New upstream version 0.9.0upstream/0.9.0

1 files changed, 184 insertions, 0 deletions

diff --git a/raphodo/toggleswitch.py b/raphodo/toggleswitch.py
new file mode 100644
index 0000000..0f890f1
--- /dev/null
+++ b/raphodo/toggleswitch.py
@@ -0,0 +1,184 @@
+# Copyright (C) 2016 Damon Lynch <damonlynch@gmail.com>
+
+# This file is part of Rapid Photo Downloader.
+#
+# Rapid Photo Downloader is free software: you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Rapid Photo Downloader 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Rapid Photo Downloader.  If not,
+# see <http://www.gnu.org/licenses/>.
+
+"""
+Toggle Switch reminiscent of Android On/off switches:
+https://www.google.com/design/spec/components/selection-controls.html
+
+Visual style is rounded. However by adjusting the style sheet it can be
+made like a rounded square, close to how Gnome handles it, albeit
+without the "ON"/"OFF text.
+
+Inspiration:
+http://stackoverflow.com/questions/14780517/toggle-switch-in-qt
+http://thesmithfam.org/blog/2010/03/10/fancy-qslider-stylesheet/
+"""
+
+__author__ = 'Damon Lynch'
+__copyright__ = "Copyright 2016, Damon Lynch"
+
+from typing import Optional
+
+from PyQt5.QtCore import Qt, pyqtSlot
+from PyQt5.QtGui import QPalette, QColor, QFont,QFontMetrics
+from PyQt5.QtWidgets import QSlider, QApplication
+
+class QToggleSwitch(QSlider):
+    """
+    Toggle Switch reminiscent of Android On/off switches.
+
+    Connect to signal valueChanged to react to user setting the switch.
+    """
+    def __init__(self, background: Optional[QColor]=None, parent=None) -> None:
+        super().__init__(Qt.Horizontal, parent)
+
+        self.base_height = QFontMetrics(QFont()).height() // 2 * 2
+        self.radius = self.base_height // 2
+
+        width = self.base_height * 2
+        self.widgetWidth = width
+        self.handleWidth = width // 2
+        self.sliderRange = width
+        self.sliderMidPoint = width // 2
+        self.setRange(0, self.sliderRange)
+
+        self.setMaximumWidth(self.widgetWidth)
+        self.setFixedHeight(self.base_height + 6)
+
+        self.setStyleSheet(self.stylesheet(background))
+
+        self.actionTriggered.connect(self.onActionTriggered)
+        self.sliderReleased.connect(self.onSliderRelease)
+
+    def stylesheet(self, background: Optional[QColor]) -> str:
+        shading_intensity = 104
+        windowColor = (QPalette().color(QPalette().Window))  # type: QColor
+
+        if background is None:
+            backgroundName = windowColor.name()
+        else:
+            backgroundName = QColor(background).name()
+
+        handleLightName = (QPalette().color(QPalette().Light)).name() # type: QColor
+        handleDarkName = (QPalette().color(QPalette().Dark)).name()  # type: QColor
+        handleHoverLightName = (QPalette().color(QPalette().Light)).lighter(shading_intensity).name()
+        handleHoverDarkName = (QPalette().color(QPalette().Dark)).darker(shading_intensity).name()
+
+        insetDarkName = windowColor.darker(108).name()
+        insetLightName = windowColor.darker(102).name()
+
+        highlightColor = (QPalette().color(QPalette().Highlight))  # type: QColor
+        highlightLightName = highlightColor.lighter(110).name()
+        highlightDarkName = highlightColor.darker(130).name()
+
+        return """
+            QSlider::groove:horizontal {
+                background-color: %(backgroundName)s;
+                height: %(height)s px;
+            }
+
+            QSlider::sub-page:horizontal {
+            background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,
+                stop: 0 %(highlightDarkName)s, stop: 1 %(highlightLightName)s);
+            border: 1px solid #777;
+            border-top-left-radius: %(radius)spx;
+            border-bottom-left-radius: %(radius)spx;
+            }
+
+            QSlider::add-page:horizontal {
+            background: qlineargradient(x1: 0, y1: 0.2, x2: 1, y2: 1,
+                stop: 0 %(insetDarkName)s, stop: 1 %(insetLightName)s);
+            border: 1px solid #777;
+            border-top-right-radius: %(radius)spx;
+            border-bottom-right-radius: %(radius)spx;
+            }
+
+            QSlider::handle:horizontal {
+            background: qlineargradient(x1:0, y1:0, x2:1, y2:1,
+                stop:0 %(handleLightName)s, stop:1 %(handleDarkName)s);
+            border: 1px solid #777;
+            width: %(buttonWidth)s px;
+            border-radius: %(radius)spx;
+            }
+
+            QSlider::handle:horizontal:hover {
+            background: qlineargradient(x1:0, y1:0, x2:1, y2:1,
+                stop:0 %(handleHoverLightName)s, stop:1 %(handleHoverDarkName)s);
+            border: 1px solid #444;
+            border-radius: %(radius)spx;
+            }
+
+            QSlider::sub-page:horizontal:disabled {
+            background: #bbb;
+            border-color: #999;
+            }
+
+            QSlider::add-page:horizontal:disabled {
+            background: #eee;
+            border-color: #999;
+            }
+
+            QSlider::handle:horizontal:disabled {
+            background: #eee;
+            border: 1px solid #aaa;
+            border-radius: %(radius)spx;
+            }
+        """ % dict(buttonWidth=self.handleWidth,
+                   handleLightName=handleLightName,
+                   handleDarkName=handleDarkName,
+                   handleHoverLightName=handleHoverLightName,
+                   handleHoverDarkName=handleHoverDarkName,
+                   backgroundName=backgroundName,
+                   highlightDarkName=highlightDarkName,
+                   highlightLightName=highlightLightName,
+                   height=self.base_height,
+                   insetDarkName=insetDarkName,
+                   insetLightName=insetLightName,
+                   radius=self.radius)
+
+    @pyqtSlot(int)
+    def onActionTriggered(self, action: int) -> None:
+        if action != 7:
+            if action % 2:
+                self.setValue(self.sliderRange)
+            else:
+                self.setValue(0)
+
+    @pyqtSlot()
+    def onSliderRelease(self) -> None:
+        if self.sliderPosition() >= self.sliderMidPoint:
+            self.setValue(self.sliderRange)
+        else:
+            self.setValue(0)
+
+    def on(self) -> bool:
+        return self.value() == self.sliderRange
+
+    def setOn(self, on: bool=True) -> None:
+        if on:
+            self.setValue(self.sliderRange)
+        else:
+            self.setValue(0)
+
+
+if __name__ == "__main__":
+    import sys
+    app = QApplication(sys.argv)
+    b = QToggleSwitch()
+    b.show()
+    sys.exit(app.exec_())
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