Qt-DrawingTool拖拉画图工具

/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. 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IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "arrow.h" #include "diagramitem.h" #include "diagramscene.h" #include "diagramtextitem.h" #include "mainwindow.h" #include <QtWidgets> const int InsertTextButton = 10; MainWindow::MainWindow() { float f = 4334261027; auto f1 = f; 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(arrowInserted()), this, SLOT(backupUndostack())); connect(scene, SIGNAL(textChanged()), this, SLOT(backupUndostack())); connect(scene, SIGNAL(itemSelected(QGraphicsItem*)), this, SLOT(itemSelected(QGraphicsItem*))); connect(scene, SIGNAL(scaleChanging(int)), this, SLOT(sceneScaleZooming(int))); createToolbars(); QHBoxLayout *layout = new QHBoxLayout; layout->addWidget(toolBox); view = new DiagramView(scene); layout->addWidget(view); connect(view, SIGNAL(needsUndoBackup()), this, SLOT(backupUndostack())); QWidget *widget = new QWidget; widget->setLayout(layout); setCentralWidget(widget); setWindowTitle(tr("Diagramscene")); setUnifiedTitleAndToolBarOnMac(true); undoStack.backup(QList<QGraphicsItem*>()); } 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(":/images/background1.png")); else if (text == tr("White Grid")) scene->setBackgroundBrush(QPixmap(":/images/background2.png")); else if (text == tr("Gray Grid")) scene->setBackgroundBrush(QPixmap(":/images/background3.png")); else scene->setBackgroundBrush(QPixmap(":/images/background4.png")); scene->update(); view->update(); } void MainWindow::buttonGroupClicked(int id) { QList<QAbstractButton *> buttons = buttonGroup->buttons(); QAbstractButton* clickedButton = buttonGroup->button(id); // set other button unchecked foreach (QAbstractButton *button, buttons) { if (clickedButton != button) button->setChecked(false); } // simply set objButton unchecked if already checked if (!clickedButton->isChecked()) { scene->setMode(DiagramScene::Mode(pointerTypeGroup->checkedId())); return; } if (id == InsertTextButton) { scene->setMode(DiagramScene::InsertText); } else { scene->setItemType(DiagramItem::DiagramType(id)); scene->setMode(DiagramScene::InsertItem); } } void MainWindow::copyItem() { foreach(QGraphicsItem* p, pasteBoard) { delete p; } pasteBoard = cloneItems(scene->selectedItems()); qDebug() << pasteBoard.size(); } void MainWindow::pasteItem() { QList<QGraphicsItem*> pasteBoardCopy(cloneItems(pasteBoard)); foreach(QGraphicsItem* p, scene->items()) p->setSelected(false); foreach(QGraphicsItem* item, pasteBoard) { if (item->type() != Arrow::Type) { item->setPos(item->scenePos() + QPointF(20, 20)); item->setZValue(item->zValue() + 0.1); // raise a little bit } scene->addItem(item); item->setSelected(true); } pasteBoard.swap(pasteBoardCopy); if (!scene->selectedItems().empty()) undoStack.backup(cloneItems(scene->items())); } void MainWindow::cutItem() { copyItem(); deleteItem(); } void MainWindow::deleteItem() { bool needsBackup = !scene->selectedItems().empty(); scene->deleteItems(scene->selectedItems()); if (needsBackup) undoStack.backup(cloneItems(scene->items())); } void MainWindow::undo() { if (undoStack.isEmpty()) return; // sweep away all items scene->deleteItems(scene->items()); QList<QGraphicsItem*> undoneItems = cloneItems(undoStack.undo()); foreach(QGraphicsItem* item, undoneItems) { qDebug() << item << "--------- add item"; scene->addItem(item); } // update arrows foreach(QGraphicsItem* item, undoneItems) { if (item->type() == Arrow::Type) qgraphicsitem_cast<Arrow*>(item)->updatePosition(); } } void MainWindow::redo() { if (undoStack.isFull()) return; scene->deleteItems(scene->items()); QList<QGraphicsItem*> redoneItems = cloneItems(undoStack.redo()); foreach(QGraphicsItem* item, redoneItems) { scene->addItem(item); } // update arrows foreach(QGraphicsItem* item, redoneItems) { if (item->type() == Arrow::Type) qgraphicsitem_cast<Arrow*>(item)->updatePosition(); } } void MainWindow::groupItems() { QGraphicsItemGroup* group = scene->createItemGroup(scene->selectedItems()); group->setFlag(QGraphicsItem::ItemIsMovable, true); group->setFlag(QGraphicsItem::ItemIsSelectable, true); group->setFlag(QGraphicsItem::ItemSendsGeometryChanges, true)