Mercurial > projects > qtd
view examples/graphicsview/elasticnodes/graphwidget.d @ 383:bd7f485e3573
More debug fixes
author | Max Samukha <maxter@spambox.com> |
---|---|
date | Mon, 12 Jul 2010 22:50:58 +0300 |
parents | 12f60887ed15 |
children |
line wrap: on
line source
/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/ import std.math; import qt.gui.QLinearGradient, qt.gui.QGraphicsView, qt.gui.QGraphicsScene; import edge, node; class GraphWidget : QGraphicsView { public: this() { auto scene = new QGraphicsScene(this); scene.setItemIndexMethod(QGraphicsScene.NoIndex); scene.setSceneRect(-200, -200, 400, 400); setScene(scene); setCacheMode(CacheBackground); setViewportUpdateMode(BoundingRectViewportUpdate); setRenderHint(QPainter.Antialiasing); setTransformationAnchor(AnchorUnderMouse); setResizeAnchor(AnchorViewCenter); Node node1 = new Node(this); Node node2 = new Node(this); Node node3 = new Node(this); Node node4 = new Node(this); centerNode = new Node(this); Node node6 = new Node(this); Node node7 = new Node(this); Node node8 = new Node(this); Node node9 = new Node(this); scene.addItem(node1); scene.addItem(node2); scene.addItem(node3); scene.addItem(node4); scene.addItem(centerNode); scene.addItem(node6); scene.addItem(node7); scene.addItem(node8); scene.addItem(node9); scene.addItem(new Edge(node1, node2)); scene.addItem(new Edge(node2, node3)); scene.addItem(new Edge(node2, centerNode)); scene.addItem(new Edge(node3, node6)); scene.addItem(new Edge(node4, node1)); scene.addItem(new Edge(node4, centerNode)); scene.addItem(new Edge(centerNode, node6)); scene.addItem(new Edge(centerNode, node8)); scene.addItem(new Edge(node6, node9)); scene.addItem(new Edge(node7, node4)); scene.addItem(new Edge(node8, node7)); scene.addItem(new Edge(node9, node8)); node1.setPos(-50, -50); node2.setPos(0, -50); node3.setPos(50, -50); node4.setPos(-50, 0); centerNode.setPos(0, 0); node6.setPos(50, 0); node7.setPos(-50, 50); node8.setPos(0, 50); node9.setPos(50, 50); scale(0.8, 0.8); setMinimumSize(400, 400); setWindowTitle(tr("Elastic Nodes")); } void itemMoved() { if (!timerId) timerId = startTimer(1000 / 25); } protected: void keyPressEvent(QKeyEvent event) { switch (event.key()) { case Qt.Key_Up: centerNode.moveBy(0, -20); break; case Qt.Key_Down: centerNode.moveBy(0, 20); break; case Qt.Key_Left: centerNode.moveBy(-20, 0); break; case Qt.Key_Right: centerNode.moveBy(20, 0); break; case Qt.Key_Plus: scaleView(1.2); break; case Qt.Key_Minus: scaleView(1 / 1.2); break; case Qt.Key_Space: case Qt.Key_Enter: foreach (IQGraphicsItem item; scene().items()) { if (cast(Node)item) item.setPos(-150 + qrand() % 300, -150 + qrand() % 300); } break; default: super.keyPressEvent(event); } } void timerEvent(QTimerEvent event) { Node[] nodes; foreach (IQGraphicsItem item; scene().items()) { if (auto node = cast(Node)item) nodes ~= node; } foreach (Node node; nodes) node.calculateForces(); bool itemsMoved = false; foreach (Node node; nodes) { if (node.advance()) itemsMoved = true; } if (!itemsMoved) { killTimer(timerId); timerId = 0; } } void wheelEvent(QWheelEvent event) { scaleView(pow(cast(float)2, cast(float)(-event.delta() / 240.0))); } void drawBackground(QPainter painter, const QRectF rect) { // Shadow QRectF sceneRect = this.sceneRect(); auto rightShadow = QRectF(sceneRect.right(), sceneRect.top() + 5, 5, sceneRect.height()); auto bottomShadow = QRectF(sceneRect.left() + 5, sceneRect.bottom(), sceneRect.width(), 5); if (rightShadow.intersects(rect) || rightShadow.contains(rect)) painter.fillRect(rightShadow, Qt.darkGray); if (bottomShadow.intersects(rect) || bottomShadow.contains(rect)) painter.fillRect(bottomShadow, Qt.darkGray); // Fill auto gradient = new QLinearGradient(sceneRect.topLeft(), sceneRect.bottomRight()); gradient.setColorAt(0, new QColor(Qt.white)); gradient.setColorAt(1, new QColor(Qt.lightGray)); painter.fillRect(rect.intersected(sceneRect), new QBrush(gradient)); painter.setBrush(Qt.NoBrush); painter.drawRect(sceneRect); // Text auto textRect = QRectF(sceneRect.left() + 4, sceneRect.top() + 4, sceneRect.width() - 4, sceneRect.height() - 4); string message = tr("Click and drag the nodes around, and zoom with the mouse " "wheel or the '+' and '-' keys"); QFont font = painter.font(); font.setBold(true); font.setPointSize(14); painter.setFont(font); painter.setPen(new QColor(Qt.lightGray)); painter.drawText(textRect.translated(2, 2), message); painter.setPen(new QColor(Qt.black)); painter.drawText(textRect, message); } void scaleView(qreal scaleFactor) { qreal factor = matrix().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width(); if (factor < 0.07 || factor > 100) return; scale(scaleFactor, scaleFactor); } private: int timerId; Node centerNode; mixin Q_OBJECT; };