private async void startLiveViewBtn_Click(object sender, EventArgs e)
{
if (!isPreviewRunning_)
{
if (previewWindow_ == null)
{
previewWindow_ = new PreviewWindow();
previewWindow_.FormClosing += new FormClosingEventHandler(
// Perform click will cause calling startLiveViewBtn() method, which stop preview and clean resources
(object s, FormClosingEventArgs args) => startLiveViewBtn.PerformClick()
);
}
liveViewService_.NvrPreviewSettings = new NvrPreviewSettings {
PreviewHandleMode = (PreviewHandleType)comboBox5.SelectedIndex,
LinkMode = (PreviewLinkModeType)comboBox2.SelectedIndex,
StreamType = (uint)numericUpDown1.Value,
DisplayBufNum = (uint)numericUpDown2.Value,
IsBlocked = checkBox2.Checked,
IsPassbackRecord = checkBox1.Checked,
PlayerBufSize = parseBufferSize(textBox5.Text),
PreviewMode = (PreviewModeType)comboBox4.SelectedIndex,
PreviewQuality = (PreviewQualityType)comboBox3.SelectedIndex
};
try {
liveViewService_.StartLiveView(previewWindow_.GetLiveViewHandle());
} catch (Exception) {
return;
}
startLiveViewBtn.Text = "Stop Live View";
isPreviewRunning_ = true;
userInfoGB.Enabled = !isPreviewRunning_;
previewSettingsGB.Enabled = !isPreviewRunning_;
previewWindow_.Show(this);
}
else
{
await stopLiveViewAsync();
isPreviewRunning_ = false;
startLiveViewBtn.Text = "Start Live View";
userInfoGB.Enabled = !isPreviewRunning_;
previewSettingsGB.Enabled = !isPreviewRunning_;
previewWindow_?.ResetLiveView();
previewWindow_?.Dispose();
previewWindow_ = null;
}
}