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#!/usr/bin/env python
#****************************************************************************
#** $Id: qmag.py,v 1.1 2002/06/20 18:52:31 phil Exp $
#**
#** 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()
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