[rkward/work/preview_with_menu] rkward/plugin: First attempt at bringing more functionality (menus) into the previews. Implementation is still a bit hacky.

[Thomas Friedrichsmeier]

Git commit f70de7951fdc181f5bf875249b2e18b403756da9 by Thomas Friedrichsmeier.
Committed on 01/02/2016 at 20:31.
Pushed by tfry into branch 'work/preview_with_menu'.

First attempt at bringing more functionality (menus) into the previews. Implementation is still a bit hacky.

M  +69   -1    rkward/plugin/rkpreviewbox.cpp
M  +2    -0    rkward/plugin/rkstandardcomponentgui.cpp

http://commits.kde.org/rkward/f70de7951fdc181f5bf875249b2e18b403756da9

diff --git a/rkward/plugin/rkpreviewbox.cpp b/rkward/plugin/rkpreviewbox.cpp
index 2fad847..b178c34 100644
--- a/rkward/plugin/rkpreviewbox.cpp
+++ b/rkward/plugin/rkpreviewbox.cpp
@@ -35,6 +35,74 @@
 
 #define DO_PREVIEW 102
 
+#include <kxmlguifactory.h>
+#include <QMenu>
+#include <QToolButton>
+#include <QEvent>
+#include <QMenuBar>
+#include <kxmlguiwindow.h>
+#include <ktoolbar.h>
+#include <kmenubar.h>
+#include <QPointer>
+
+class RKXMLGUIPreviewArea : public KXmlGuiWindow {
+public:
+	explicit RKXMLGUIPreviewArea (QWidget* parent) : KXmlGuiWindow (parent) {
+		RK_TRACE (PLUGIN);
+		menu_button = new QToolButton (this);
+		menu_button->setPopupMode (QToolButton::InstantPopup);
+		menu_button->setIcon (QIcon::fromTheme ("menu_new"));
+		menu_button->setObjectName ("menubutton");
+		menu_button->setMenu (menu = new QMenu ());
+		current = 0;
+		setWindowFlags (Qt::Widget);
+		setMenuBar (new QMenuBar (this));
+		setHelpMenuEnabled (false);
+	}
+	~RKXMLGUIPreviewArea () {
+		RK_TRACE (PLUGIN);
+
+		if (current) {
+			removeChildClient (current);
+			current->setFactory (0);
+		}
+	}
+protected:
+	/** build / destroy menu, when child is added removed. Note that we are in the fortunate situation that RKMDIWindow-children only ever get to the
+	 *  preview area via reparenting, i.e. contrary to usual QEvent::ChildAdded semnatics, they are always fully constructed, when added. */
+	void childEvent (QChildEvent *event) {  // KF5 TODO: override keyword
+		RK_TRACE (PLUGIN);
+
+		if (event->type () == QEvent::ChildAdded) {
+			RKMDIWindow *child = qobject_cast<RKMDIWindow*> (event->child ());
+			if (child) {
+				if (current) {
+					removeChildClient (current);
+					factory ()->removeClient (current);  // _always_ remove before adding, or the previous child will be leaked in the factory
+				}
+				current = child->getPart ();
+				insertChildClient (current);
+				setCentralWidget (child);
+				createGUI ("rkdummypart.rc");
+				menuBar ()->hide ();
+				QList<KToolBar*> tbars = toolBars ();
+				for (int i = 0; i < tbars.size (); ++i) tbars[i]->hide ();
+				menu->clear ();
+				QList<QAction*> entries = menuBar ()->actions ();
+				for (int i = 0; i < entries.size (); ++i) {
+					menu->addAction (entries[i]);
+				}
+			}
+		}
+		QObject::childEvent (event);
+	}
+private:
+	QToolButton *menu_button;
+	QMenu *menu;
+	QPointer<KParts::Part> current;
+};
+
+
 RKPreviewBox::RKPreviewBox (const QDomElement &element, RKComponent *parent_component, QWidget *parent_widget) : RKComponent (parent_component, parent_widget) {
 	RK_TRACE (PLUGIN);
 
@@ -77,7 +145,7 @@ RKPreviewBox::RKPreviewBox (const QDomElement &element, RKComponent *parent_comp
 	if (placement == DockedPreview) {
 		RKStandardComponent *uicomp = topmostStandardComponent ();
 		if (uicomp) {
-			QWidget *container = new KVBox ();
+			QWidget *container = new RKXMLGUIPreviewArea (0);
 			RKWorkplace::mainWorkplace ()->registerNamedWindow (idprop, this, container);
 			uicomp->addDockedPreview (container, state, toggle_preview_box->text ());
 
diff --git a/rkward/plugin/rkstandardcomponentgui.cpp b/rkward/plugin/rkstandardcomponentgui.cpp
index 4bb328b..a9c05bd 100644
--- a/rkward/plugin/rkstandardcomponentgui.cpp
+++ b/rkward/plugin/rkstandardcomponentgui.cpp
@@ -188,6 +188,8 @@ void RKStandardComponentGUI::finalize () {
 		tb->setIcon (RKStandardIcons::getIcon (RKStandardIcons::ActionDelete));
 		tb->setProperty ("preview_area", QVariant::fromValue (dummy));
 		connect (tb, SIGNAL (clicked()), this, SLOT (previewCloseButtonClicked()));
+		QWidget *button = previews[i].area->findChild<QWidget *> ("menubutton");
+		if (button) hl->addWidget (button);
 		hl->addStretch ();
 		hl->addWidget (lab);
 		hl->addWidget (tb);