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#!/usr/bin/env python
"""PyQt4 port of the painting/svgviewer example from Qt v4.x"""
import sys
from PyQt4 import QtCore, QtGui, QtOpenGL, QtSvg
import svgviewer_rc
class MainWindow(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.currentPath = QtCore.QString()
self.area = SvgWindow()
fileMenu = QtGui.QMenu(self.tr("&File"), self)
self.openAction = fileMenu.addAction(self.tr("&Open..."))
self.openAction.setShortcut(QtGui.QKeySequence(self.tr("Ctrl+O")))
self.quitAction = fileMenu.addAction(self.tr("E&xit"))
self.quitAction.setShortcut(QtGui.QKeySequence(self.tr("Ctrl+Q")))
self.menuBar().addMenu(fileMenu)
rendererMenu = QtGui.QMenu(self.tr("&Renderer"), self)
self.nativeAction = rendererMenu.addAction(self.tr("&Native"))
self.nativeAction.setCheckable(True)
if QtOpenGL.QGLFormat.hasOpenGL():
self.glAction = rendererMenu.addAction(self.tr("&OpenGL"))
self.glAction.setCheckable(True)
self.imageAction = rendererMenu.addAction(self.tr("&Image"))
self.imageAction.setCheckable(True)
self.imageAction.setChecked(True)
rendererGroup = QtGui.QActionGroup(self)
rendererGroup.addAction(self.nativeAction)
if QtOpenGL.QGLFormat.hasOpenGL():
rendererGroup.addAction(self.glAction)
rendererGroup.addAction(self.imageAction)
self.menuBar().addMenu(rendererMenu)
self.connect(self.openAction, QtCore.SIGNAL("triggered()"), self.openFile)
self.connect(self.quitAction, QtCore.SIGNAL("triggered()"), QtGui.qApp, QtCore.SLOT("quit()"))
self.connect(rendererGroup, QtCore.SIGNAL("triggered(QAction *)"), self.setRenderer)
self.setCentralWidget(self.area)
self.setWindowTitle(self.tr("SVG Viewer"))
def openFile(self, path=""):
path = QtCore.QString(path)
if path.isEmpty():
fileName = QtGui.QFileDialog.getOpenFileName(self, self.tr("Open SVG File"),
self.currentPath, "*.svg")
else:
fileName = path
if not fileName.isEmpty():
self.area.openFile(fileName)
if not fileName.startsWith(":/"):
self.currentPath = fileName
self.setWindowTitle(self.tr("%1 - SVGViewer").arg(self.currentPath))
def setRenderer(self, action):
if action == self.nativeAction:
self.area.setRenderer(SvgWindow.Native)
elif action == self.glAction:
if QtOpenGL.QGLFormat.hasOpenGL():
self.area.setRenderer(SvgWindow.OpenGL)
elif action == self.imageAction:
self.area.setRenderer(SvgWindow.Image)
class SvgWindow(QtGui.QScrollArea):
Native, OpenGL, Image = range(3)
def __init__(self):
QtGui.QScrollArea.__init__(self)
self.mousePressPos = QtCore.QPoint()
self.scrollBarValuesOnMousePress = QtCore.QPoint()
self.currentPath = QtCore.QString()
self.view = QtGui.QWidget(self)
self.renderer = SvgWindow.Image
self.setWidget(self.view)
def openFile(self, path):
self.currentPath = path
self.setRenderer(self.renderer)
def setRenderer(self, renderer):
self.renderer = renderer
if self.renderer == SvgWindow.OpenGL:
if QtOpenGL.QGLFormat.hasOpenGL():
view = SvgGLView(self.currentPath, self)
else:
view = QtGui.QWidget()
elif self.renderer == SvgWindow.Image:
view = SvgRasterView(self.currentPath, self)
else:
view = SvgNativeView(self.currentPath, self)
self.setWidget(view)
view.show()
def mousePressEvent(self, event):
self.mousePressPos = QtCore.QPoint(event.pos())
self.scrollBarValuesOnMousePress.setX(self.horizontalScrollBar().value())
self.scrollBarValuesOnMousePress.setY(self.verticalScrollBar().value())
event.accept()
def mouseMoveEvent(self, event):
if self.mousePressPos.isNull():
event.ignore()
return
self.horizontalScrollBar().setValue(self.scrollBarValuesOnMousePress.x() - event.pos().x() + self.mousePressPos.x())
self.verticalScrollBar().setValue(self.scrollBarValuesOnMousePress.y() - event.pos().y() + self.mousePressPos.y())
self.horizontalScrollBar().update()
self.verticalScrollBar().update()
event.accept()
def mouseReleaseEvent(self, event):
self.mousePressPos = QtCore.QPoint()
event.accept()
class SvgGLView(QtOpenGL.QGLWidget):
def __init__(self, path, parent):
QtOpenGL.QGLWidget.__init__(self, QtOpenGL.QGLFormat(QtOpenGL.QGL.SampleBuffers))
self.doc = QtSvg.QSvgRenderer(path, self)
self.connect(self.doc, QtCore.SIGNAL("repaintNeeded()"),
self, QtCore.SLOT("update()"))
def paintEvent(self, e):
p = QtGui.QPainter(self)
self.doc.render(p)
def sizeHint(self):
if self.doc:
return self.doc.defaultSize()
return QtOpenGL.QGLWidget.sizeHint(self)
def wheelEvent(self, e):
diff = 0.1
size = QtCore.QSize(self.doc.defaultSize())
width = size.width()
height = size.height()
if e.delta() > 0:
width = int(self.width() + self.width() * diff)
height = int(self.height() + self.height() * diff)
else:
width = int(self.width() - self.width() * diff)
height = int(self.height() - self.height() * diff)
self.resize(width, height)
class SvgRasterView(QtGui.QWidget):
def __init__(self, path, parent):
QtGui.QWidget.__init__(self, parent)
self.buffer = QtGui.QImage()
self.m_dirty = False
self.doc = QtSvg.QSvgRenderer(path, self)
self.connect(self.doc, QtCore.SIGNAL("repaintNeeded()"), self.poluteImage)
def paintEvent(self, e):
if self.buffer.size() != self.size() or self.m_dirty:
self.buffer = QtGui.QImage(self.size(), QtGui.QImage.Format_ARGB32_Premultiplied)
p = QtGui.QPainter(self.buffer)
p.setViewport(0, 0, self.width(), self.height())
p.eraseRect(0, 0, self.width(), self.height())
self.doc.render(p)
pt = QtGui.QPainter(self)
pt.drawImage(0, 0, self.buffer)
def sizeHint(self):
if self.doc:
return self.doc.defaultSize()
return QtGui.QWidget.sizeHint(self)
def poluteImage(self):
self.m_dirty = True
self.update()
def wheelEvent(self, e):
diff = 0.1
size = QtCore.QSize(self.doc.defaultSize())
width = size.width()
height = size.height()
if e.delta() > 0:
width = int(self.width() + self.width() * diff)
height = int(self.height() + self.height() * diff)
else:
width = int(self.width() - self.width() * diff)
height = int(self.height() - self.height() * diff)
self.resize(width, height)
class SvgNativeView(QtGui.QWidget):
def __init__(self, path, parent):
QtGui.QWidget.__init__(self, parent)
self.doc = QtSvg.QSvgRenderer(path, self)
self.connect(self.doc, QtCore.SIGNAL("repaintNeeded()"),
self, QtCore.SLOT("update()"))
def paintEvent(self, e):
p = QtGui.QPainter(self)
p.setViewport(0, 0, self.width(), self.height())
self.doc.render(p)
def sizeHint(self):
if self.doc:
return self.doc.defaultSize()
return QtGui.QWidget.sizeHint(self)
def wheelEvent(self, e):
diff = 0.1
size = QtCore.QSize(self.doc.defaultSize())
width = size.width()
height = size.height()
if e.delta() > 0:
width = int(self.width() + self.width() * diff)
height = int(self.height() + self.height() * diff)
else:
width = int(self.width() - self.width() * diff)
height = int(self.height() - self.height() * diff)
self.resize(width, height)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
window = MainWindow()
if len(sys.argv) == 2:
window.openFile(sys.argv[1])
else:
window.openFile(":/files/cubic.svg")
window.show()
sys.exit(app.exec_())
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