Qt Designer
See `ui` files.
#ui files
The `.ui` files are XML files that describe layout.
This XML format contains information that generates C++ layout code.
They are typically generated by the Qt Designer tool
(executable name `designer` under Ubuntu 13.10).
In order to process ui files, add to `qt.pro`:
FORMS += my.ui
This will generate a header file `ui_my.h` which you can include in your application.
The class name is that given in the Qt Editor to the top level object under the namespace `Ui::`.
*/
{
QWidget *widget = new QWidget;
Ui::QtDesignerWidget ui;
ui.setupUi(widget);
tabs->addTab(widget, QObject::tr("Qt Designer"));
}
//#window
window.setCentralWidget(tabs);
window.move(100, 200);
window.resize(600, 400);
window.setWindowTitle(QObject::tr("setWindowTitle"));
window.setWindowIcon(QIcon("ico.svg"));
window.show();
//#desktop
QDesktopWidget *desktop = QApplication::desktop();
std::cout << "desktop" << std::endl;
std::cout << "width() = " << desktop->width() << std::endl;
std::cout << "height() = " << desktop->height() << std::endl;
return app.exec();
}
You can’t perform that action at this time.