Cleaned a bit and added a widget example

src/MainWindow.cpp

@@ -278,7 +278,7 @@ void MainWindow::initUI()
     /* Setup plugins interfaces */
     QList<CutterPlugin *> plugins = core->getCutterPlugins();
     for (auto plugin : plugins) {
-        CutterDockWidget *pluginDock = plugin->setupInterface(this);
+        QDockWidget *pluginDock = plugin->setupInterface(this);
         if (pluginDock) {
             tabifyDockWidget(dashboardDock, pluginDock);
         }

src/plugins/CutterPlugin.h

@@ -12,7 +12,7 @@ class CutterPlugin
 public:
     virtual ~CutterPlugin() {}
     virtual void setupPlugin(CutterCore *core) = 0;
-    virtual CutterDockWidget* setupInterface(MainWindow *main, QAction *action = nullptr) = 0;
+    virtual QDockWidget *setupInterface(MainWindow *main, QAction *action = nullptr) = 0;
 
     QString name;
     QString description;

src/plugins/CutterPythonPlugin.cpp

@@ -93,7 +93,7 @@ QString CutterPythonPlugin::getAttributeFromPython(const char *attribute)
     return result;
 }
 
-CutterDockWidget* CutterPythonPlugin::setupInterface(MainWindow *main, QAction *action)
+QDockWidget *CutterPythonPlugin::setupInterface(MainWindow *main, QAction *action)
 {
     Q_UNUSED(main)
     Q_UNUSED(action)
@@ -116,9 +116,13 @@ CutterDockWidget* CutterPythonPlugin::setupInterface(MainWindow *main, QAction *
     }
 
     auto dockWidget = reinterpret_cast<QDockWidget *>(PyLong_AsLong(pWidget));
-    printf("plugin gave me this: %s\n", dockWidget->objectName().toLocal8Bit().constData());
+    if (!dockWidget) {
+        qWarning() << "Cannot instantiate QDockWidget.";
+	    Python()->saveThread();
+	    return nullptr;
+    }
 
     Python()->saveThread();
 
-    return nullptr;
+    return dockWidget;
 }

src/plugins/CutterPythonPlugin.h

@@ -10,7 +10,7 @@ public:
     CutterPythonPlugin(PyObject* pluginModule);
     ~CutterPythonPlugin();
     void setupPlugin(CutterCore *core);
-    CutterDockWidget* setupInterface(MainWindow *main, QAction *action);
+    QDockWidget *setupInterface(MainWindow *main, QAction *action);
 
 private:
     PyObject *pluginModule = nullptr;

src/plugins/pluginSample.py

@@ -1,31 +1,51 @@
 import cutter
 from cutter_plugin import CutterPlugin
-from PySide2 import QtCore, QtWidgets
-import shiboken2
+from PySide2 import QtWidgets
+from PySide2.QtCore import QObject, SIGNAL, Qt
+from PySide2.QtGui import QFont
 
 
 class CutterSamplePlugin(CutterPlugin):
     name = "SamplePlugin"
     description = "A sample plugin written in python."
     version = "1.0"
-    author = "xarkes"
-
-    def setupPlugin(self):
-        self.app = QtCore.QCoreApplication.instance()
+    author = "xarkes and thestr4ng3r :-P"
 
     def setupInterface(self):
-        print('Creating the dock widget...')
-        main_window = None
-        for widget in QtWidgets.QApplication.topLevelWidgets():
-            if widget.objectName() == "MainWindow":
-                main_window = widget
-        dock_widget = QtWidgets.QDockWidget(main_window)
+        super().setupInterface()
+
+        # Create dock widget and content widget
+        dock_widget = QtWidgets.QDockWidget(self.main)
         dock_widget.setObjectName("FancyDockWidgetFromCoolPlugin")
-        dock_widget.setWindowTitle('Test Widget')
-        print(main_window, dock_widget)
-        ptr = shiboken2.getCppPointer(dock_widget)[0]
-        print(ptr)
-        return ptr
+        dock_widget.setWindowTitle("Test Widget")
+        content = QtWidgets.QWidget()
+        dock_widget.setWidget(content)
+
+        # Create layout and label
+        layout = QtWidgets.QVBoxLayout(dock_widget)
+        content.setLayout(layout)
+        self.text = QtWidgets.QLabel(content)
+        self.text.setSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
+        layout.addWidget(self.text)
+
+        button = QtWidgets.QPushButton(content)
+        button.setText("Want a fortune?")
+        button.setSizePolicy(QtWidgets.QSizePolicy.Maximum, QtWidgets.QSizePolicy.Maximum)
+        button.setMaximumHeight(50)
+        button.setMaximumWidth(200)
+        layout.addWidget(button)
+        layout.setAlignment(button, Qt.AlignHCenter)
+
+        # TODO How to access CutterCore::seekChanged?
+        # QObject.connect(cutter.core() ?, cutter.???)
+        QObject.connect(button, SIGNAL("clicked()"), self.on_button_clicked)
+
+        return self.makeCppPointer(dock_widget)
+
+
+    def on_button_clicked(self):
+        res = cutter.cmd("?E `fo`")
+        self.text.setText(res)
 
 
 # Instantiate our plugin

src/python/cutter_plugin.py

@@ -1,17 +1,25 @@
-from abc import ABC, abstractmethod
+from PySide2 import QtCore, QtWidgets
+import shiboken2
 
 
-class CutterPlugin(ABC):
+class CutterPlugin(object):
     name = ''
     description = ''
     version = ''
     author = ''
 
-    @abstractmethod
     def setupPlugin(self):
-        pass
+        self.app = QtCore.QCoreApplication.instance()
 
-    @abstractmethod
     def setupInterface(self):
-        pass
+        for widget in QtWidgets.QApplication.topLevelWidgets():
+            if widget.objectName() == "MainWindow":
+                self.main = widget
+                break
+
+    def makeCppPointer(self, widget):
+        ptr = shiboken2.getCppPointer(widget)[0]
+        return ptr
+        
+