From c340901419d9cbd4dfd470e17a45950b35437287 Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Sat, 21 Jul 2018 14:21:57 +0100
Subject: [PATCH] customizable keyboard shortcuts

---
 dialogs/preferencesdialog.cpp | 59 +++++++++++++++++++++++-
 dialogs/preferencesdialog.h   | 14 ++++++
 dialogs/preferencesdialog.ui  | 87 ++++++++++++++++++++++++++---------
 mainwindow.cpp                |  1 +
 4 files changed, 137 insertions(+), 24 deletions(-)

diff --git a/dialogs/preferencesdialog.cpp b/dialogs/preferencesdialog.cpp
index 1c20a76b0..43ec2d9af 100644
--- a/dialogs/preferencesdialog.cpp
+++ b/dialogs/preferencesdialog.cpp
@@ -1,6 +1,20 @@
 #include "preferencesdialog.h"
 #include "ui_preferencesdialog.h"
 
+#include <QMenuBar>
+#include <QAction>
+#include <QDebug>
+
+KeySequenceEditor::KeySequenceEditor(QAction* a)
+    : QKeySequenceEdit(0), action(a) {
+    setKeySequence(action->shortcut());
+    connect(this, SIGNAL(editingFinished()), this, SLOT(set_action_shortcut()));
+}
+
+void KeySequenceEditor::set_action_shortcut() {
+    action->setShortcut(keySequence());
+}
+
 PreferencesDialog::PreferencesDialog(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::PreferencesDialog)
@@ -8,7 +22,48 @@ PreferencesDialog::PreferencesDialog(QWidget *parent) :
     ui->setupUi(this);
 }
 
-PreferencesDialog::~PreferencesDialog()
-{
+PreferencesDialog::~PreferencesDialog() {
     delete ui;
 }
+
+void PreferencesDialog::setup_kbd_shortcuts(QMenuBar* menubar) {
+    ui->treeWidget->clear();
+    QList<QMenu*> menus = menubar->findChildren<QMenu*>();
+
+    // caching for parent-child pairing
+    QVector<QTreeWidgetItem*> added_action_items;
+    QVector<QAction*> added_actions;
+
+    for (int i=0;i<menus.size();i++) {
+        QMenu* menu = menus.at(i);
+        QTreeWidgetItem* item = NULL;
+        if (menu->parent() != menubar) {
+            for (int j=0;j<added_actions.size();j++) {
+                if (added_actions.at(j)->menu() == menu) {
+                    item = added_action_items.at(j);
+                    break;
+                }
+            }
+        }
+        if (menu->parent() == menubar || item == NULL) {
+            item = new QTreeWidgetItem();
+            item->setText(0, menu->title().replace("&", ""));
+            ui->treeWidget->addTopLevelItem(item);
+        }
+        for (int j=0;j<menu->actions().size();j++) {
+            QAction* action = menu->actions().at(j);
+            if (!action->isSeparator()) {
+                QTreeWidgetItem* child = new QTreeWidgetItem();
+                child->setText(0, action->text().replace("&", ""));
+                item->addChild(child);
+
+                added_actions.append(action);
+                added_action_items.append(child);
+            }
+        }
+    }
+    for (int i=0;i<added_action_items.size();i++) {
+        KeySequenceEditor* editor = new KeySequenceEditor(added_actions.at(i));
+        ui->treeWidget->setItemWidget(added_action_items.at(i), 1, editor);
+    }
+}
diff --git a/dialogs/preferencesdialog.h b/dialogs/preferencesdialog.h
index 3e2a5ed2f..2d9471a8b 100644
--- a/dialogs/preferencesdialog.h
+++ b/dialogs/preferencesdialog.h
@@ -2,6 +2,8 @@
 #define PREFERENCESDIALOG_H
 
 #include <QDialog>
+#include <QKeySequenceEdit>
+class QMenuBar;
 
 namespace Ui {
 class PreferencesDialog;
@@ -15,8 +17,20 @@ public:
     explicit PreferencesDialog(QWidget *parent = 0);
     ~PreferencesDialog();
 
+    void setup_kbd_shortcuts(QMenuBar* menu);
+
 private:
     Ui::PreferencesDialog *ui;
 };
 
+class KeySequenceEditor : public QKeySequenceEdit {
+    Q_OBJECT
+public:
+    KeySequenceEditor(QAction* a);
+private slots:
+    void set_action_shortcut();
+private:
+    QAction* action;
+};
+
 #endif // PREFERENCESDIALOG_H
diff --git a/dialogs/preferencesdialog.ui b/dialogs/preferencesdialog.ui
index ec7fea199..cfc822350 100644
--- a/dialogs/preferencesdialog.ui
+++ b/dialogs/preferencesdialog.ui
@@ -1,38 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
- <author/>
- <comment/>
- <exportmacro/>
  <class>PreferencesDialog</class>
  <widget class="QDialog" name="PreferencesDialog">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>400</width>
-    <height>300</height>
+    <width>693</width>
+    <height>491</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Dialog</string>
   </property>
-  <widget class="QDialogButtonBox" name="buttonBox">
-   <property name="geometry">
-    <rect>
-     <x>30</x>
-     <y>240</y>
-     <width>341</width>
-     <height>32</height>
-    </rect>
-   </property>
-   <property name="orientation">
-    <enum>Qt::Horizontal</enum>
-   </property>
-   <property name="standardButtons">
-    <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
-   </property>
-  </widget>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QTabWidget" name="tabWidget">
+     <property name="currentIndex">
+      <number>2</number>
+     </property>
+     <widget class="QWidget" name="tab">
+      <attribute name="title">
+       <string>General</string>
+      </attribute>
+     </widget>
+     <widget class="QWidget" name="tab_2">
+      <attribute name="title">
+       <string>Behavior</string>
+      </attribute>
+     </widget>
+     <widget class="QWidget" name="tab_3">
+      <attribute name="title">
+       <string>Keyboard</string>
+      </attribute>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <property name="leftMargin">
+        <number>0</number>
+       </property>
+       <property name="topMargin">
+        <number>0</number>
+       </property>
+       <property name="rightMargin">
+        <number>0</number>
+       </property>
+       <property name="bottomMargin">
+        <number>0</number>
+       </property>
+       <item>
+        <widget class="QTreeWidget" name="treeWidget">
+         <column>
+          <property name="text">
+           <string notr="true">Action</string>
+          </property>
+         </column>
+         <column>
+          <property name="text">
+           <string>Shortcut</string>
+          </property>
+         </column>
+        </widget>
+       </item>
+      </layout>
+     </widget>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
  </widget>
- <pixmapfunction/>
  <resources/>
  <connections>
   <connection>
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 5a98eb94f..f0e281546 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -478,6 +478,7 @@ void MainWindow::on_actionGo_to_Next_Cut_triggered()
 void MainWindow::on_actionPreferences_triggered()
 {
     PreferencesDialog pd(this);
+    pd.setup_kbd_shortcuts(this->menuBar());
     pd.exec();
 }