Qt实现流程示意图

#include <QtWidgets> #include "flowchartdialog.h" #include "diagramscene.h" FlowChartDialog::FlowChartDialog(QWidget *parent) : QDialog(parent) { this->setWindowFlags(Qt::Window); initFlowChartDialog(); } FlowChartDialog::~FlowChartDialog() { } void FlowChartDialog::initFlowChartDialog() { //创建工具栏 createToolBar(); //创建工具箱 createToolBox(); //创建视图 m_view = new QGraphicsView(this); m_scene = new DiagramScene(0, 0, 2000, 1000); connect(m_scene, SIGNAL(itemInserted(DiagramItem*)), this, SLOT(onSceneItemInserted(DiagramItem*))); m_view->setScene(m_scene); m_view->setDragMode(QGraphicsView::RubberBandDrag); QHBoxLayout *hLayout = new QHBoxLayout(); hLayout->addWidget(m_toolBox); hLayout->addWidget(m_view); QVBoxLayout *vLayout = new QVBoxLayout(); vLayout->addWidget(m_toolBar); vLayout->addLayout(hLayout); this->setLayout(vLayout); } void FlowChartDialog::createToolBar() { m_toolBar = new QToolBar(this); m_fontBox = new QFontComboBox(this); connect(m_fontBox, SIGNAL(currentIndexChanged(QString)), this, SLOT(onFontFamilyChange(QString))); m_toolBar->addWidget(m_fontBox); m_fontSizeBox = new QComboBox(this); m_toolBar->addWidget(m_fontSizeBox); QFontDatabase fontDb; foreach (int size, fontDb.standardSizes()) { m_fontSizeBox->addItem(QString::number(size)); } connect(m_fontSizeBox, SIGNAL(currentIndexChanged(QString)), this, SLOT(onFontSizeChange(QString))); m_actBold = new QAction("Bold", this); m_actBold->setIcon(QIcon(":/images/bold.png")); m_actBold->setCheckable(true); connect(m_actBold, SIGNAL(triggered(bool)), this, SLOT(onFontStyleChange())); m_toolBar->addAction(m_actBold); m_actItalic = new QAction("Italic", this); m_actItalic->setIcon(QIcon(":/images/italic.png")); m_actItalic->setCheckable(true); connect(m_actItalic, SIGNAL(triggered(bool)), this, SLOT(onFontStyleChange())); m_toolBar->addAction(m_actItalic); m_actUnderline = new QAction("Underline", this); m_actUnderline->setIcon(QIcon(":/images/underline.png")); m_actUnderline->setCheckable(true); connect(m_actUnderline, SIGNAL(triggered(bool)), this, SLOT(onFontStyleChange())); m_toolBar->addAction(m_actUnderline); m_toolBar->addSeparator(); m_actFontColor = new QAction("Font Color", this); m_actFontColor->setIcon(QIcon(":/images/fontcolor.png")); connect(m_actFontColor, SIGNAL(triggered(bool)), this, SLOT(onFontColor())); m_toolBar->addAction(m_actFontColor); m_actLineColor = new QAction("Line Color", this); m_actLineColor->setIcon(QIcon(":/images/linecolor.png")); connect(m_actLineColor, SIGNAL(triggered(bool)), this, SLOT(onLineColor())); m_toolBar->addAction(m_actLineColor); m_toolBar->addSeparator(); m_actPointer = new QAction("Pointer", this); m_actPointer->setIcon(QIcon(":/images/pointer.png")); m_actPointer->setCheckable(true); m_actPointer->setChecked(true); connect(m_actPointer, SIGNAL(triggered(bool)), this, SLOT(onPointer())); m_toolBar->addAction(m_actPointer); m_actLinePointer = new QAction("Line Pointer", this); m_actLinePointer->setIcon(QIcon(":/images/linepointer.png")); m_actLinePointer->setCheckable(true); connect(m_actLinePointer, SIGNAL(triggered(bool)), this, SLOT(onLinePointer())); m_toolBar->addAction(m_actLinePointer); } void FlowChartDialog::createToolBox() { m_toolBox = new QToolBox(); m_toolBox->setFixedWidth(210); m_toolBoxButtonGroup = new QButtonGroup(this); connect(m_toolBoxButtonGroup, SIGNAL(buttonClicked(int)), this, SLOT(onToolBoxButtonGroup(int))); QGridLayout *gLayout = new QGridLayout(); gLayout->addWidget(createCellWidget(tr("Conditional"), DiagramItem::Conditional), 0, 0); gLayout->addWidget(createCellWidget(tr("Process"), DiagramItem::Step),0, 1); gLayout->addWidget(createCellWidget(tr("Input/Output"), DiagramItem::Io), 1, 0); gLayout->addWidget(createCellWidget(tr("Start/End"), DiagramItem::StartEnd), 1, 1); gLayout->setRowStretch(2, 10); QWidget *widget = new QWidget(); widget->setLayout(gLayout); m_toolBox->addItem(widget, "Shapes"); } QWidget *FlowChartDialog::createCellWidget(const QString &text, DiagramItem::DiagramType type) { DiagramItem item(type); QIcon icon(item.getPixmap()); QToolButton *toolBtn = new QToolButton(); toolBtn->setIcon(icon); toolBtn->setIconSize(QSize(50, 50)); toolBtn->setCheckable(true); m_toolBoxButtonGroup->addButton(toolBtn, int(type)); QGridLayout *gLayout = new QGridLayout(); gLayout->addWidget(toolBtn, 0, 0, Qt::AlignHCenter); gLayout->addWidget(new QLabel(text), 1, 0, Qt::AlignCenter); QWidget *widget = new QWidget(); widget->setLayout(gLayout); return widget; } void FlowChartDialog::onFontFamilyChange(const QString &/*family*/) { onFontStyleChange(); } void FlowChartDialog::onFontSizeChange(const QString &/*fontSize*/) { onFontStyleChange(); } void FlowChartDialog::onFontStyleChange() { QFont font = m_fontBox->currentFont(); font.setPointSize(m_fontSizeBox->currentText().toInt()); font.setBold(m_actBold->isChecked() ? QFont::Bold : QFont::Normal); font.setItalic(m_actItalic->isChecked()); font.setUnderline(m_actUnderline->isChecked()); m_scene->setFont(font); } void FlowChartDialog::onFontColor() { } void FlowChartDialog::onLineColor() { } void FlowChartDialog::onPointer() { m_actPointer->setChecked(true); m_actLinePointer->setChecked(false); m_scene->setMode(DiagramScene::MoveItem); } void FlowChartDialog::onLinePointer() { m_actPointer->setChecked(false); m_actLinePointer->setChecked(true); m_scene->setMode(DiagramScene::InsertLine); } void FlowChartDialog::onToolBoxButtonGroup(int id) { QList<QAbstractButton*> buttons = m_toolBoxButtonGroup->buttons(); QAbstractButton *clickedButton = m_toolBoxButtonGroup->button(id); foreach (QAbstractButton *button, buttons) { if (clickedButton != button) { button->setChecked(false); } } m_scene->setMode(DiagramScene::InsertItem); m_scene->setItemType(DiagramItem::DiagramType(id)); } void FlowChartDialog::onSceneItemInserted(DiagramItem *item) { if (!item) return; m_toolBoxButtonGroup->button((int)item->getDiagramType())->setChecked(false); if (m_actPointer->isChecked()) { m_scene->setMode(DiagramScene::MoveItem); } else if (m_actLinePointer->isChecked()) { m_scene->setMode(DiagramScene::InsertLine); } }