customizable keyboard shortcuts

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);
+    }
+}