source: trunk/examples/graphicsview/diagramscene/mainwindow.cpp@ 843

Last change on this file since 843 was 651, checked in by Dmitry A. Kuminov, 16 years ago

trunk: Merged in qt 4.6.2 sources.
File size: 20.7 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the examples of the Qt Toolkit.
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9** $QT_BEGIN_LICENSE:LGPL$
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16** GNU Lesser General Public License Usage
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20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
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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 setUnifiedTitleAndToolBarOnMac(true);
80}
81//! [0]
82
83//! [1]
84void MainWindow::backgroundButtonGroupClicked(QAbstractButton *button)
85{
86 QList<QAbstractButton *> buttons = backgroundButtonGroup->buttons();
87 foreach (QAbstractButton *myButton, buttons) {
88 if (myButton != button)
89 button->setChecked(false);
90 }
91 QString text = button->text();
92 if (text == tr("Blue Grid"))
93 scene->setBackgroundBrush(QPixmap(":/images/background1.png"));
94 else if (text == tr("White Grid"))
95 scene->setBackgroundBrush(QPixmap(":/images/background2.png"));
96 else if (text == tr("Gray Grid"))
97 scene->setBackgroundBrush(QPixmap(":/images/background3.png"));
98 else
99 scene->setBackgroundBrush(QPixmap(":/images/background4.png"));
100
101 scene->update();
102 view->update();
103}
104//! [1]
105
106//! [2]
107void MainWindow::buttonGroupClicked(int id)
108{
109 QList<QAbstractButton *> buttons = buttonGroup->buttons();
110 foreach (QAbstractButton *button, buttons) {
111 if (buttonGroup->button(id) != button)
112 button->setChecked(false);
113 }
114 if (id == InsertTextButton) {
115 scene->setMode(DiagramScene::InsertText);
116 } else {
117 scene->setItemType(DiagramItem::DiagramType(id));
118 scene->setMode(DiagramScene::InsertItem);
119 }
120}
121//! [2]
122
123//! [3]
124void MainWindow::deleteItem()
125{
126 foreach (QGraphicsItem *item, scene->selectedItems()) {
127 if (item->type() == DiagramItem::Type) {
128 qgraphicsitem_cast<DiagramItem *>(item)->removeArrows();
129 }
130 scene->removeItem(item);
131 }
132}
133//! [3]
134
135//! [4]
136void MainWindow::pointerGroupClicked(int)
137{
138 scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
139}
140//! [4]
141
142//! [5]
143void MainWindow::bringToFront()
144{
145 if (scene->selectedItems().isEmpty())
146 return;
147
148 QGraphicsItem *selectedItem = scene->selectedItems().first();
149 QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
150
151 qreal zValue = 0;
152 foreach (QGraphicsItem *item, overlapItems) {
153 if (item->zValue() >= zValue &&
154 item->type() == DiagramItem::Type)
155 zValue = item->zValue() + 0.1;
156 }
157 selectedItem->setZValue(zValue);
158}
159//! [5]
160
161//! [6]
162void MainWindow::sendToBack()
163{
164 if (scene->selectedItems().isEmpty())
165 return;
166
167 QGraphicsItem *selectedItem = scene->selectedItems().first();
168 QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems();
169
170 qreal zValue = 0;
171 foreach (QGraphicsItem *item, overlapItems) {
172 if (item->zValue() <= zValue &&
173 item->type() == DiagramItem::Type)
174 zValue = item->zValue() - 0.1;
175 }
176 selectedItem->setZValue(zValue);
177}
178//! [6]
179
180//! [7]
181void MainWindow::itemInserted(DiagramItem *item)
182{
183 pointerTypeGroup->button(int(DiagramScene::MoveItem))->setChecked(true);
184 scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
185 buttonGroup->button(int(item->diagramType()))->setChecked(false);
186}
187//! [7]
188
189//! [8]
190void MainWindow::textInserted(QGraphicsTextItem *)
191{
192 buttonGroup->button(InsertTextButton)->setChecked(false);
193 scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId()));
194}
195//! [8]
196
197//! [9]
198void MainWindow::currentFontChanged(const QFont &)
199{
200 handleFontChange();
201}
202//! [9]
203
204//! [10]
205void MainWindow::fontSizeChanged(const QString &)
206{
207 handleFontChange();
208}
209//! [10]
210
211//! [11]
212void MainWindow::sceneScaleChanged(const QString &scale)
213{
214 double newScale = scale.left(scale.indexOf(tr("%"))).toDouble() / 100.0;
215 QMatrix oldMatrix = view->matrix();
216 view->resetMatrix();
217 view->translate(oldMatrix.dx(), oldMatrix.dy());
218 view->scale(newScale, newScale);
219}
220//! [11]
221
222//! [12]
223void MainWindow::textColorChanged()
224{
225 textAction = qobject_cast<QAction *>(sender());
226 fontColorToolButton->setIcon(createColorToolButtonIcon(
227 ":/images/textpointer.png",
228 qVariantValue<QColor>(textAction->data())));
229 textButtonTriggered();
230}
231//! [12]
232
233//! [13]
234void MainWindow::itemColorChanged()
235{
236 fillAction = qobject_cast<QAction *>(sender());
237 fillColorToolButton->setIcon(createColorToolButtonIcon(
238 ":/images/floodfill.png",
239 qVariantValue<QColor>(fillAction->data())));
240 fillButtonTriggered();
241}
242//! [13]
243
244//! [14]
245void MainWindow::lineColorChanged()
246{
247 lineAction = qobject_cast<QAction *>(sender());
248 lineColorToolButton->setIcon(createColorToolButtonIcon(
249 ":/images/linecolor.png",
250 qVariantValue<QColor>(lineAction->data())));
251 lineButtonTriggered();
252}
253//! [14]
254
255//! [15]
256void MainWindow::textButtonTriggered()
257{
258 scene->setTextColor(qVariantValue<QColor>(textAction->data()));
259}
260//! [15]
261
262//! [16]
263void MainWindow::fillButtonTriggered()
264{
265 scene->setItemColor(qVariantValue<QColor>(fillAction->data()));
266}
267//! [16]
268
269//! [17]
270void MainWindow::lineButtonTriggered()
271{
272 scene->setLineColor(qVariantValue<QColor>(lineAction->data()));
273}
274//! [17]
275
276//! [18]
277void MainWindow::handleFontChange()
278{
279 QFont font = fontCombo->currentFont();
280 font.setPointSize(fontSizeCombo->currentText().toInt());
281 font.setWeight(boldAction->isChecked() ? QFont::Bold : QFont::Normal);
282 font.setItalic(italicAction->isChecked());
283 font.setUnderline(underlineAction->isChecked());
284
285 scene->setFont(font);
286}
287//! [18]
288
289//! [19]
290void MainWindow::itemSelected(QGraphicsItem *item)
291{
292 DiagramTextItem *textItem =
293 qgraphicsitem_cast<DiagramTextItem *>(item);
294
295 QFont font = textItem->font();
296 QColor color = textItem->defaultTextColor();
297 fontCombo->setCurrentFont(font);
298 fontSizeCombo->setEditText(QString().setNum(font.pointSize()));
299 boldAction->setChecked(font.weight() == QFont::Bold);
300 italicAction->setChecked(font.italic());
301 underlineAction->setChecked(font.underline());
302}
303//! [19]
304
305//! [20]
306void MainWindow::about()
307{
308 QMessageBox::about(this, tr("About Diagram Scene"),
309 tr("The <b>Diagram Scene</b> example shows "
310 "use of the graphics framework."));
311}
312//! [20]
313
314//! [21]
315void MainWindow::createToolBox()
316{
317 buttonGroup = new QButtonGroup;
318 buttonGroup->setExclusive(false);
319 connect(buttonGroup, SIGNAL(buttonClicked(int)),
320 this, SLOT(buttonGroupClicked(int)));
321 QGridLayout *layout = new QGridLayout;
322 layout->addWidget(createCellWidget(tr("Conditional"),
323 DiagramItem::Conditional), 0, 0);
324 layout->addWidget(createCellWidget(tr("Process"),
325 DiagramItem::Step),0, 1);
326 layout->addWidget(createCellWidget(tr("Input/Output"),
327 DiagramItem::Io), 1, 0);
328//! [21]
329
330 QToolButton *textButton = new QToolButton;
331 textButton->setCheckable(true);
332 buttonGroup->addButton(textButton, InsertTextButton);
333 textButton->setIcon(QIcon(QPixmap(":/images/textpointer.png")
334 .scaled(30, 30)));
335 textButton->setIconSize(QSize(50, 50));
336 QGridLayout *textLayout = new QGridLayout;
337 textLayout->addWidget(textButton, 0, 0, Qt::AlignHCenter);
338 textLayout->addWidget(new QLabel(tr("Text")), 1, 0, Qt::AlignCenter);
339 QWidget *textWidget = new QWidget;
340 textWidget->setLayout(textLayout);
341 layout->addWidget(textWidget, 1, 1);
342
343 layout->setRowStretch(3, 10);
344 layout->setColumnStretch(2, 10);
345
346 QWidget *itemWidget = new QWidget;
347 itemWidget->setLayout(layout);
348
349 backgroundButtonGroup = new QButtonGroup;
350 connect(backgroundButtonGroup, SIGNAL(buttonClicked(QAbstractButton*)),
351 this, SLOT(backgroundButtonGroupClicked(QAbstractButton*)));
352
353 QGridLayout *backgroundLayout = new QGridLayout;
354 backgroundLayout->addWidget(createBackgroundCellWidget(tr("Blue Grid"),
355 ":/images/background1.png"), 0, 0);
356 backgroundLayout->addWidget(createBackgroundCellWidget(tr("White Grid"),
357 ":/images/background2.png"), 0, 1);
358 backgroundLayout->addWidget(createBackgroundCellWidget(tr("Gray Grid"),
359 ":/images/background3.png"), 1, 0);
360 backgroundLayout->addWidget(createBackgroundCellWidget(tr("No Grid"),
361 ":/images/background4.png"), 1, 1);
362
363 backgroundLayout->setRowStretch(2, 10);
364 backgroundLayout->setColumnStretch(2, 10);
365
366 QWidget *backgroundWidget = new QWidget;
367 backgroundWidget->setLayout(backgroundLayout);
368
369
370//! [22]
371 toolBox = new QToolBox;
372 toolBox->setSizePolicy(QSizePolicy(QSizePolicy::Maximum, QSizePolicy::Ignored));
373 toolBox->setMinimumWidth(itemWidget->sizeHint().width());
374 toolBox->addItem(itemWidget, tr("Basic Flowchart Shapes"));
375 toolBox->addItem(backgroundWidget, tr("Backgrounds"));
376}
377//! [22]
378
379//! [23]
380void MainWindow::createActions()
381{
382 toFrontAction = new QAction(QIcon(":/images/bringtofront.png"),
383 tr("Bring to &Front"), this);
384 toFrontAction->setShortcut(tr("Ctrl+F"));
385 toFrontAction->setStatusTip(tr("Bring item to front"));
386 connect(toFrontAction, SIGNAL(triggered()),
387 this, SLOT(bringToFront()));
388//! [23]
389
390 sendBackAction = new QAction(QIcon(":/images/sendtoback.png"),
391 tr("Send to &Back"), this);
392 sendBackAction->setShortcut(tr("Ctrl+B"));
393 sendBackAction->setStatusTip(tr("Send item to back"));
394 connect(sendBackAction, SIGNAL(triggered()),
395 this, SLOT(sendToBack()));
396
397 deleteAction = new QAction(QIcon(":/images/delete.png"),
398 tr("&Delete"), this);
399 deleteAction->setShortcut(tr("Delete"));
400 deleteAction->setStatusTip(tr("Delete item from diagram"));
401 connect(deleteAction, SIGNAL(triggered()),
402 this, SLOT(deleteItem()));
403
404 exitAction = new QAction(tr("E&xit"), this);
405 exitAction->setShortcuts(QKeySequence::Quit);
406 exitAction->setStatusTip(tr("Quit Scenediagram example"));
407 connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));
408
409 boldAction = new QAction(tr("Bold"), this);
410 boldAction->setCheckable(true);
411 QPixmap pixmap(":/images/bold.png");
412 boldAction->setIcon(QIcon(pixmap));
413 boldAction->setShortcut(tr("Ctrl+B"));
414 connect(boldAction, SIGNAL(triggered()),
415 this, SLOT(handleFontChange()));
416
417 italicAction = new QAction(QIcon(":/images/italic.png"),
418 tr("Italic"), this);
419 italicAction->setCheckable(true);
420 italicAction->setShortcut(tr("Ctrl+I"));
421 connect(italicAction, SIGNAL(triggered()),
422 this, SLOT(handleFontChange()));
423
424 underlineAction = new QAction(QIcon(":/images/underline.png"),
425 tr("Underline"), this);
426 underlineAction->setCheckable(true);
427 underlineAction->setShortcut(tr("Ctrl+U"));
428 connect(underlineAction, SIGNAL(triggered()),
429 this, SLOT(handleFontChange()));
430
431 aboutAction = new QAction(tr("A&bout"), this);
432 aboutAction->setShortcut(tr("Ctrl+B"));
433 connect(aboutAction, SIGNAL(triggered()),
434 this, SLOT(about()));
435}
436
437//! [24]
438void MainWindow::createMenus()
439{
440 fileMenu = menuBar()->addMenu(tr("&File"));
441 fileMenu->addAction(exitAction);
442
443 itemMenu = menuBar()->addMenu(tr("&Item"));
444 itemMenu->addAction(deleteAction);
445 itemMenu->addSeparator();
446 itemMenu->addAction(toFrontAction);
447 itemMenu->addAction(sendBackAction);
448
449 aboutMenu = menuBar()->addMenu(tr("&Help"));
450 aboutMenu->addAction(aboutAction);
451}
452//! [24]
453
454//! [25]
455void MainWindow::createToolbars()
456{
457//! [25]
458 editToolBar = addToolBar(tr("Edit"));
459 editToolBar->addAction(deleteAction);
460 editToolBar->addAction(toFrontAction);
461 editToolBar->addAction(sendBackAction);
462
463 fontCombo = new QFontComboBox();
464 fontSizeCombo = new QComboBox();
465 connect(fontCombo, SIGNAL(currentFontChanged(QFont)),
466 this, SLOT(currentFontChanged(QFont)));
467
468 fontSizeCombo = new QComboBox;
469 fontSizeCombo->setEditable(true);
470 for (int i = 8; i < 30; i = i + 2)
471 fontSizeCombo->addItem(QString().setNum(i));
472 QIntValidator *validator = new QIntValidator(2, 64, this);
473 fontSizeCombo->setValidator(validator);
474 connect(fontSizeCombo, SIGNAL(currentIndexChanged(QString)),
475 this, SLOT(fontSizeChanged(QString)));
476
477 fontColorToolButton = new QToolButton;
478 fontColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
479 fontColorToolButton->setMenu(createColorMenu(SLOT(textColorChanged()),
480 Qt::black));
481 textAction = fontColorToolButton->menu()->defaultAction();
482 fontColorToolButton->setIcon(createColorToolButtonIcon(
483 ":/images/textpointer.png", Qt::black));
484 fontColorToolButton->setAutoFillBackground(true);
485 connect(fontColorToolButton, SIGNAL(clicked()),
486 this, SLOT(textButtonTriggered()));
487
488//! [26]
489 fillColorToolButton = new QToolButton;
490 fillColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
491 fillColorToolButton->setMenu(createColorMenu(SLOT(itemColorChanged()),
492 Qt::white));
493 fillAction = fillColorToolButton->menu()->defaultAction();
494 fillColorToolButton->setIcon(createColorToolButtonIcon(
495 ":/images/floodfill.png", Qt::white));
496 connect(fillColorToolButton, SIGNAL(clicked()),
497 this, SLOT(fillButtonTriggered()));
498//! [26]
499
500 lineColorToolButton = new QToolButton;
501 lineColorToolButton->setPopupMode(QToolButton::MenuButtonPopup);
502 lineColorToolButton->setMenu(createColorMenu(SLOT(lineColorChanged()),
503 Qt::black));
504 lineAction = lineColorToolButton->menu()->defaultAction();
505 lineColorToolButton->setIcon(createColorToolButtonIcon(
506 ":/images/linecolor.png", Qt::black));
507 connect(lineColorToolButton, SIGNAL(clicked()),
508 this, SLOT(lineButtonTriggered()));
509
510 textToolBar = addToolBar(tr("Font"));
511 textToolBar->addWidget(fontCombo);
512 textToolBar->addWidget(fontSizeCombo);
513 textToolBar->addAction(boldAction);
514 textToolBar->addAction(italicAction);
515 textToolBar->addAction(underlineAction);
516
517 colorToolBar = addToolBar(tr("Color"));
518 colorToolBar->addWidget(fontColorToolButton);
519 colorToolBar->addWidget(fillColorToolButton);
520 colorToolBar->addWidget(lineColorToolButton);
521
522 QToolButton *pointerButton = new QToolButton;
523 pointerButton->setCheckable(true);
524 pointerButton->setChecked(true);
525 pointerButton->setIcon(QIcon(":/images/pointer.png"));
526 QToolButton *linePointerButton = new QToolButton;
527 linePointerButton->setCheckable(true);
528 linePointerButton->setIcon(QIcon(":/images/linepointer.png"));
529
530 pointerTypeGroup = new QButtonGroup;
531 pointerTypeGroup->addButton(pointerButton, int(DiagramScene::MoveItem));
532 pointerTypeGroup->addButton(linePointerButton,
533 int(DiagramScene::InsertLine));
534 connect(pointerTypeGroup, SIGNAL(buttonClicked(int)),
535 this, SLOT(pointerGroupClicked(int)));
536
537 sceneScaleCombo = new QComboBox;
538 QStringList scales;
539 scales << tr("50%") << tr("75%") << tr("100%") << tr("125%") << tr("150%");
540 sceneScaleCombo->addItems(scales);
541 sceneScaleCombo->setCurrentIndex(2);
542 connect(sceneScaleCombo, SIGNAL(currentIndexChanged(QString)),
543 this, SLOT(sceneScaleChanged(QString)));
544
545 pointerToolbar = addToolBar(tr("Pointer type"));
546 pointerToolbar->addWidget(pointerButton);
547 pointerToolbar->addWidget(linePointerButton);
548 pointerToolbar->addWidget(sceneScaleCombo);
549//! [27]
550}
551//! [27]
552
553//! [28]
554QWidget *MainWindow::createBackgroundCellWidget(const QString &text,
555 const QString &image)
556{
557 QToolButton *button = new QToolButton;
558 button->setText(text);
559 button->setIcon(QIcon(image));
560 button->setIconSize(QSize(50, 50));
561 button->setCheckable(true);
562 backgroundButtonGroup->addButton(button);
563
564 QGridLayout *layout = new QGridLayout;
565 layout->addWidget(button, 0, 0, Qt::AlignHCenter);
566 layout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter);
567
568 QWidget *widget = new QWidget;
569 widget->setLayout(layout);
570
571 return widget;
572}
573//! [28]
574
575//! [29]
576QWidget *MainWindow::createCellWidget(const QString &text,
577 DiagramItem::DiagramType type)
578{
579
580 DiagramItem item(type, itemMenu);
581 QIcon icon(item.image());
582
583 QToolButton *button = new QToolButton;
584 button->setIcon(icon);
585 button->setIconSize(QSize(50, 50));
586 button->setCheckable(true);
587 buttonGroup->addButton(button, int(type));
588
589 QGridLayout *layout = new QGridLayout;
590 layout->addWidget(button, 0, 0, Qt::AlignHCenter);
591 layout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter);
592
593 QWidget *widget = new QWidget;
594 widget->setLayout(layout);
595
596 return widget;
597}
598//! [29]
599
600//! [30]
601QMenu *MainWindow::createColorMenu(const char *slot, QColor defaultColor)
602{
603 QList<QColor> colors;
604 colors << Qt::black << Qt::white << Qt::red << Qt::blue << Qt::yellow;
605 QStringList names;
606 names << tr("black") << tr("white") << tr("red") << tr("blue")
607 << tr("yellow");
608
609 QMenu *colorMenu = new QMenu;
610 for (int i = 0; i < colors.count(); ++i) {
611 QAction *action = new QAction(names.at(i), this);
612 action->setData(colors.at(i));
613 action->setIcon(createColorIcon(colors.at(i)));
614 connect(action, SIGNAL(triggered()),
615 this, slot);
616 colorMenu->addAction(action);
617 if (colors.at(i) == defaultColor) {
618 colorMenu->setDefaultAction(action);
619 }
620 }
621 return colorMenu;
622}
623//! [30]
624
625//! [31]
626QIcon MainWindow::createColorToolButtonIcon(const QString &imageFile,
627 QColor color)
628{
629 QPixmap pixmap(50, 80);
630 pixmap.fill(Qt::transparent);
631 QPainter painter(&pixmap);
632 QPixmap image(imageFile);
633 QRect target(0, 0, 50, 60);
634 QRect source(0, 0, 42, 42);
635 painter.fillRect(QRect(0, 60, 50, 80), color);
636 painter.drawPixmap(target, image, source);
637
638 return QIcon(pixmap);
639}
640//! [31]
641
642//! [32]
643QIcon MainWindow::createColorIcon(QColor color)
644{
645 QPixmap pixmap(20, 20);
646 QPainter painter(&pixmap);
647 painter.setPen(Qt::NoPen);
648 painter.fillRect(QRect(0, 0, 20, 20), color);
649
650 return QIcon(pixmap);
651}
652//! [32]
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