OZ++ Sample: VideoDeviceEnumerator |
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* VideoDeviceEnumerator.cpp
*
*****************************************************************************/
//2019/01/03
#include <opencv2/stitching.hpp>
#include <oz++/motif/RowColumn.h>
#include <oz++/motif/PushButton.h>
#include <oz++/motif/LabeledVideoDeviceComboBox.h>
#include <oz++/opencv/OpenCVVideoCaptureView.h>
#include <oz++/opencv/OpenCVImageView.h>
#include <oz++/opencv/OpenCVScaleComboBox.h>
#include <oz++/opencv/OpenCVScrolledImageView.h>
namespace OZ {
class MainView :public OpenCVVideoCaptureView {
private:
//Inner class starts.
class VideoImageView: public OpenCVImageView {
private:
cv::Mat image;
cv::Mat scaledImage;
public:
void display()
{
show(scaledImage);
}
public:
VideoImageView(View* parent, const char* name, Args& args)
:OpenCVImageView(parent, name, args)
{
}
void render(cv::Mat& frame, int scalingRatio)
{
image = frame;
rescale(image, scaledImage, scalingRatio);
invalidate();
refresh();
}
};
//Inner class ends
private:
SmartPtr<VideoImageView> videoImage;
SmartPtr<RowColumn> controlPane;
int imageScalingRatio;
SmartPtr<OpenCVScaleComboBox> scaleComboBox;
int deviceIndex;
SmartPtr<LabeledVideoDeviceComboBox> videoDevice;
SmartPtr<PushButton> startButton;
SmartPtr<PushButton> stopButton;
void resize(Dimension w, Dimension h)
{
int CP_WIDTH = 200;
w = w- CP_WIDTH;
if (videoImage && controlPane) {
videoImage ->resize(0, 0, w, h, 0);
controlPane ->reshape(w+2, 0, CP_WIDTH-4, h);
}
}
void scaleChanged(Action& action)
{
int val = scaleComboBox->getScale();
if (val > 0 && imageScalingRatio != val) {
imageScalingRatio = val;
printf("ScalingRatio %d\n", val);
}
}
void videoDeviceChanged(Action& action)
{
deviceIndex = videoDevice->getSelectedPosition();
printf("deviceIndex %d\n", deviceIndex);
}
void start(Action& action)
{
setDeviceIndex(deviceIndex);
startCapture();
printf("StartCapture: %d\n", deviceIndex);
}
void stop(Action& action)
{
stopCapture();
printf("StopCapture\n");
}
public:
MainView(OpenCVApplication& applet, const char* name, Args& args)
:OpenCVVideoCaptureView(applet, name, args)
,imageScalingRatio(100)
,deviceIndex(0)
{
try {
BulletinBoard* bboard = getBulletinBoard();
Args ar;
ar.reset();
videoImage = new VideoImageView(bboard, "", ar);
ar.reset();
controlPane = new RowColumn(bboard, "", ar);
const char* defaultScale = "100%";
ar.reset();
CompoundString scaler("Scale");
ar.set(XmNlabelString, scaler);
ar.set(XmNdefaultScale, defaultScale);
scaleComboBox = new OpenCVScaleComboBox(controlPane, "", ar);
scaleComboBox->addCallback(XmNselectionCallback, this,
(Callback)&MainView::scaleChanged, NULL);
ar.reset();
CompoundString device("VideoDevice");
ar.set(XmNlabelString, device);
videoDevice = new LabeledVideoDeviceComboBox(controlPane, "", ar);
videoDevice->addCallback(XmNselectionCallback, this,
(Callback)&MainView::videoDeviceChanged, NULL);
ar.reset();
startButton = new PushButton(controlPane, "Start Capture", ar);
startButton->addCallback(XmNactivateCallback, this,
(Callback)&MainView::start, NULL);
ar.reset();
stopButton = new PushButton(controlPane, "Stop Capture", ar);
stopButton->addCallback(XmNactivateCallback, this,
(Callback)&MainView::stop, NULL);
sendConfigureEvent();
} catch(OZ::Exception& ex) {
caught(ex);
}
}
virtual void render()
{
try {
cv::Mat frame;
if (readVideoFrame(frame)) {
if (videoImage) {
videoImage->render(frame, imageScalingRatio);
}
}
} catch (...) {
}
}
};
}
//
int main(int argc, char** argv)
{
try {
const char* appclass = argv[0];
OpenCVApplication applet(appclass, argc, argv);
Args args;
args.set(XmNwidth, 620);
args.set(XmNheight, 400);
//args.set(XmNvideoDeviceIndex, 0);
args.set(XmNcaptureAutoStart, false);
MainView view(applet, argv[0], args);
view.realize();
applet.run(&view, 100); //20 msec
} catch (OZ::Exception& ex) {
caught(ex);
}
return 0;
}