source: trunk/examples/graphicsview/diagramscene/mainwindow.cpp@ 11

Last change on this file since 11 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 20.7 KB
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1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information (qt-info@nokia.com)
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
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11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
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17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
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22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
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26** package.
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28** GNU General Public License Usage
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33** ensure the GNU General Public License version 3.0 requirements will be
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40****************************************************************************/
41
42#include <QtGui>
43#include <QLabel>
44
45#include "mainwindow.h"
46#include "diagramitem.h"
47#include "diagramscene.h"
48#include "diagramtextitem.h"
49
50const int InsertTextButton = 10;
51
52//! [0]
53MainWindow::MainWindow()
54{
55 createActions();
56 createToolBox();
57 createMenus();
58
59 scene = new DiagramScene(itemMenu);
60 scene->setSceneRect(QRectF(0, 0, 5000, 5000));
61 connect(scene, SIGNAL(itemInserted(DiagramItem *)),
62 this, SLOT(itemInserted(DiagramItem *)));
63 connect(scene, SIGNAL(textInserted(QGraphicsTextItem *)),
64 this, SLOT(textInserted(QGraphicsTextItem *)));
65 connect(scene, SIGNAL(itemSelected(QGraphicsItem *)),
66 this, SLOT(itemSelected(QGraphicsItem *)));
67 createToolbars();
68
69 QHBoxLayout *layout = new QHBoxLayout;
70 layout->addWidget(toolBox);
71 view = new QGraphicsView(scene);
72 layout->addWidget(view);
73
74 QWidget *widget = new QWidget;
75 widget->setLayout(layout);
76
77 setCentralWidget(widget);
78 setWindowTitle(tr("Diagramscene"));
79}
80//! [0]
81
82//! [1]
83void MainWindow::backgroundButtonGroupClicked(QAbstractButton *button)
84{
85 QList<QAbstractButton *> buttons = backgroundButtonGroup->buttons();
86 foreach (QAbstractButton *myButton, buttons) {
87 if (myButton != button)
88 button->setChecked(false);
89 }
90 QString text = button->text();
91 if (text == tr("Blue Grid"))
92 scene->setBackgroundBrush(QPixmap(":/images/background1.png"));
93 else if (text == tr("White Grid"))
94 scene->setBackgroundBrush(QPixmap(":/images/background2.png"));
95 else if (text == tr("Gray Grid"))
96 scene->setBackgroundBrush(QPixmap(":/images/background3.png"));
97 else
98 scene->setBackgroundBrush(QPixmap(":/images/background4.png"));
99
100 scene->update();
101 view->update();
102}
103//! [1]
104
105//! [2]
106void MainWindow::buttonGroupClicked(int id)
107{
108 QList<QAbstractButton *> buttons = buttonGroup->buttons();
109 foreach (QAbstractButton *button, buttons) {
110 if (buttonGroup->button(id) != button)
111 button->setChecked(false);
112 }
113 if (id == InsertTextButton) {
114 scene->setMode(DiagramScene::InsertText);
115 } else {
116 scene->setItemType(DiagramItem::DiagramType(id));
117 scene->setMode(DiagramScene::InsertItem);
118 }
119}
120//! [2]
121
122//! [3]
123void MainWindow::deleteItem()
124{
125 foreach (QGraphicsItem *item, scene->selectedItems()) {
126 if (item->type() == DiagramItem::Type) {
127 qgraphicsitem_cast<DiagramItem *>(item)->removeArrows();
128 }
129 scene->removeItem(item);
130 }
131}
132//! [3]
133
134//! [4]
135void MainWindow::pointerGroupClicked(int)
136{
137 scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
138}
139//! [4]
140
141//! [5]
142void MainWindow::bringToFront()
143{
144 if (scene->selectedItems().isEmpty())
145 return;
146
147 QGraphicsItem *selectedItem = scene->selectedItems().first();
148 QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
149
150 qreal zValue = 0;
151 foreach (QGraphicsItem *item, overlapItems) {
152 if (item->zValue() >= zValue &&
153 item->type() == DiagramItem::Type)
154 zValue = item->zValue() + 0.1;
155 }
156 selectedItem->setZValue(zValue);
157}
158//! [5]
159
160//! [6]
161void MainWindow::sendToBack()
162{
163 if (scene->selectedItems().isEmpty())
164 return;
165
166 QGraphicsItem *selectedItem = scene->selectedItems().first();
167 QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
168
169 qreal zValue = 0;
170 foreach (QGraphicsItem *item, overlapItems) {
171 if (item->zValue() <= zValue &&
172 item->type() == DiagramItem::Type)
173 zValue = item->zValue() - 0.1;
174 }
175 selectedItem->setZValue(zValue);
176}
177//! [6]
178
179//! [7]
180void MainWindow::itemInserted(DiagramItem *item)
181{
182 pointerTypeGroup->button(int(DiagramScene::MoveItem))->setChecked(true);
183 scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
184 buttonGroup->button(int(item->diagramType()))->setChecked(false);
185}
186//! [7]
187
188//! [8]
189void MainWindow::textInserted(QGraphicsTextItem *)
190{
191 buttonGroup->button(InsertTextButton)->setChecked(false);
192 scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
193}
194//! [8]
195
196//! [9]
197void MainWindow::currentFontChanged(const QFont &)
198{
199 handleFontChange();
200}
201//! [9]
202
203//! [10]
204void MainWindow::fontSizeChanged(const QString &)
205{
206 handleFontChange();
207}
208//! [10]
209
210//! [11]
211void MainWindow::sceneScaleChanged(const QString &scale)
212{
213 double newScale = scale.left(scale.indexOf(tr("%"))).toDouble() / 100.0;
214 QMatrix oldMatrix = view->matrix();
215 view->resetMatrix();
216 view->translate(oldMatrix.dx(), oldMatrix.dy());
217 view->scale(newScale, newScale);
218}
219//! [11]
220
221//! [12]
222void MainWindow::textColorChanged()
223{
224 textAction = qobject_cast<QAction *>(sender());
225 fontColorToolButton->setIcon(createColorToolButtonIcon(
226 ":/images/textpointer.png",
227 qVariantValue<QColor>(textAction->data())));
228 textButtonTriggered();
229}
230//! [12]
231
232//! [13]
233void MainWindow::itemColorChanged()
234{
235 fillAction = qobject_cast<QAction *>(sender());
236 fillColorToolButton->setIcon(createColorToolButtonIcon(
237 ":/images/floodfill.png",
238 qVariantValue<QColor>(fillAction->data())));
239 fillButtonTriggered();
240}
241//! [13]
242
243//! [14]
244void MainWindow::lineColorChanged()
245{
246 lineAction = qobject_cast<QAction *>(sender());
247 lineColorToolButton->setIcon(createColorToolButtonIcon(
248 ":/images/linecolor.png",
249 qVariantValue<QColor>(lineAction->data())));
250 lineButtonTriggered();
251}
252//! [14]
253
254//! [15]
255void MainWindow::textButtonTriggered()
256{
257 scene->setTextColor(qVariantValue<QColor>(textAction->data()));
258}
259//! [15]
260
261//! [16]
262void MainWindow::fillButtonTriggered()
263{
264 scene->setItemColor(qVariantValue<QColor>(fillAction->data()));
265}
266//! [16]
267
268//! [17]
269void MainWindow::lineButtonTriggered()
270{
271 scene->setLineColor(qVariantValue<QColor>(lineAction->data()));
272}
273//! [17]
274
275//! [18]
276void MainWindow::handleFontChange()
277{
278 QFont font = fontCombo->currentFont();
279 font.setPointSize(fontSizeCombo->currentText().toInt());
280 font.setWeight(boldAction->isChecked() ? QFont::Bold : QFont::Normal);
281 font.setItalic(italicAction->isChecked());
282 font.setUnderline(underlineAction->isChecked());
283
284 scene->setFont(font);
285}
286//! [18]
287
288//! [19]
289void MainWindow::itemSelected(QGraphicsItem *item)
290{
291 DiagramTextItem *textItem =
292 qgraphicsitem_cast<DiagramTextItem *>(item);
293
294 QFont font = textItem->font();
295 QColor color = textItem->defaultTextColor();
296 fontCombo->setCurrentFont(font);
297 fontSizeCombo->setEditText(QString().setNum(font.pointSize()));
298 boldAction->setChecked(font.weight() == QFont::Bold);
299 italicAction->setChecked(font.italic());
300 underlineAction->setChecked(font.underline());
301}
302//! [19]
303
304//! [20]
305void MainWindow::about()
306{
307 QMessageBox::about(this, tr("About Diagram Scene"),
308 tr("The <b>Diagram Scene</b> example shows "
309 "use of the graphics framework."));
310}
311//! [20]
312
313//! [21]
314void MainWindow::createToolBox()
315{
316 buttonGroup = new QButtonGroup;
317 buttonGroup->setExclusive(false);
318 connect(buttonGroup, SIGNAL(buttonClicked(int)),
319 this, SLOT(buttonGroupClicked(int)));
320 QGridLayout *layout = new QGridLayout;
321 layout->addWidget(createCellWidget(tr("Conditional"),
322 DiagramItem::Conditional), 0, 0);
323 layout->addWidget(createCellWidget(tr("Process"),
324 DiagramItem::Step),0, 1);
325 layout->addWidget(createCellWidget(tr("Input/Output"),
326 DiagramItem::Io), 1, 0);
327//! [21]
328
329 QToolButton *textButton = new QToolButton;
330 textButton->setCheckable(true);
331 buttonGroup->addButton(textButton, InsertTextButton);
332 textButton->setIcon(QIcon(QPixmap(":/images/textpointer.png")
333 .scaled(30, 30)));
334 textButton->setIconSize(QSize(50, 50));
335 QGridLayout *textLayout = new QGridLayout;
336 textLayout->addWidget(textButton, 0, 0, Qt::AlignHCenter);
337 textLayout->addWidget(new QLabel(tr("Text")), 1, 0, Qt::AlignCenter);
338 QWidget *textWidget = new QWidget;
339 textWidget->setLayout(textLayout);
340 layout->addWidget(textWidget, 1, 1);
341
342 layout->setRowStretch(3, 10);
343 layout->setColumnStretch(2, 10);
344
345 QWidget *itemWidget = new QWidget;
346 itemWidget->setLayout(layout);
347
348 backgroundButtonGroup = new QButtonGroup;
349 connect(backgroundButtonGroup, SIGNAL(buttonClicked(QAbstractButton *)),
350 this, SLOT(backgroundButtonGroupClicked(QAbstractButton *)));
351
352 QGridLayout *backgroundLayout = new QGridLayout;
353 backgroundLayout->addWidget(createBackgroundCellWidget(tr("Blue Grid"),
354 ":/images/background1.png"), 0, 0);
355 backgroundLayout->addWidget(createBackgroundCellWidget(tr("White Grid"),
356 ":/images/background2.png"), 0, 1);
357 backgroundLayout->addWidget(createBackgroundCellWidget(tr("Gray Grid"),
358 ":/images/background3.png"), 1, 0);
359 backgroundLayout->addWidget(createBackgroundCellWidget(tr("No Grid"),
360 ":/images/background4.png"), 1, 1);
361
362 backgroundLayout->setRowStretch(2, 10);
363 backgroundLayout->setColumnStretch(2, 10);
364
365 QWidget *backgroundWidget = new QWidget;
366 backgroundWidget->setLayout(backgroundLayout);
367
368
369//! [22]
370 toolBox = new QToolBox;
371 toolBox->setSizePolicy(QSizePolicy(QSizePolicy::Maximum, QSizePolicy::Ignored));
372 toolBox->setMinimumWidth(itemWidget->sizeHint().width());
373 toolBox->addItem(itemWidget, tr("Basic Flowchart Shapes"));
374 toolBox->addItem(backgroundWidget, tr("Backgrounds"));
375}
376//! [22]
377
378//! [23]
379void MainWindow::createActions()
380{
381 toFrontAction = new QAction(QIcon(":/images/bringtofront.png"),
382 tr("Bring to &Front"), this);
383 toFrontAction->setShortcut(tr("Ctrl+F"));
384 toFrontAction->setStatusTip(tr("Bring item to front"));
385 connect(toFrontAction, SIGNAL(triggered()),
386 this, SLOT(bringToFront()));
387//! [23]
388
389 sendBackAction = new QAction(QIcon(":/images/sendtoback.png"),
390 tr("Send to &Back"), this);
391 sendBackAction->setShortcut(tr("Ctrl+B"));
392 sendBackAction->setStatusTip(tr("Send item to back"));
393 connect(sendBackAction, SIGNAL(triggered()),
394 this, SLOT(sendToBack()));
395
396 deleteAction = new QAction(QIcon(":/images/delete.png"),
397 tr("&Delete"), this);
398 deleteAction->setShortcut(tr("Delete"));
399 deleteAction->setStatusTip(tr("Delete item from diagram"));
400 connect(deleteAction, SIGNAL(triggered()),
401 this, SLOT(deleteItem()));
402
403 exitAction = new QAction(tr("E&xit"), this);
404 exitAction->setShortcut(tr("Ctrl+X"));
405 exitAction->setStatusTip(tr("Quit Scenediagram example"));
406 connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
407
408 boldAction = new QAction(tr("Bold"), this);
409 boldAction->setCheckable(true);
410 QPixmap pixmap(":/images/bold.png");
411 boldAction->setIcon(QIcon(pixmap));
412 boldAction->setShortcut(tr("Ctrl+B"));
413 connect(boldAction, SIGNAL(triggered()),
414 this, SLOT(handleFontChange()));
415
416 italicAction = new QAction(QIcon(":/images/italic.png"),
417 tr("Italic"), this);
418 italicAction->setCheckable(true);
419 italicAction->setShortcut(tr("Ctrl+I"));
420 connect(italicAction, SIGNAL(triggered()),
421 this, SLOT(handleFontChange()));
422
423 underlineAction = new QAction(QIcon(":/images/underline.png"),
424 tr("Underline"), this);
425 underlineAction->setCheckable(true);
426 underlineAction->setShortcut(tr("Ctrl+U"));
427 connect(underlineAction, SIGNAL(triggered()),
428 this, SLOT(handleFontChange()));
429
430 aboutAction = new QAction(tr("A&bout"), this);
431 aboutAction->setShortcut(tr("Ctrl+B"));
432 connect(aboutAction, SIGNAL(triggered()),
433 this, SLOT(about()));
434}
435
436//! [24]
437void MainWindow::createMenus()
438{
439 fileMenu = menuBar()->addMenu(tr("&File"));
440 fileMenu->addAction(exitAction);
441
442 itemMenu = menuBar()->addMenu(tr("&Item"));
443 itemMenu->addAction(deleteAction);
444 itemMenu->addSeparator();
445 itemMenu->addAction(toFrontAction);
446 itemMenu->addAction(sendBackAction);
447
448 aboutMenu = menuBar()->addMenu(tr("&Help"));
449 aboutMenu->addAction(aboutAction);
450}
451//! [24]
452
453//! [25]
454void MainWindow::createToolbars()
455{
456//! [25]
457 editToolBar = addToolBar(tr("Edit"));
458 editToolBar->addAction(deleteAction);
459 editToolBar->addAction(toFrontAction);
460 editToolBar->addAction(sendBackAction);
461
462 fontCombo = new QFontComboBox();
463 fontSizeCombo = new QComboBox();
464 connect(fontCombo, SIGNAL(currentFontChanged(const QFont &)),
465 this, SLOT(currentFontChanged(const QFont &)));
466
467 fontSizeCombo = new QComboBox;
468 fontSizeCombo->setEditable(true);
469 for (int i = 8; i < 30; i = i + 2)
470 fontSizeCombo->addItem(QString().setNum(i));
471 QIntValidator *validator = new QIntValidator(2, 64, this);
472 fontSizeCombo->setValidator(validator);
473 connect(fontSizeCombo, SIGNAL(currentIndexChanged(const QString &)),
474 this, SLOT(fontSizeChanged(const QString &)));
475
476 fontColorToolButton = new QToolButton;
477 fontColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
478 fontColorToolButton->setMenu(createColorMenu(SLOT(textColorChanged()),
479 Qt::black));
480 textAction = fontColorToolButton->menu()->defaultAction();
481 fontColorToolButton->setIcon(createColorToolButtonIcon(
482 ":/images/textpointer.png", Qt::black));
483 fontColorToolButton->setAutoFillBackground(true);
484 connect(fontColorToolButton, SIGNAL(clicked()),
485 this, SLOT(textButtonTriggered()));
486
487//! [26]
488 fillColorToolButton = new QToolButton;
489 fillColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
490 fillColorToolButton->setMenu(createColorMenu(SLOT(itemColorChanged()),
491 Qt::white));
492 fillAction = fillColorToolButton->menu()->defaultAction();
493 fillColorToolButton->setIcon(createColorToolButtonIcon(
494 ":/images/floodfill.png", Qt::white));
495 connect(fillColorToolButton, SIGNAL(clicked()),
496 this, SLOT(fillButtonTriggered()));
497//! [26]
498
499 lineColorToolButton = new QToolButton;
500 lineColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
501 lineColorToolButton->setMenu(createColorMenu(SLOT(lineColorChanged()),
502 Qt::black));
503 lineAction = lineColorToolButton->menu()->defaultAction();
504 lineColorToolButton->setIcon(createColorToolButtonIcon(
505 ":/images/linecolor.png", Qt::black));
506 connect(lineColorToolButton, SIGNAL(clicked()),
507 this, SLOT(lineButtonTriggered()));
508
509 textToolBar = addToolBar(tr("Font"));
510 textToolBar->addWidget(fontCombo);
511 textToolBar->addWidget(fontSizeCombo);
512 textToolBar->addAction(boldAction);
513 textToolBar->addAction(italicAction);
514 textToolBar->addAction(underlineAction);
515
516 colorToolBar = addToolBar(tr("Color"));
517 colorToolBar->addWidget(fontColorToolButton);
518 colorToolBar->addWidget(fillColorToolButton);
519 colorToolBar->addWidget(lineColorToolButton);
520
521 QToolButton *pointerButton = new QToolButton;
522 pointerButton->setCheckable(true);
523 pointerButton->setChecked(true);
524 pointerButton->setIcon(QIcon(":/images/pointer.png"));
525 QToolButton *linePointerButton = new QToolButton;
526 linePointerButton->setCheckable(true);
527 linePointerButton->setIcon(QIcon(":/images/linepointer.png"));
528
529 pointerTypeGroup = new QButtonGroup;
530 pointerTypeGroup->addButton(pointerButton, int(DiagramScene::MoveItem));
531 pointerTypeGroup->addButton(linePointerButton,
532 int(DiagramScene::InsertLine));
533 connect(pointerTypeGroup, SIGNAL(buttonClicked(int)),
534 this, SLOT(pointerGroupClicked(int)));
535
536 sceneScaleCombo = new QComboBox;
537 QStringList scales;
538 scales << tr("50%") << tr("75%") << tr("100%") << tr("125%") << tr("150%");
539 sceneScaleCombo->addItems(scales);
540 sceneScaleCombo->setCurrentIndex(2);
541 connect(sceneScaleCombo, SIGNAL(currentIndexChanged(const QString &)),
542 this, SLOT(sceneScaleChanged(const QString &)));
543
544 pointerToolbar = addToolBar(tr("Pointer type"));
545 pointerToolbar->addWidget(pointerButton);
546 pointerToolbar->addWidget(linePointerButton);
547 pointerToolbar->addWidget(sceneScaleCombo);
548//! [27]
549}
550//! [27]
551
552//! [28]
553QWidget *MainWindow::createBackgroundCellWidget(const QString &text,
554 const QString &image)
555{
556 QToolButton *button = new QToolButton;
557 button->setText(text);
558 button->setIcon(QIcon(image));
559 button->setIconSize(QSize(50, 50));
560 button->setCheckable(true);
561 backgroundButtonGroup->addButton(button);
562
563 QGridLayout *layout = new QGridLayout;
564 layout->addWidget(button, 0, 0, Qt::AlignHCenter);
565 layout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter);
566
567 QWidget *widget = new QWidget;
568 widget->setLayout(layout);
569
570 return widget;
571}
572//! [28]
573
574//! [29]
575QWidget *MainWindow::createCellWidget(const QString &text,
576 DiagramItem::DiagramType type)
577{
578
579 DiagramItem item(type, itemMenu);
580 QIcon icon(item.image());
581
582 QToolButton *button = new QToolButton;
583 button->setIcon(icon);
584 button->setIconSize(QSize(50, 50));
585 button->setCheckable(true);
586 buttonGroup->addButton(button, int(type));
587
588 QGridLayout *layout = new QGridLayout;
589 layout->addWidget(button, 0, 0, Qt::AlignHCenter);
590 layout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter);
591
592 QWidget *widget = new QWidget;
593 widget->setLayout(layout);
594
595 return widget;
596}
597//! [29]
598
599//! [30]
600QMenu *MainWindow::createColorMenu(const char *slot, QColor defaultColor)
601{
602 QList<QColor> colors;
603 colors << Qt::black << Qt::white << Qt::red << Qt::blue << Qt::yellow;
604 QStringList names;
605 names << tr("black") << tr("white") << tr("red") << tr("blue")
606 << tr("yellow");
607
608 QMenu *colorMenu = new QMenu;
609 for (int i = 0; i < colors.count(); ++i) {
610 QAction *action = new QAction(names.at(i), this);
611 action->setData(colors.at(i));
612 action->setIcon(createColorIcon(colors.at(i)));
613 connect(action, SIGNAL(triggered()),
614 this, slot);
615 colorMenu->addAction(action);
616 if (colors.at(i) == defaultColor) {
617 colorMenu->setDefaultAction(action);
618 }
619 }
620 return colorMenu;
621}
622//! [30]
623
624//! [31]
625QIcon MainWindow::createColorToolButtonIcon(const QString &imageFile,
626 QColor color)
627{
628 QPixmap pixmap(50, 80);
629 pixmap.fill(Qt::transparent);
630 QPainter painter(&pixmap);
631 QPixmap image(imageFile);
632 QRect target(0, 0, 50, 60);
633 QRect source(0, 0, 42, 42);
634 painter.fillRect(QRect(0, 60, 50, 80), color);
635 painter.drawPixmap(target, image, source);
636
637 return QIcon(pixmap);
638}
639//! [31]
640
641//! [32]
642QIcon MainWindow::createColorIcon(QColor color)
643{
644 QPixmap pixmap(20, 20);
645 QPainter painter(&pixmap);
646 painter.setPen(Qt::NoPen);
647 painter.fillRect(QRect(0, 0, 20, 20), color);
648
649 return QIcon(pixmap);
650}
651//! [32]
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