如何在c＃中淡出和淡出面板？

Question

有没有我可以淡化一个小组？

每当我点击按钮时，我想在菜单中淡化整个面板。

任何帮助？

Answer 1

以下是一个示例，其中包含Panel内容的屏幕截图，然后将其淡化为Panel或其Parent的{​​{1}}。 ：

BackColor

class FadePanel : Panel { DrawPanel Layer = new DrawPanel(); Bitmap image = null; float alpha = 0; float delta = 1; Timer timer = new Timer() { Interval = 25 }; public bool FadeToParent { get; set; } public Color FadeColor { get; set; } public bool StaticContent { get; set; } public bool Hidden { get; private set; } public FadePanel() { DoubleBuffered = true; Layer.Size = Size.Empty; Layer.Parent = this; Layer.BackColor = Color.Transparent; Layer.Paint += Layer_Paint; BackColor = Color.DodgerBlue; FadeToParent = false; Color FadeColor = BackColor; Hidden = false; StaticContent = true; Layer.BackgroundImageLayout = ImageLayout.None; timer.Tick += timer_Tick; } void Layer_Paint(object sender, PaintEventArgs e) { if (alpha >= 0 && alpha <= 255) { using (SolidBrush brush = new SolidBrush(Color.FromArgb((int)alpha, FadeColor))) e.Graphics.FillRectangle(brush, Layer.ClientRectangle); } } public void CaptureLayer() { if (image == null) image = new Bitmap(ClientSize.Width, ClientSize.Height); DrawToBitmap(image, ClientRectangle); Layer.BackgroundImage = image; } public void FadeOut(int ms) { alpha = 0; delta = 256f / ms * timer.Interval; Fade(delta); } public void FadeIn(int ms) { alpha = 255; delta = -256f / ms * timer.Interval; Fade(delta); } void Fade(float delta) { if (image == null || !StaticContent) CaptureLayer(); BringToFront(); FadeColor = FadeToParent ? Parent.BackColor : FadeColor; Layer.BringToFront(); Layer.Size = ClientSize; timer.Start(); } void timer_Tick(object sender, EventArgs e) { alpha += delta; if (alpha >= 255 || alpha <= 0) { alpha = delta > 0 ? 255 : 0; timer.Stop(); if (delta < 0) BringToFront(); else SendToBack(); Hidden = delta > 0; Layer.Size = delta > 0 ? ClientSize : Size.Empty; } Layer.Invalidate(); } } 助手DoubleBuffered子类：

Panel