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#!/usr/bin/env python
#############################################################################
##
## This file is part of Taurus
##
## http://taurus-scada.org
##
## Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
##
## Taurus is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## Taurus is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public License
## along with Taurus. If not, see <http://www.gnu.org/licenses/>.
##
#############################################################################
"""This module provides a demo for the
:class:`taurus.qt.qtgui.display.TaurusLabel` widget """
__all__ = ["demo", "main"]
__docformat__ = 'restructuredtext'
from taurus.external.qt import Qt
def demo():
import sys
import taurus.qt.qtgui.application
import taurus.qt.qtgui.display
import taurus.qt.qtgui.resource
getPixmap = taurus.qt.qtgui.resource.getPixmap
Application = taurus.qt.qtgui.application.TaurusApplication
QPixmapWidget = taurus.qt.qtgui.display.QPixmapWidget
app = Application.instance()
owns_app = app is None
if owns_app:
app = Application()
M = 2
class QPixmapWidgetTestPanel(Qt.QWidget):
def __init__(self, parent=None):
Qt.QWidget.__init__(self, parent)
panel_l = Qt.QVBoxLayout()
self.setLayout(panel_l)
panel_l.setContentsMargins(M, M, M, M)
panel_l.setSpacing(M)
w = QPixmapWidget()
display_panel = Qt.QGroupBox("Pixmap Widget Display")
display_l = Qt.QHBoxLayout()
display_l.setContentsMargins(M, M, M, M)
display_l.setSpacing(M)
display_panel.setLayout(display_l)
display_l.addWidget(w, 1)
control_panel = Qt.QGroupBox("Control Panel")
control_l = Qt.QFormLayout()
control_l.setContentsMargins(M, M, M, M)
control_l.setSpacing(M)
control_panel.setLayout(control_l)
pixmap_widget = Qt.QLineEdit()
aspect_ratio_widget = Qt.QComboBox()
transformation_widget = Qt.QComboBox()
halign_widget = Qt.QComboBox()
valign_widget = Qt.QComboBox()
control_l.addRow("pixmap:", pixmap_widget)
control_l.addRow("Aspect ratio mode:", aspect_ratio_widget)
control_l.addRow("Transformation mode:", transformation_widget)
control_l.addRow("Horiz. alignment:", halign_widget)
control_l.addRow("Vert. alignment:", valign_widget)
panel_l.addWidget(display_panel, 1)
panel_l.addWidget(control_panel, 0)
aspect_ratio_widget.addItems(["Ignore", "Keep", "Keep by expanding"])
transformation_widget.addItems(["Fast", "Smooth"])
halign_widget.addItem("Left", Qt.QVariant(Qt.Qt.AlignLeft))
halign_widget.addItem("Center", Qt.QVariant(Qt.Qt.AlignHCenter))
halign_widget.addItem("Right", Qt.QVariant(Qt.Qt.AlignRight))
valign_widget.addItem("Top", Qt.QVariant(Qt.Qt.AlignTop))
valign_widget.addItem("Center", Qt.QVariant(Qt.Qt.AlignVCenter))
valign_widget.addItem("Bottom", Qt.QVariant(Qt.Qt.AlignBottom))
Qt.QObject.connect(pixmap_widget, Qt.SIGNAL("textChanged(const QString &)"), self.changePixmap)
Qt.QObject.connect(aspect_ratio_widget, Qt.SIGNAL("currentIndexChanged(int)"), self.changeAspectRatio)
Qt.QObject.connect(transformation_widget, Qt.SIGNAL("currentIndexChanged(int)"), self.changeTransformationMode)
Qt.QObject.connect(halign_widget, Qt.SIGNAL("currentIndexChanged(int)"), self.changeAlignment)
Qt.QObject.connect(valign_widget, Qt.SIGNAL("currentIndexChanged(int)"), self.changeAlignment)
self.w = w
self.w_pixmap = pixmap_widget
self.w_aspect_ratio = aspect_ratio_widget
self.w_transformation = transformation_widget
self.w_halign = halign_widget
self.w_valign = valign_widget
pixmap_widget.setText(":leds/images256/led_red_on.png")
aspect_ratio_widget.setCurrentIndex(1)
transformation_widget.setCurrentIndex(1)
halign_widget.setCurrentIndex(0)
valign_widget.setCurrentIndex(1)
def changePixmap(self, name):
self.w.pixmap = getPixmap(name)
def changeAspectRatio(self, i):
v = Qt.Qt.IgnoreAspectRatio
if i == 1:
v = Qt.Qt.KeepAspectRatio
elif i == 2:
v = Qt.Qt.KeepAspectRatioByExpanding
self.w.setAspectRatioMode(v)
def changeTransformationMode(self, i):
v = Qt.Qt.FastTransformation
if i == 1:
v = Qt.Qt.SmoothTransformation
self.w.setTransformationMode(v)
def changeAlignment(self, i):
halign = self.w_halign.itemData(self.w_halign.currentIndex())
halign = Qt.from_qvariant(halign, int)
valign = self.w_valign.itemData(self.w_valign.currentIndex())
valign = Qt.from_qvariant(valign, int)
self.w.alignment = halign | valign
panel = Qt.QWidget()
layout=Qt.QGridLayout()
panel.setLayout(layout)
layout.setContentsMargins(M, M, M, M)
layout.setSpacing(M)
p1 = QPixmapWidgetTestPanel()
layout.addWidget(p1, 0, 0)
panel.show()
if owns_app:
sys.exit(app.exec_())
else:
return panel
def main():
return demo()
if __name__ == "__main__":
main()
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