qcam: Use QDialog for selection of cameras at startup

Currently we use QInputDialog convenience dialogs to allow the user to
select a camera. This doesn't allow adding of more information (such as
camera location, model etc).

Create a QDialog with a QFormLayout that shows a QComboBox with camera
Ids. Use a QDialogButtonBox to provide buttons for accepting and
cancelling the action.

The CameraSelectorDialog is only initialized the first time when the
MainWindow is created.

From this commit we cease to auto select the camera if only a single
camera is available to libcamera. We would always display the selection
dialog with the exception being that being if the camera is supplied on
the command line.

Signed-off-by: Utkarsh Tiwari <utkarsh02t@gmail.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/qcam/main_window.h b/src/qcam/main_window.h
index fc70920f..e17c8010 100644
--- a/src/qcam/main_window.h
+++ b/src/qcam/main_window.h
@@ -33,6 +33,7 @@
 class QAction;
 class QComboBox;
 
+class CameraSelectorDialog;
 class Image;
 class HotplugEvent;
 
@@ -99,6 +100,8 @@ private:
 	QString title_;
 	QTimer titleTimer_;
 
+	CameraSelectorDialog *cameraSelectorDialog_;
+
 	/* Options */
 	const OptionsParser::Options &options_;