PyQT5 OpenGL zoom
So I wanted to make a zoom functionality in PyQT. And from answer 8.040 I implemented it as such:
class GLWindow(QOpenGLWidget):
def __init__(self, parent=None):
super(GLWindow, self).__init__(parent)
self.object = 0
self.zoomFactor = 1.0
self.setFocusPolicy(Qt.WheelFocus)
self.lastPos = QPoint()
and
def resizeGL(self, width, height):
gl.glViewport(0, 0, width, height)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
gl.glOrtho(-2 * self.zoomFactor, +2 * self.zoomFactor, +2 * self.zoomFactor, -2 * self.zoomFactor, 4.0, 15.0)
gl.glMatrixMode(gl.GL_MODELVIEW)
Now at the start of the program if I change the self.zoomFactor to let's say 2.0, it has the desired effect of a zoom, but I can't seem to resize it while running.
def wheelEvent(self, event):
"""http://doc.qt.io/qt-5/qwheelevent.html"""
scroll = event.angleDelta()
if scroll.y() > 0: # up
self.zoomFactor += 0.1
self.resizeGL(self.width(), self.height())
self.update()
pass
else: # down
pass
The above code is how I tried it already, without the desired effect. It catches the upwards zoom and calls the resizeGL function, but won't zoom in/out.
python python-3.x opengl pyqt pyqt5
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
add a comment |
So I wanted to make a zoom functionality in PyQT. And from answer 8.040 I implemented it as such:
class GLWindow(QOpenGLWidget):
def __init__(self, parent=None):
super(GLWindow, self).__init__(parent)
self.object = 0
self.zoomFactor = 1.0
self.setFocusPolicy(Qt.WheelFocus)
self.lastPos = QPoint()
and
def resizeGL(self, width, height):
gl.glViewport(0, 0, width, height)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
gl.glOrtho(-2 * self.zoomFactor, +2 * self.zoomFactor, +2 * self.zoomFactor, -2 * self.zoomFactor, 4.0, 15.0)
gl.glMatrixMode(gl.GL_MODELVIEW)
Now at the start of the program if I change the self.zoomFactor to let's say 2.0, it has the desired effect of a zoom, but I can't seem to resize it while running.
def wheelEvent(self, event):
"""http://doc.qt.io/qt-5/qwheelevent.html"""
scroll = event.angleDelta()
if scroll.y() > 0: # up
self.zoomFactor += 0.1
self.resizeGL(self.width(), self.height())
self.update()
pass
else: # down
pass
The above code is how I tried it already, without the desired effect. It catches the upwards zoom and calls the resizeGL function, but won't zoom in/out.
python python-3.x opengl pyqt pyqt5
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
add a comment |
So I wanted to make a zoom functionality in PyQT. And from answer 8.040 I implemented it as such:
class GLWindow(QOpenGLWidget):
def __init__(self, parent=None):
super(GLWindow, self).__init__(parent)
self.object = 0
self.zoomFactor = 1.0
self.setFocusPolicy(Qt.WheelFocus)
self.lastPos = QPoint()
and
def resizeGL(self, width, height):
gl.glViewport(0, 0, width, height)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
gl.glOrtho(-2 * self.zoomFactor, +2 * self.zoomFactor, +2 * self.zoomFactor, -2 * self.zoomFactor, 4.0, 15.0)
gl.glMatrixMode(gl.GL_MODELVIEW)
Now at the start of the program if I change the self.zoomFactor to let's say 2.0, it has the desired effect of a zoom, but I can't seem to resize it while running.
def wheelEvent(self, event):
"""http://doc.qt.io/qt-5/qwheelevent.html"""
scroll = event.angleDelta()
if scroll.y() > 0: # up
self.zoomFactor += 0.1
self.resizeGL(self.width(), self.height())
self.update()
pass
else: # down
pass
The above code is how I tried it already, without the desired effect. It catches the upwards zoom and calls the resizeGL function, but won't zoom in/out.
python python-3.x opengl pyqt pyqt5
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
So I wanted to make a zoom functionality in PyQT. And from answer 8.040 I implemented it as such:
class GLWindow(QOpenGLWidget):
def __init__(self, parent=None):
super(GLWindow, self).__init__(parent)
self.object = 0
self.zoomFactor = 1.0
self.setFocusPolicy(Qt.WheelFocus)
self.lastPos = QPoint()
and
def resizeGL(self, width, height):
gl.glViewport(0, 0, width, height)
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glLoadIdentity()
gl.glOrtho(-2 * self.zoomFactor, +2 * self.zoomFactor, +2 * self.zoomFactor, -2 * self.zoomFactor, 4.0, 15.0)
gl.glMatrixMode(gl.GL_MODELVIEW)
Now at the start of the program if I change the self.zoomFactor to let's say 2.0, it has the desired effect of a zoom, but I can't seem to resize it while running.
def wheelEvent(self, event):
"""http://doc.qt.io/qt-5/qwheelevent.html"""
scroll = event.angleDelta()
if scroll.y() > 0: # up
self.zoomFactor += 0.1
self.resizeGL(self.width(), self.height())
self.update()
pass
else: # down
pass
The above code is how I tried it already, without the desired effect. It catches the upwards zoom and calls the resizeGL function, but won't zoom in/out.
python python-3.x opengl pyqt pyqt5
python python-3.x opengl pyqt pyqt5
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
asked Nov 22 '18 at 10:55
P. DaimaouP. Daimaou
365
365
add a comment |
add a comment |
1 Answer
1
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Got the answer. It does work. The resizeGL only updates when resizing the window, so we have to use it in another method.
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
The method I use it in now ispaintGL
– P. Daimaou
Nov 22 '18 at 12:36
add a comment |
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1 Answer
1
active
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Got the answer. It does work. The resizeGL only updates when resizing the window, so we have to use it in another method.
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
The method I use it in now ispaintGL
– P. Daimaou
Nov 22 '18 at 12:36
add a comment |
Got the answer. It does work. The resizeGL only updates when resizing the window, so we have to use it in another method.
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
The method I use it in now ispaintGL
– P. Daimaou
Nov 22 '18 at 12:36
add a comment |
Got the answer. It does work. The resizeGL only updates when resizing the window, so we have to use it in another method.
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
Got the answer. It does work. The resizeGL only updates when resizing the window, so we have to use it in another method.
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
answered Nov 22 '18 at 12:08
P. DaimaouP. Daimaou
365
365
The method I use it in now ispaintGL
– P. Daimaou
Nov 22 '18 at 12:36
add a comment |
The method I use it in now ispaintGL
– P. Daimaou
Nov 22 '18 at 12:36
The method I use it in now is
paintGL– P. Daimaou
Nov 22 '18 at 12:36
The method I use it in now is
paintGL– P. Daimaou
Nov 22 '18 at 12:36
add a comment |
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