基于C++的qt流程图设计

#include "arrow.h" #include "diagramitem.h" #include "diagramscene.h" #include "diagramtextitem.h" #include "mainwindow.h" #include <QtWidgets> const int InsertTextButton = 10; MainWindow::MainWindow() { createActions(); createToolBox(); createMenus(); scene = new DiagramScene(itemMenu, this); scene->setSceneRect(QRectF(0, 0, 5000, 5000)); connect(scene, SIGNAL(itemInserted(DiagramItem*)), this, SLOT(itemInserted(DiagramItem*))); connect(scene, SIGNAL(textInserted(QGraphicsTextItem*)), this, SLOT(textInserted(QGraphicsTextItem*))); connect(scene, SIGNAL(itemSelected(QGraphicsItem*)), this, SLOT(itemSelected(QGraphicsItem*))); createToolbars(); QHBoxLayout *layout = new QHBoxLayout; layout->addWidget(toolBox); view = new QGraphicsView(scene); layout->addWidget(view); QWidget *widget = new QWidget; widget->setLayout(layout); setCentralWidget(widget); setWindowTitle(tr("流程图设计")); setUnifiedTitleAndToolBarOnMac(true); } void MainWindow::backgroundButtonGroupClicked(QAbstractButton *button) { QList<QAbstractButton *> buttons = backgroundButtonGroup->buttons(); foreach (QAbstractButton *myButton, buttons) { if (myButton != button) button->setChecked(false); } QString text = button->text(); if (text == tr("Blue Grid")) scene->setBackgroundBrush(QPixmap(":/img/background1.png")); else if (text == tr("White Grid")) scene->setBackgroundBrush(QPixmap(":/img/background2.png")); else if (text == tr("Gray Grid")) scene->setBackgroundBrush(QPixmap(":/img/background3.png")); else scene->setBackgroundBrush(QPixmap(":/img/background4.png")); scene->update(); view->update(); } void MainWindow::buttonGroupClicked(int id) { QList<QAbstractButton *> buttons = buttonGroup->buttons(); foreach (QAbstractButton *button, buttons) { if (buttonGroup->button(id) != button) button->setChecked(false); } if (id == InsertTextButton) { scene->setMode(DiagramScene::InsertText); } else { scene->setItemType(DiagramItem::DiagramType(id)); scene->setMode(DiagramScene::InsertItem); } } void MainWindow::deleteItem() { foreach (QGraphicsItem *item, scene->selectedItems()) { if (item->type() == Arrow::Type) { scene->removeItem(item); Arrow *arrow = qgraphicsitem_cast<Arrow *>(item); arrow->startItem()->removeArrow(arrow); arrow->endItem()->removeArrow(arrow); delete item; } } foreach (QGraphicsItem *item, scene->selectedItems()) { if (item->type() == DiagramItem::Type) qgraphicsitem_cast<DiagramItem *>(item)->removeArrows(); scene->removeItem(item); delete item; } } void MainWindow::pointerGroupClicked(int) { scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId())); } void MainWindow::bringToFront() { if (scene->selectedItems().isEmpty()) return; QGraphicsItem *selectedItem = scene->selectedItems().first(); QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems(); qreal zValue = 0; foreach (QGraphicsItem *item, overlapItems) { if (item->zValue() >= zValue && item->type() == DiagramItem::Type) zValue = item->zValue() + 0.1; } selectedItem->setZValue(zValue); } void MainWindow::sendToBack() { if (scene->selectedItems().isEmpty()) return; QGraphicsItem *selectedItem = scene->selectedItems().first(); QList<QGraphicsItem *> overlapItems = selectedItem->collidingItems(); qreal zValue = 0; foreach (QGraphicsItem *item, overlapItems) { if (item->zValue() <= zValue && item->type() == DiagramItem::Type) zValue = item->zValue() - 0.1; } selectedItem->setZValue(zValue); } void MainWindow::itemInserted(DiagramItem *item) { pointerTypeGroup->button(int(DiagramScene::MoveItem))->setChecked(true); scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId())); buttonGroup->button(int(item->diagramType()))->setChecked(false); } void MainWindow::textInserted(QGraphicsTextItem *) { buttonGroup->button(InsertTextButton)->setChecked(false); scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId())); } void MainWindow::currentFontChanged(const QFont &) { handleFontChange(); } void MainWindow::fontSizeChanged(const QString &) { handleFontChange(); } void MainWindow::sceneScaleChanged(const QString &scale) { double newScale = scale.left(scale.indexOf(tr("%"))).toDouble() / 100.0; QMatrix oldMatrix = view->matrix(); view->resetMatrix(); view->translate(oldMatrix.dx(), oldMatrix.dy()); view->scale(newScale, newScale); } void MainWindow::textColorChanged() { textAction = qobject_cast<QAction *>(sender()); fontColorToolButton->setIcon(createColorToolButtonIcon( ":/img/textpointer.png", qvariant_cast<QColor>(textAction->data()))); textButtonTriggered(); } void MainWindow::itemColorChanged() { fillAction = qobject_cast<QAction *>(sender()); fillColorToolButton->setIcon(createColorToolButtonIcon( ":/img/floodfill.png", qvariant_cast<QColor>(fillAction->data()))); fillButtonTriggered(); } void MainWindow::lineColorChanged() { lineAction = qobject_cast<QAction *>(sender()); lineColorToolButton->setIcon(createColorToolButtonIcon( ":/img/linecolor.png", qvariant_cast<QColor>(lineAction->data()))); lineButtonTriggered(); } void MainWindow::textButtonTriggered() { scene->setTextColor(qvariant_cast<QColor>(textAction->data())); } void MainWindow::fillButtonTriggered() { scene->setItemColor(qvariant_cast<QColor>(fillAction->data())); } void MainWindow::lineButtonTriggered() { scene->setLineColor(qvariant_cast<QColor>(lineAction->data())); } void MainWindow::handleFontChange() { QFont font = fontCombo->currentFont(); font.setPointSize(fontSizeCombo->currentText().toInt()); font.setWeight(boldAction->isChecked() ? QFont::Bold : QFont::Normal); font.setItalic(italicAction->isChecked()); font.setUnderline(underlineAction->isChecked()); scene->setFont(font); } void MainWindow::itemSelected(QGraphicsItem *item) { DiagramTextItem *textItem = qgraphicsitem_cast<DiagramTextItem *>(item); QFont font = textItem->font(); fontCombo->setCurrentFont(font); fontSizeCombo->setEditText(QString().setNum(font.pointSize())); boldAction->setChecked(font.weight() == QFont::Bold); italicAction->setChecked(font.italic()); underlineAction->setChecked(font.underline()); } void MainWindow::about() { QMessageBox::about(this, tr("关于这个流程图软件"), tr("这个流程图软件全程根据qt例程graphicsscene例程" "只有一些简单的修改.")); } void MainWindow::createToolBox() { buttonGroup = new QButtonGroup(this); buttonGroup->setExclusive(false); connect(buttonGroup, SIGNAL(buttonClicked(int)), this, SLOT(buttonGroupClicked(int))); QGridLayout *layout = new QGridLayout; layout->addWidget(createCellWidget(tr("Conditional"), DiagramItem::Conditional), 0, 0); layout->addWidget(createCellWidget(tr("Process"), DiagramItem::Step),0, 1); layout->addWidget(createCellWidget(tr("Input/Output"), DiagramItem::Io), 1, 0); QToolButton *textButton = new QToolButton; textButton->setCheckable(true); buttonGroup->addButton(textButton, InsertTextButton); textButton->setIcon(QIcon(QPixmap(":/img/textpointer.png"))); textButton->setIconSize(QSize(50, 50)); QGridLayout *textLayout = new QGridLayou