Method draw

samples/CaptureBasic/src/CaptureBasicApp.cpp:99–261

}

void CaptureBasicApp::draw()
{
	gl::clear( Color( 0.1f, 0.1f, 0.1f ) );
	gl::enableAlphaBlending();

	// Draw video texture centered and scaled to fit window
	if( mTexture ) {
		Rectf destRect = Rectf( mTexture->getBounds() ).getCenteredFit( getWindowBounds(), true );
		gl::draw( mTexture, destRect );
	}

	// Draw ImGui
	if( mShowUI ) {
		ImGui::Begin( "Video Capture Control" );

		// Device selection or "No devices" message
		if( ! mDevices.empty() ) {
			// Ensure selected index is valid
			if( mSelectedDeviceIndex >= (int)mDevices.size() ) {
				mSelectedDeviceIndex = 0;
			}

			// Device dropdown
			if( ImGui::BeginCombo( "Camera Device", mDevices[mSelectedDeviceIndex]->getName().c_str() ) ) {
				for( int i = 0; i < mDevices.size(); i++ ) {
					bool isSelected = ( mSelectedDeviceIndex == i );
					if( ImGui::Selectable( mDevices[i]->getName().c_str(), isSelected ) ) {
						if( mSelectedDeviceIndex != i ) {
							mSelectedDeviceIndex = i;
							updateModes();
							// Reset to auto mode when switching devices
							mSelectedModeIndex = -1;
							setupCapture( mDevices[i] );
						}
					}
					if( isSelected ) {
						ImGui::SetItemDefaultFocus();
					}
				}
				ImGui::EndCombo();
			}
		}
		else {
			// Show message when no devices available
			ImGui::TextColored( ImVec4( 1.0f, 0.6f, 0.0f, 1.0f ), "No Capture Devices Found" );
		}


		// Mode selection dropdown - only show when we have devices
		if( ! mDevices.empty() && ! mCurrentModes.empty() ) {
			// Determine display text for current mode
			string modeDescription;
			if( mSelectedModeIndex == -1 ) {
				// Auto mode - try to match current resolution with available modes
				if( mCapture ) {
					int currentWidth = mCapture->getWidth();
					int currentHeight = mCapture->getHeight();