/// <summary>
/// 构造一个加载遮罩层
/// </summary>
/// <param name="rectLayer">遮罩层坐标及尺寸</param>
/// <param name="opacity">由一个0~1的double值表示的透明度</param>
/// <param name="progressBar">
/// 指示遮罩层是否包含一个进度条，在另一线程中调用 <see cref="UpdateProgress"/>更新进度条
/// </param>
/// <param name="customCursor">指定自定义的光标</param>
/// <param name="newUiThread">指示遮罩层是否在独立的UI线程执行</param>
public LoadingLayer(
Rectangle rectLayer,
double opacity = .5D,
bool progressBar = false,
Cursor customCursor = null,
bool newUiThread = false)
{
if (newUiThread)
{
_formThread = new Thread(() =>
{
CreateForm(rectLayer, opacity, progressBar, customCursor);
_circle.Switch();
_form.TopMost = true;
Application.Run(_form);
})
{
IsBackground = true
};
_formThread.SetApartmentState(ApartmentState.STA);
return;
}
CreateForm(rectLayer, opacity, progressBar, customCursor);
}
/// <summary>
/// 显示遮罩层，此方法将阻塞当前调用线程，
/// 调用前请确保在另一线程中调用了Close()
/// </summary>
public void Show()
{
if (_form.InvokeRequired)
{
_form.BeginInvoke(new MethodInvoker(() =>
{
_circle.Switch();
_form.ShowDialog();
}));
}
else
{
_circle.Switch();
_form.ShowDialog();
}
}