#!/usr/bin/env python """*************************************************************************** ** ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 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 GNU ** General Public Licensing requirements will be met: ** http://www.trolltech.com/products/qt/opensource.html ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://www.trolltech.com/products/qt/licensing.html or contact the ** sales department at sales@trolltech.com. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ***************************************************************************""" import sys from PyQt4 import QtCore, QtGui NoTransformation, Translate, Rotate, Scale = range(4) class RenderArea(QtGui.QWidget): def __init__(self, parent=None): QtGui.QWidget.__init__(self, parent) newFont = self.font() newFont.setPixelSize(12) self.setFont(newFont) fontMetrics = QtGui.QFontMetrics(newFont) self.xBoundingRect = fontMetrics.boundingRect(self.tr("x")) self.yBoundingRect = fontMetrics.boundingRect(self.tr("y")) self.shape = QtGui.QPainterPath() self.operations = [] def setOperations(self, operations): self.operations = operations self.update() def setShape(self, shape): self.shape = shape self.update() def minimumSizeHint(self): return QtCore.QSize(182, 182) def sizeHint(self): return QtCore.QSize(232, 182) def paintEvent(self, event): painter = QtGui.QPainter() painter.begin(self) painter.setRenderHint(QtGui.QPainter.Antialiasing) painter.fillRect(event.rect(), QtGui.QBrush(QtCore.Qt.white)) painter.translate(66, 66) painter.save() self.transformPainter(painter) self.drawShape(painter) painter.restore() self.drawOutline(painter) painter.save() self.transformPainter(painter) self.drawCoordinates(painter) painter.restore() painter.end() def drawCoordinates(self, painter): painter.setPen(QtCore.Qt.red) painter.drawLine(0, 0, 50, 0) painter.drawLine(48, -2, 50, 0) painter.drawLine(48, 2, 50, 0) painter.drawText(60 - self.xBoundingRect.width() / 2, 0 + self.xBoundingRect.height() / 2, self.tr("x")) painter.drawLine(0, 0, 0, 50) painter.drawLine(-2, 48, 0, 50) painter.drawLine(2, 48, 0, 50) painter.drawText(0 - self.yBoundingRect.width() / 2, 60 + self.yBoundingRect.height() / 2, self.tr("y")) def drawOutline(self, painter): painter.setPen(QtCore.Qt.darkGreen) painter.setPen(QtCore.Qt.DashLine) painter.setBrush(QtCore.Qt.NoBrush) painter.drawRect(0, 0, 100, 100) def drawShape(self, painter): painter.fillPath(self.shape, QtCore.Qt.blue) def transformPainter(self, painter): for operation in self.operations: if operation == Translate: painter.translate(50, 50) elif operation == Scale: painter.scale(0.75, 0.75) elif operation == Rotate: painter.rotate(60) class Window(QtGui.QWidget): operationTable = (NoTransformation, Rotate, Scale, Translate) NumTransformedAreas = 3 def __init__(self, parent=None): QtGui.QWidget.__init__(self, parent) self.originalRenderArea = RenderArea() self.shapeComboBox = QtGui.QComboBox() self.shapeComboBox.addItem(self.tr("Clock")) self.shapeComboBox.addItem(self.tr("House")) self.shapeComboBox.addItem(self.tr("Text")) self.shapeComboBox.addItem(self.tr("Truck")) layout = QtGui.QGridLayout() layout.addWidget(self.originalRenderArea, 0, 0) layout.addWidget(self.shapeComboBox, 1, 0) self.transformedRenderAreas = range(Window.NumTransformedAreas) self.operationComboBoxes = range(Window.NumTransformedAreas) for i in range(Window.NumTransformedAreas): self.transformedRenderAreas[i] = RenderArea() self.operationComboBoxes[i] = QtGui.QComboBox() self.operationComboBoxes[i].addItem(self.tr("No transformation")) self.operationComboBoxes[i].addItem(self.tr("Rotate by 60\xB0")) self.operationComboBoxes[i].addItem(self.tr("Scale to 75%")) self.operationComboBoxes[i].addItem(self.tr("Translate by (50, 50)")) self.connect(self.operationComboBoxes[i], QtCore.SIGNAL("activated(int)"), self.operationChanged) layout.addWidget(self.transformedRenderAreas[i], 0, i + 1) layout.addWidget(self.operationComboBoxes[i], 1, i + 1) self.setLayout(layout) self.setupShapes() self.shapeSelected(0) self.setWindowTitle(self.tr("Transformations")) def setupShapes(self): truck = QtGui.QPainterPath() truck.setFillRule(QtCore.Qt.WindingFill) truck.moveTo(0.0, 87.0) truck.lineTo(0.0, 60.0) truck.lineTo(10.0, 60.0) truck.lineTo(35.0, 35.0) truck.lineTo(100.0, 35.0) truck.lineTo(100.0, 87.0) truck.lineTo(0.0, 87.0) truck.moveTo(17.0, 60.0) truck.lineTo(55.0, 60.0) truck.lineTo(55.0, 40.0) truck.lineTo(37.0, 40.0) truck.lineTo(17.0, 60.0) truck.addEllipse(17.0, 75.0, 25.0, 25.0) truck.addEllipse(63.0, 75.0, 25.0, 25.0) clock = QtGui.QPainterPath() clock.addEllipse(-50.0, -50.0, 100.0, 100.0) clock.addEllipse(-48.0, -48.0, 96.0, 96.0) clock.moveTo(0.0, 0.0) clock.lineTo(-2.0, -2.0) clock.lineTo(0.0, -42.0) clock.lineTo(2.0, -2.0) clock.lineTo(0.0, 0.0) clock.moveTo(0.0, 0.0) clock.lineTo(2.732, -0.732) clock.lineTo(24.495, 14.142) clock.lineTo(0.732, 2.732) clock.lineTo(0.0, 0.0) house = QtGui.QPainterPath() house.moveTo(-45.0, -20.0) house.lineTo(0.0, -45.0) house.lineTo(45.0, -20.0) house.lineTo(45.0, 45.0) house.lineTo(-45.0, 45.0) house.lineTo(-45.0, -20.0) house.addRect(15.0, 5.0, 20.0, 35.0) house.addRect(-35.0, -15.0, 25.0, 25.0) text = QtGui.QPainterPath() font = QtGui.QFont() font.setPixelSize(50) fontBoundingRect = QtGui.QFontMetrics(font).boundingRect(self.tr("Qt")) text.addText(-QtCore.QPointF(fontBoundingRect.center()), font, self.tr("Qt")) self.shapes = (clock, house, text, truck) self.connect(self.shapeComboBox, QtCore.SIGNAL("activated(int)"), self.shapeSelected) def operationChanged(self): operations = [] for i in range(Window.NumTransformedAreas): index = self.operationComboBoxes[i].currentIndex() operations.append(Window.operationTable[index]) self.transformedRenderAreas[i].setOperations(operations[:]) def shapeSelected(self, index): shape = self.shapes[index] self.originalRenderArea.setShape(shape) for i in range(Window.NumTransformedAreas): self.transformedRenderAreas[i].setShape(shape) if __name__ == "__main__": app = QtGui.QApplication(sys.argv) window = Window() window.show() sys.exit(app.exec_())