Qt5: set the parent view of a QPluginWidget's view

For the correct integration of a QPluginWidget in a parent QWidget, with
this commit the parent QWidget's Nitpicker view is made the parent view of
the plugin's Nitpicker view.

Fixes #1173.

repos/libports/include/qt5/qpluginwidget/qpluginwidget.h

@@ -45,6 +45,7 @@ class PluginStarter : public QThread
 		QByteArray _args;
 		int _max_width;
 		int _max_height;
+		Nitpicker::View_capability _parent_view;
 
 		Loader::Connection *_pc;
 		enum Plugin_loading_state _plugin_loading_state;
@@ -60,7 +61,8 @@ class PluginStarter : public QThread
 
 	public:
 		PluginStarter(QUrl plugin_url, QString &args,
-					  int max_width, int max_height);
+					  int max_width, int max_height,
+					  Nitpicker::View_capability parent_view);
 
 		void run();
 		enum Plugin_loading_state plugin_loading_state() { return _plugin_loading_state; }
@@ -82,6 +84,10 @@ class QPluginWidget : public QNitpickerViewWidget
 		QString _plugin_loading_error_string;
 
 		PluginStarter *_plugin_starter;
+		bool _plugin_starter_started;
+
+		QUrl _plugin_url;
+		QString _plugin_args;
 
 		int _max_width;
 		int _max_height;
@@ -95,6 +101,7 @@ class QPluginWidget : public QNitpickerViewWidget
 
 	protected:
 		virtual void paintEvent(QPaintEvent *event);
+		virtual void showEvent(QShowEvent *event);
 
 	protected slots:
 		void pluginStartFinished();

repos/libports/lib/mk/qt5_qpluginwidget.mk

@@ -7,4 +7,4 @@ HEADERS += qpluginwidget.h
 vpath %.h $(REP_DIR)/include/qt5/qpluginwidget
 vpath %.cpp $(REP_DIR)/src/lib/qt5/qpluginwidget
 
-LIBS += qt5_gui qt5_widgets qt5_network qt5_qnitpickerviewwidget qt5_core libc zlib
+LIBS += qt5_gui qt5_widgets qt5_network qt5_qnitpickerviewwidget qt5_core qt5_qpa_nitpicker libc qoost zlib

repos/libports/src/lib/qt5/qpluginwidget/qpluginwidget.cpp

@@ -14,9 +14,8 @@
 #include <zlib.h>
 
 #include <QtGui>
-#if 0
-#include <private/qwindowsurface_qws_p.h>
-#endif
+
+#include <qnitpickerplatformwindow.h>
 
 #include <qpluginwidget/qpluginwidget.h>
 
@@ -88,11 +87,13 @@ class Signal_wait_thread : public QThread
 
 
 PluginStarter::PluginStarter(QUrl plugin_url, QString &args,
-                             int max_width, int max_height)
+                             int max_width, int max_height,
+                             Nitpicker::View_capability parent_view)
 : _plugin_url(plugin_url),
   _args(args.toLatin1()),
   _max_width(max_width),
   _max_height(max_height),
+  _parent_view(parent_view),
   _pc(0),
   _plugin_loading_state(LOADING),
   _qnam(0),
@@ -191,6 +192,7 @@ void PluginStarter::_start_plugin(QString &file_name, QByteArray const &file_buf
 
 	_pc->view_ready_sigh(sig_rec.manage(&sig_ctx));
 	_pc->constrain_geometry(_max_width, _max_height);
+	_pc->parent_view(_parent_view);
 	_pc->start("init", "init");
 
 	Timed_semaphore view_ready_semaphore;
@@ -289,6 +291,9 @@ QPluginWidget::QPluginWidget(QWidget *parent, QUrl plugin_url, QString &args,
 	QNitpickerViewWidget(parent),
 	_plugin_loading_state(LOADING),
 	_plugin_starter(0),
+	_plugin_starter_started(false),
+	_plugin_url(plugin_url),
+	_plugin_args(args),
 	_max_width(max_width),
 	_max_height(max_height)
 {
@@ -302,11 +307,6 @@ QPluginWidget::QPluginWidget(QWidget *parent, QUrl plugin_url, QString &args,
 		_last->cleanup();
 		_last = this;
 	}
-
-	_plugin_starter = new PluginStarter(plugin_url, args, max_width, max_height);
-	_plugin_starter->moveToThread(_plugin_starter);
-	connect(_plugin_starter, SIGNAL(finished()), this, SLOT(pluginStartFinished()));
-	_plugin_starter->start();
 }
 
 
@@ -372,6 +372,29 @@ void QPluginWidget::paintEvent(QPaintEvent *event)
 }
 
 
+void QPluginWidget::showEvent(QShowEvent *event)
+{
+	/* only now do we know the parent widget for sure */
+
+	if (!_plugin_starter_started) {
+
+		QNitpickerPlatformWindow *platform_window =
+			dynamic_cast<QNitpickerPlatformWindow*>(window()->windowHandle()->handle());
+
+		_plugin_starter = new PluginStarter(_plugin_url, _plugin_args,
+		                                    _max_width, _max_height,
+		                                    platform_window->view_cap());
+		_plugin_starter->moveToThread(_plugin_starter);
+		connect(_plugin_starter, SIGNAL(finished()), this, SLOT(pluginStartFinished()));
+		_plugin_starter->start();
+
+		_plugin_starter_started = true;
+	}
+
+	QNitpickerViewWidget::showEvent(event);
+}
+
+
 void QPluginWidget::pluginStartFinished()
 {
 	_plugin_loading_state = _plugin_starter->plugin_loading_state();