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Diffstat (limited to 'python/pyqt/examples3/qmag.py')
| -rwxr-xr-x | python/pyqt/examples3/qmag.py | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/python/pyqt/examples3/qmag.py b/python/pyqt/examples3/qmag.py new file mode 100755 index 00000000..6a136481 --- /dev/null +++ b/python/pyqt/examples3/qmag.py @@ -0,0 +1,233 @@ +#!/usr/bin/env python + +#**************************************************************************** +#** $Id$ +#** +#** Copyright (C) 1992-1998 Troll Tech AS. All rights reserved. +#** +#** This file is part of an example program for PyQt. This example +#** program may be used, distributed and modified without limitation. +#** +#*****************************************************************************/ + +import sys +from qt import * + +TRUE = 1 +FALSE = 0 + +zoomfactors = ["100%","200%","300%","400%","500%","600%","700%","800%","1600%"] + +refreshrates = [ + "No autorefresh", "50 per second", "4 per second", "3 per second", + "2 per second", "Every second", "Every two seconds", "Every three seconds", + "Every five seconds", "Every ten seconds"] + +timer = (0, 20, 250, 333, 500, 1000, 2000, 3000, 5000, 10000) + +class MagWidget(QWidget): + def __init__(self, qApp, parent = None, name = None): + self.qApp = qApp + QWidget.__init__(self, parent, name) + self.pm = QPixmap() # pixmap magnified + self.p = QPixmap() # pixmap + self.image = QImage() # image of pixmap (for RGB) + self.z = 0 # zoom factor + self.r = 0 # autorefresh rate (index into refreshrates) + self.grabbing = FALSE # TRUE if currently grabbing + self.grabx = -1 + self.graby = -1 + + self.zoom = QComboBox(FALSE, self) + self.zoom.insertStrList(zoomfactors, len(zoomfactors)) + self.connect(self.zoom, SIGNAL("activated(int)"), + self.setZoom) + + self.refresh = QComboBox(FALSE, self) + self.refresh.insertStrList(refreshrates, len(refreshrates)) + self.connect(self.refresh, SIGNAL("activated(int)"), + self.setRefresh) + + x = 0 + w = 0 + h = 20 + for s in zoomfactors: + cw = self.zoom.fontMetrics().width(s) + w = max(cw, w) + self.zoom.setGeometry(x, 2, w + 30, h) + + x = w + 34 + w = 0 + for s in refreshrates: + cw = self.refresh.fontMetrics().width(s) + w = max(cw, w) + self.refresh.setGeometry(x, 2, w + 30, h) + + self.saveButton = QPushButton(self) + self.connect(self.saveButton, SIGNAL("clicked()"), self.save) + self.saveButton.setText("Save") + self.saveButton.setGeometry(x + w + 30 + 2, 2, + 10 + self.saveButton.fontMetrics().width("Save"), h) + + self.quitButton = QPushButton(self) + self.connect(self.quitButton, SIGNAL("clicked()"), self.qApp, SLOT("quit()")) + self.quitButton.setText("Quit") + self.quitButton.setGeometry(self.saveButton.geometry().right() + 2, 2, + 10 + self.quitButton.fontMetrics().width("Quit"), h) + + self.rgb = QLabel(self) + self.rgb.setText("") + self.rgb.setAlignment(Qt.AlignVCenter) + self.rgb.resize(self.width(), self.rgb.fontMetrics().height() + 4) + + self.yoffset = self.zoom.height() + 4 + self.rgb.height() + self.setMinimumSize(self.quitButton.geometry().topRight().x() + 2, + self.yoffset + 20) + w = self.quitButton.geometry().topRight().x() + 2 + self.resize(w, w) + + self.setMouseTracking(TRUE) + self.grabx = self.qApp.desktop().width() / 2 + self.graby = self.qApp.desktop().height() / 2 + self.grabAround(QPoint(self.grabx, self.graby)) + + #self.zoom.setCurrentItem(1) # grabAround sets zoom factor + #self.setZoom(1) + self.refresh.setCurrentItem(5) + self.setRefresh(5) + + def setZoom(self, index): + if index == 8: + self.z = 16 + else: + self.z = index + 1 + self.grab() + + def setRefresh(self, index): + self.r = index + self.killTimers() + if index and not self.grabbing: + #print "st:", timer[index] + self.startTimer(timer[index]) + + def save(self): + if not self.p.isNull(): + self.killTimers() + fn = QFileDialog.getSaveFileName() + if not fn.isEmpty(): + self.p.save(fn, "BMP") + if self.r: + self.startTimer(timer[self.r]) + + def grab(self): + if not self.isVisible() or self.grabx < 0 or self.graby < 0: + return + + w = (self.width() + self.z - 1) / self.z + h = (self.height() + self.z - 1 - self.yoffset) / self.z + + if w < 1 or h < 1: + return + + x = self.grabx - w / 2 + y = self.graby - h / 2 + + if x + w > QApplication.desktop().width(): + x = QApplication.desktop().width() - w + elif x < 0: + x = 0 + + if y + h > QApplication.desktop().height(): + y = QApplication.desktop().height() - h + elif y < 0: + y = 0 + + self.p = QPixmap.grabWindow(QApplication.desktop().winId(), x, y, w, h) + self.image = self.p.convertToImage() + m = QWMatrix() + #print "z:", self.z + m.scale(float(self.z), float(self.z)) + self.pm = self.p.xForm(m) + self.repaint(FALSE) + + def paintEvent(self, e): + if not self.pm.isNull(): + paint = QPainter(self) + paint.drawPixmap(0, self.zoom.height() + 4, self.pm, + 0, 0, self.width(), self.height() - self.yoffset) + + def mousePressEvent(self, e): + if not self.grabbing: + self.grabbing = TRUE + self.killTimers() + self.grabMouse(Qt.crossCursor) + self.grabx = -1 + self.graby = -1 + else: + self.grabx = self.mapToGlobal(e.pos()).x() + self.graby = self.mapToGlobal(e.pos()).y() + + def mouseReleaseEvent(self, e): + if self.grabbing and self.grabx >= 0 and self.graby >= 0: + self.grabbing = FALSE + self.grabAround(e.pos()) + self.releaseMouse() + + def grabAround(self, pos): + rx = self.mapToGlobal(pos).x() + ry = self.mapToGlobal(pos).y() + w = abs(rx - self.grabx) + h = abs(ry - self.graby) + if w > 10 and h > 10: + pz = 1 + while w*pz*h*pz < self.width()*(self.height()-self.yoffset) and \ + w*pz < QApplication.desktop().width() and \ + h*pz < QApplication.desktop().height(): + pz += 1 + if (w*pz*h*pz - self.width()*(self.height()-self.yoffset)) > \ + (self.width()*(self.height()-self.yoffset) - w*(pz-1)*h*(pz-1)): + pz -= 1 + if pz < 1: + pz = 1 + elif pz > 8: + pz = 8 + self.zoom.setCurrentItem(pz-1) + self.z = pz + self.grabx = min(rx, self.grabx) + w / 2 + self.graby = min(ry, self.graby) + h / 2 + #self.resize(w*self.z, h*self.z*self.yoffset) + self.grab() + + def mouseMoveEvent(self, e): + if self.grabbing or self.pm.isNull() or \ + e.pos().y() > self.height() - self.zoom.fontMetrics().height() - 4 or \ + e.pos().y() < self.zoom.height() + 4: + self.rgb.setText("") + else: + x = e.pos().x() / self.z + y = (e.pos().y() - self.zoom.height() - 4) / self.z + pixelinfo = "" + if self.image.valid(x, y): + px = self.image.pixel(x, y) + pixelinfo = "%3d,%3d,%3d #%02x%02x%02x" % ( + qRed(px), qGreen(px), qBlue(px), + qRed(px), qGreen(px), qBlue(px)) + self.rgb.setText("x=%d, y=%d %s" % \ + (x + self.grabx, y + self.graby, pixelinfo)) + + def focusOutEvent(self, e): + self.rgb.setText("") + + def timerEvent(self, e): + self.grab() + + def resizeEvent(self, e): + self.rgb.setGeometry(0, self.height() - self.rgb.height(), + self.width(), self.rgb.height()) + +if __name__=='__main__': + app = QApplication( sys.argv ) + m = MagWidget(app) + app.setMainWidget(m) + m.show() + app.exec_loop() |