Merge pull request #71 from Alexhuszagh/branchless

Add example of branchless indicators.

example/branchless/README.md

@@ -0,0 +1,29 @@
+branchless
+==========
+
+This contains an example widget for a `QTreeView` where the branch indicators are hidden. In order to add these branchless indicators to your project, copy this directory into the [extension](/extension) folder, and then configure with (adding any additional resources or styles as you see fit):
+
+```bash
+python configure.py --extensions=branchless --resource custom.qrc
+```
+
+## Example
+
+<p align="center"><b>Dark</b></p>
+<figure>
+    <img
+        alt="Breeze Dark theme using branchless indicators for Windows"
+        src="/assets/breeze_dark_branchless.png"
+        title="BreezeDarkBranchless"
+    />
+</figure>
+
+
+<p align="center"><b>Light</b></p>
+<figure>
+    <img
+        alt="Breeze Light theme using branchless indicators for Windows"
+        src="/assets/breeze_light_branchless.png"
+        title="BreezeLightBranchless"
+    />
+</figure>

example/branchless/application.py

@@ -0,0 +1,101 @@
+#!/usr/bin/env python
+#
+# The MIT License (MIT)
+#
+# Copyright (c) <2022-Present> <Alex Huszagh>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the 'Software'), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+import os
+import sys
+
+HOME = os.path.dirname(os.path.realpath(__file__))
+sys.path.insert(0, os.path.dirname(HOME))
+
+import widgets
+import shared
+
+parser = shared.create_parser()
+args, unknown = shared.parse_args(parser)
+QtCore, QtGui, QtWidgets = shared.import_qt(args)
+compat = shared.get_compat_definitions(args)
+ICON_MAP = shared.get_icon_map(args, compat)
+
+
+def set_stylesheet(args, app, compat):
+    '''Set the application stylesheet.'''
+
+    if args.stylesheet != 'native':
+        resource_format = shared.get_resources(args)
+        qt_path = shared.get_stylesheet(resource_format)
+        ext_path = os.path.join(HOME, 'stylesheet.qss.in')
+        stylesheet = shared.read_qtext_file(qt_path, compat)
+        stylesheet += '\n' + open(ext_path, 'r').read()
+        app.setStyleSheet(stylesheet)
+
+
+def get_treeviews(parent, depth=1000):
+    for child in parent.children():
+        if isinstance(child, QtWidgets.QTreeView):
+            yield child
+        elif depth > 0:
+            yield from get_treeviews(child, depth - 1)
+
+
+def main():
+    'Application entry point'
+
+    # this is mostly a hack to get simplify using the same UI but with
+    # minimal additions to modify the stylesheet
+    app, window = shared.setup_app(args, unknown, compat)
+
+    # setup ui
+    ui = widgets.Ui()
+    ui.setup(window)
+    ui.bt_delay_popup.addActions([
+        ui.actionAction,
+        ui.actionAction_C
+    ])
+    ui.bt_instant_popup.addActions([
+        ui.actionAction,
+        ui.actionAction_C
+    ])
+    ui.bt_menu_button_popup.addActions([
+        ui.actionAction,
+        ui.actionAction_C
+    ])
+    window.setWindowTitle('Sample BreezeStyleSheets application.')
+
+    # Add event triggers
+    ui.actionAction.triggered.connect(ui.about)
+    ui.actionAction_C.triggered.connect(ui.critical)
+
+    # tabify dock widgets to show bug #6
+    window.tabifyDockWidget(ui.dockWidget1, ui.dockWidget2)
+
+    # add object names to all the widgets so we don't have to recreate a UI
+    for tree in get_treeviews(window):
+        tree.setObjectName("branchless")
+
+    set_stylesheet(args, app, compat)
+    return shared.exec_app(args, app, window, compat)
+
+
+if __name__ == '__main__':
+    sys.exit(main())

example/branchless/stylesheet.qss.in

@@ -0,0 +1,43 @@
+/**
+ *  BRANCHLESS QTREEVIEW STYLESHEET
+ *  -------------------------------
+ */
+
+/**
+ *  We disable all the border images for the branch indicators, while
+ *  keeping the images for the branch closed/open and hover variants
+ *  the default.
+ */
+QTreeView[objectName="branchless"]::branch:has-siblings
+{
+    border-image: none;
+    image: none;
+}
+
+QTreeView[objectName="branchless"]::branch:!has-siblings
+{
+    border-image: none;
+    image: none;
+}
+
+QTreeView[objectName="branchless"]::branch:has-siblings:adjoins-item
+{
+    border-image: none;
+}
+
+QTreeView[objectName="branchless"]::branch:!has-children:!has-siblings:adjoins-item
+{
+    border-image: none;
+}
+
+QTreeView[objectName="branchless"]::branch:has-children:!has-siblings:closed,
+QTreeView[objectName="branchless"]::branch:open:has-children:!has-siblings
+{
+    border-image: none;
+}
+
+QTreeView[objectName="branchless"]::branch:closed:has-children:has-siblings,
+QTreeView[objectName="branchless"]::branch:open:has-children:has-siblings
+{
+    border-image: none;
+}

example/shared.py

@@ -912,16 +912,19 @@ def setup_app(args, unknown, compat, style_class=None, window_class=None):
 
     return app, window
 
+def read_qtext_file(path, compat):
+    file = compat.QtCore.QFile(path)
+    file.open(compat.ReadOnly | compat.Text)
+    stream = compat.QtCore.QTextStream(file)
+    return stream.readAll()
+
 def set_stylesheet(args, app, compat):
     '''Set the application stylesheet.'''
 
     if args.stylesheet != 'native':
         resource_format = get_resources(args)
         stylesheet = get_stylesheet(resource_format)
-        file = compat.QtCore.QFile(stylesheet)
+        app.setStyleSheet(read_qtext_file(stylesheet, compat))
-        file.open(compat.ReadOnly | compat.Text)
-        stream = compat.QtCore.QTextStream(file)
-        app.setStyleSheet(stream.readAll())
 
 def exec_app(args, app, window, compat):
     '''Show and execute the Qt application.'''