当关闭Windows XP系统时,它会显示一个模态对话框,同时背景会变为灰度。我希望在标签列表中的任何编程语言中实现相同的效果。有人能帮忙吗?
在Winforms中,这个任务很容易完成。你需要一个没有边框的最大化窗口,它的背景是灰色的,并且使用定时器改变其不透明度。当渐隐完成后,你可以显示一个没有边框的对话框,并使用TransparencyKey使其背景透明。这里是一个实现该功能的示例主窗体:
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;
this.BackColor = Color.FromArgb(50, 50, 50);
this.Opacity = 0;
fadeTimer = new Timer { Interval = 15, Enabled = true };
fadeTimer.Tick += new EventHandler(fadeTimer_Tick);
}
void fadeTimer_Tick(object sender, EventArgs e) {
this.Opacity += 0.02;
if (this.Opacity >= 0.70) {
fadeTimer.Enabled = false;
// Fade done, display the overlay
using (var overlay = new Form2()) {
overlay.ShowDialog(this);
this.Close();
}
}
}
Timer fadeTimer;
}
并且对话框:
public partial class Form2 : Form {
public Form2() {
InitializeComponent();
FormBorderStyle = FormBorderStyle.None;
this.TransparencyKey = this.BackColor = Color.Fuchsia;
this.StartPosition = FormStartPosition.Manual;
}
protected override void OnLoad(EventArgs e) {
base.OnLoad(e);
this.Location = new Point((this.Owner.Width - this.Width) / 2, (this.Owner.Height - this.Height) / 2);
}
private void button1_Click(object sender, EventArgs e) {
this.DialogResult = DialogResult.OK;
}
}