qcam: main_window: Document functions and reorganize member data

The qcam application is our reference implementation of a libcamera GUI
application. Document the code of the MainWindow class to make it easier
to follow, and reorganize the member data in logical groups for clarity.
No code change.

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

1 files changed, 14 insertions, 10 deletions

diff --git a/src/qcam/main_window.h b/src/qcam/main_window.h
index 34a090cc..c662a2ef 100644
--- a/src/qcam/main_window.h
+++ b/src/qcam/main_window.h
@@ -57,6 +57,7 @@ private Q_SLOTS:
 
 private:
 	int createToolbars();
+
 	std::string chooseCamera();
 	int openCamera();
 
@@ -68,34 +69,37 @@ private:
 	int display(FrameBuffer *buffer);
 	void queueRequest(FrameBuffer *buffer);
 
+	/* UI elements */
+	QToolBar *toolbar_;
+	QAction *startStopAction_;
+	ViewFinder *viewfinder_;
+
 	QIcon iconPlay_;
 	QIcon iconStop_;
 
 	QString title_;
 	QTimer titleTimer_;
 
+	/* Options */
 	const OptionsParser::Options &options_;
 
+	/* Camera manager, camera, configuration and buffers */
 	CameraManager *cm_;
 	std::shared_ptr<Camera> camera_;
 	FrameBufferAllocator *allocator_;
 
-	bool isCapturing_;
 	std::unique_ptr<CameraConfiguration> config_;
+	std::map<int, std::pair<void *, unsigned int>> mappedBuffers_;
 
-	uint64_t lastBufferTime_;
+	/* Capture state, buffers queue and statistics */
+	bool isCapturing_;
+	QQueue<FrameBuffer *> doneQueue_;
+	QMutex mutex_;	/* Protects doneQueue_ */
 
+	uint64_t lastBufferTime_;
 	QElapsedTimer frameRateInterval_;
 	uint32_t previousFrames_;
 	uint32_t framesCaptured_;
-
-	QMutex mutex_;
-	QQueue<FrameBuffer *> doneQueue_;
-
-	QToolBar *toolbar_;
-	QAction *startStopAction_;
-	ViewFinder *viewfinder_;
-	std::map<int, std::pair<void *, unsigned int>> mappedBuffers_;
 };
 
 #endif /* __QCAM_MAIN_WINDOW__ */