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Merge pull request #1769 from studentmain/master

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[Fix] QRCodeSplashForm.cs无法在窗体设计工具中打开
This commit is contained in:
Allen Zhu
2018-03-29 19:53:25 +08:00
committed by GitHub
parent 78e46188f6 81dcad5df5
commit 7fb75f27b1
1 changed files with 65 additions and 84 deletions
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shadowsocks-csharp/View/QRCodeSplashForm.cs
+65 -84
View File
@@ -12,12 +12,13 @@ using System.Diagnostics;
namespace Shadowsocks.View
{
public class QRCodeSplashForm : PerPixelAlphaForm
public class QRCodeSplashForm : Form
{
public Rectangle TargetRect;
public QRCodeSplashForm()
{
FormBorderStyle = FormBorderStyle.None;
this.Load += QRCodeSplashForm_Load;
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.BackColor = System.Drawing.Color.White;
@@ -69,16 +70,6 @@ namespace Shadowsocks.View
brush = new SolidBrush(Color.FromArgb(30, Color.Red));
}
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x00080000; // This form has to have the WS_EX_LAYERED extended style
return cp;
}
}
void timer_Tick(object sender, EventArgs e)
{
double percent = (double)sw.ElapsedMilliseconds / 1000.0 / (double)ANIMATION_TIME;
@@ -148,6 +139,69 @@ namespace Shadowsocks.View
flashStep++;
}
}
// PerPixelAlphaForm.cs
// http://www.codeproject.com/Articles/1822/Per-Pixel-Alpha-Blend-in-C
// Rui Lopes
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x00080000; // This form has to have the WS_EX_LAYERED extended style
return cp;
}
}
public void SetBitmap(Bitmap bitmap)
{
SetBitmap(bitmap, 255);
}
/// <para>Changes the current bitmap with a custom opacity level. Here is where all happens!</para>
public void SetBitmap(Bitmap bitmap, byte opacity)
{
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
throw new ApplicationException("The bitmap must be 32ppp with alpha-channel.");
// The idea of this is very simple,
// 1. Create a compatible DC with screen;
// 2. Select the bitmap with 32bpp with alpha-channel in the compatible DC;
// 3. Call the UpdateLayeredWindow.
IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
IntPtr memDc = Win32.CreateCompatibleDC(screenDc);
IntPtr hBitmap = IntPtr.Zero;
IntPtr oldBitmap = IntPtr.Zero;
try
{
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0)); // grab a GDI handle from this GDI+ bitmap
oldBitmap = Win32.SelectObject(memDc, hBitmap);
Win32.Size size = new Win32.Size(bitmap.Width, bitmap.Height);
Win32.Point pointSource = new Win32.Point(0, 0);
Win32.Point topPos = new Win32.Point(Left, Top);
Win32.BLENDFUNCTION blend = new Win32.BLENDFUNCTION();
blend.BlendOp = Win32.AC_SRC_OVER;
blend.BlendFlags = 0;
blend.SourceConstantAlpha = opacity;
blend.AlphaFormat = Win32.AC_SRC_ALPHA;
Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
}
finally
{
Win32.ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
Win32.SelectObject(memDc, oldBitmap);
//Windows.DeleteObject(hBitmap); // The documentation says that we have to use the Windows.DeleteObject... but since there is no such method I use the normal DeleteObject from Win32 GDI and it's working fine without any resource leak.
Win32.DeleteObject(hBitmap);
}
Win32.DeleteDC(memDc);
}
}
}
@@ -224,77 +278,4 @@ namespace Shadowsocks.View
[DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]
public static extern int DeleteObject(IntPtr hObject);
}
public class PerPixelAlphaForm : Form
{
// http://www.codeproject.com/Articles/1822/Per-Pixel-Alpha-Blend-in-C
// Rui Lopes
public PerPixelAlphaForm()
{
// This form should not have a border or else Windows will clip it.
FormBorderStyle = FormBorderStyle.None;
}
public void SetBitmap(Bitmap bitmap)
{
SetBitmap(bitmap, 255);
}
/// <para>Changes the current bitmap with a custom opacity level. Here is where all happens!</para>
public void SetBitmap(Bitmap bitmap, byte opacity)
{
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
throw new ApplicationException("The bitmap must be 32ppp with alpha-channel.");
// The idea of this is very simple,
// 1. Create a compatible DC with screen;
// 2. Select the bitmap with 32bpp with alpha-channel in the compatible DC;
// 3. Call the UpdateLayeredWindow.
IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
IntPtr memDc = Win32.CreateCompatibleDC(screenDc);
IntPtr hBitmap = IntPtr.Zero;
IntPtr oldBitmap = IntPtr.Zero;
try
{
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0)); // grab a GDI handle from this GDI+ bitmap
oldBitmap = Win32.SelectObject(memDc, hBitmap);
Win32.Size size = new Win32.Size(bitmap.Width, bitmap.Height);
Win32.Point pointSource = new Win32.Point(0, 0);
Win32.Point topPos = new Win32.Point(Left, Top);
Win32.BLENDFUNCTION blend = new Win32.BLENDFUNCTION();
blend.BlendOp = Win32.AC_SRC_OVER;
blend.BlendFlags = 0;
blend.SourceConstantAlpha = opacity;
blend.AlphaFormat = Win32.AC_SRC_ALPHA;
Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
}
finally
{
Win32.ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
Win32.SelectObject(memDc, oldBitmap);
//Windows.DeleteObject(hBitmap); // The documentation says that we have to use the Windows.DeleteObject... but since there is no such method I use the normal DeleteObject from Win32 GDI and it's working fine without any resource leak.
Win32.DeleteObject(hBitmap);
}
Win32.DeleteDC(memDc);
}
}
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x00080000; // This form has to have the WS_EX_LAYERED extended style
return cp;
}
}
}
}