Close tabs by middle clicking

Author: ihabunek

pugdebug/gui/documents.py

@@ -11,7 +11,7 @@
 
 
 from PyQt5.QtWidgets import QTabWidget
-
+from pugdebug.gui.widgets.tabbar import PugdebugTabBar;
 
 class PugdebugDocumentViewer(QTabWidget):
 
@@ -20,6 +20,11 @@ class PugdebugDocumentViewer(QTabWidget):
     def __init__(self):
         super(PugdebugDocumentViewer, self).__init__()
 
+        # Use the extended tab bar wiget to have middle click close tabs
+        self.tab_bar = PugdebugTabBar()
+        self.tab_bar.middle_clicked_signal.connect(self.close_tab)
+        self.setTabBar(self.tab_bar)
+
         self.setTabsClosable(True)
 
     def add_tab(self, document_widget, filename, path):

pugdebug/gui/widgets/__init__.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+
+"""
+    pugdebug - a standalone PHP debugger
+    =========================
+    copyright: (c) 2015 Robert Basic
+    license: GNU GPL v3, see LICENSE for more details
+"""
+
+__author__ = "ihabunek"
+
+from PyQt5.QtCore import Qt, pyqtSignal
+from PyQt5.QtWidgets import QTabBar
+
+
+class PugdebugTabBar(QTabBar):
+    """Adds a signal when the middle button is clicked to the QTabBar widget.
+
+    A click is defined as a press event followed by a release event over the
+    same tab.
+
+    Stolen from: http://stackoverflow.com/a/9445581/84245
+    """
+    middle_clicked_signal = pyqtSignal(int)
+
+    def __init__(self):
+        super(QTabBar, self).__init__()
+        self.previousMiddleIndex = -1
+
+    def mousePressEvent(self, mouseEvent):
+        """Triggered when a mouse button is pressed.
+
+        If it's the middle button, remember which over which tab it was pressed.
+        """
+        if mouseEvent.button() == Qt.MidButton:
+            self.previousIndex = self.tabAt(mouseEvent.pos())
+        QTabBar.mousePressEvent(self, mouseEvent)
+
+    def mouseReleaseEvent(self, mouseEvent):
+        """Triggered when a mouse button is released.
+
+        If a middle button was pressed previously, and if it is released over
+        the same tab, emit the signal.
+        """
+        if mouseEvent.button() == Qt.MidButton and \
+            self.previousIndex == self.tabAt(mouseEvent.pos()):
+            self.middle_clicked_signal.emit(self.previousIndex)
+        self.previousIndex = -1
+        QTabBar.mouseReleaseEvent(self, mouseEvent)