qcam: main_window: Replace start and stop actions with a toggle action

The main window toolbar contains a start button and a stop button. This
allows starting an already started camera (which is currently not
handled and results in an error) or stopping an already stopped camera.
Replace the two actions with a single start/stop toggle action,
preventing UI misuse and reducing confusion.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/src/qcam/main_window.h b/src/qcam/main_window.h
index c623120d..34a090cc 100644
--- a/src/qcam/main_window.h
+++ b/src/qcam/main_window.h
@@ -10,6 +10,7 @@
 #include <memory>
 
 #include <QElapsedTimer>
+#include <QIcon>
 #include <QMainWindow>
 #include <QMutex>
 #include <QObject>
@@ -26,6 +27,7 @@
 
 using namespace libcamera;
 
+class QAction;
 class ViewFinder;
 
 enum {
@@ -49,9 +51,7 @@ private Q_SLOTS:
 	void updateTitle();
 
 	void switchCamera(int index);
-
-	int startCapture();
-	void stopCapture();
+	void toggleCapture(bool start);
 
 	void saveImageAs();
 
@@ -60,11 +60,17 @@ private:
 	std::string chooseCamera();
 	int openCamera();
 
+	int startCapture();
+	void stopCapture();
+
 	void requestComplete(Request *request);
 	void processCapture();
 	int display(FrameBuffer *buffer);
 	void queueRequest(FrameBuffer *buffer);
 
+	QIcon iconPlay_;
+	QIcon iconStop_;
+
 	QString title_;
 	QTimer titleTimer_;
 
@@ -87,6 +93,7 @@ private:
 	QQueue<FrameBuffer *> doneQueue_;
 
 	QToolBar *toolbar_;
+	QAction *startStopAction_;
 	ViewFinder *viewfinder_;
 	std::map<int, std::pair<void *, unsigned int>> mappedBuffers_;
 };