更改分离器高亮/调整线路 [英] Change Splitter Highlighting/Resize Line
本文介绍了更改分离器高亮/调整线路的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我注意到，当我调整在Visual Studio中的分配器线是画在一个坚实的透明的黑色像这样的元素：
I noticed when I resize an element in Visual Studio the Splitter Line is painted in a solid transparent black like this:
的 
然而，在我自己的WinForms应用程序我得到这个调整大小行：
However in my own Winforms application I get this resize line:
的 
我想知道我怎样才能改变这种大小调整线的画？
I am wondering how I can change the painting of this resize line?
推荐答案
如果你看一看的分路器的源代码，你会看到的 DrawSplitHelper 私有方法。
If you take a look at Splitter source code, you will see drawing of the highlight is performed in the DrawSplitHelper private method.
由于分路器方法紧密deppending在控制的私有成员，成员覆盖或处理该用这个方法不是简单地提供了这样的透明的亮点控制的事件。此外，如果你决定要darw了坚实的亮点，你不能因为半色调彰显其控制吸入私有方法的自由无闪烁的绘图。
Since splitter methods are tightly deppending on private members of the control, overriding members or handling events of the control which use this method doesn't provides such transparent highlight simply. Also if you decide to darw a solid highlight, you can not have a filcker-free drawing because of the halftone highlight which the control draws in private methods.
的想法示出一个透明的亮点是基于示出其上不表现激活一个最上面的半透明窗口。你也可以使用 PatBlt 方法绘制用刷子可逆的矩形。
The idea of showing a transparent highlight is based on showing a top-most semi-transparent window which doesn't activate on showing. Also you can use PatBlt method to draw a reversible rectangle using a brush.
当我开始用Splitter.cs并改变它，你在下面看到的图像绘制所需的透明突出显示选项：
As an option I started by Splitter.cs and changed it to draw desired transparent highlight as you see in image below:
![](\"http://i.stack.imgur.com/R2iVT.gif\")
代码
正如我开始Splitter.cs并改变它来绘制所需的透明高亮显示一个选项。我用了一个表格显示透明的亮点。我展示的形式而不激活，作为最顶层，用合适的不透明度。
As an option I started by Splitter.cs and changed it to draw desired transparent highlight. I used a Form to show transparent highlight. I showed the form without activating, as top-most and with a suitable opacity.
也许你可以用更少的代码创建一个分离器，但我更愿意使用的源代码分路器，而不是写我自己的分配器。感谢微软共享源代码的
Probably you can create a splitter using less code, but I preferred to use source code of Splitter instead of writing my own splitter. Thanks to Microsoft for sharing source code.
using System;
using System.ComponentModel;
using System.Drawing;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Drawing.Drawing2D;
using System.Reflection;
[ComVisible(true)]
[DefaultEvent("SplitterMoved")]
[DefaultProperty("Dock")]
[Designer(typeof(MySplitterDesigner))]
public class MySplitter : Control
{
private Point anchor = Point.Empty;
private System.Windows.Forms.BorderStyle borderStyle;
private const int defaultWidth = 3;
private const int DRAW_END = 3;
private const int DRAW_MOVE = 2;
private const int DRAW_START = 1;
private static readonly object EVENT_MOVED = new object();
private static readonly object EVENT_MOVING = new object();
private int initTargetSize;
private int lastDrawSplit = -1;
private int maxSize;
private int minExtra = 25;
private int minSize = 25;
private int splitSize = -1;
private Control splitTarget;
private SplitterMessageFilter splitterMessageFilter;
private int splitterThickness = 3;
[Category("Behavior")]
[Description("Occurs when the splitter is done being moved.")]
public event SplitterEventHandler SplitterMoved
{
add
{
base.Events.AddHandler(EVENT_MOVED, value);
}
remove
{
base.Events.RemoveHandler(EVENT_MOVED, value);
}
}
[Category("Behavior")]
[Description("Occurs when the splitter is being moved.")]
public event SplitterEventHandler SplitterMoving
{
add
{
base.Events.AddHandler(EVENT_MOVING, value);
}
remove
{
base.Events.RemoveHandler(EVENT_MOVING, value);
}
}
HighLight highlight;
public MySplitter()
{
base.SetStyle(ControlStyles.Selectable, false);
this.TabStop = false;
this.minSize = 0x19;
this.minExtra = 0x19;
this.Dock = DockStyle.Left;
highlight = new HighLight();
}
private void ApplySplitPosition()
{
this.SplitPosition = this.splitSize;
}
private SplitData CalcSplitBounds()
{
SplitData data = new SplitData();
Control control = this.FindTarget();
data.target = control;
if (control != null)
{
switch (control.Dock)
{
case DockStyle.Top:
case DockStyle.Bottom:
this.initTargetSize = control.Bounds.Height;
break;
case DockStyle.Left:
case DockStyle.Right:
this.initTargetSize = control.Bounds.Width;
break;
}
Control parentInternal = this.Parent;
Control.ControlCollection controls = parentInternal.Controls;
int count = controls.Count;
int num2 = 0;
int num3 = 0;
for (int i = 0; i < count; i++)
{
Control control3 = controls[i];
if (control3 != control)
{
switch (control3.Dock)
{
case DockStyle.Top:
case DockStyle.Bottom:
num3 += control3.Height;
break;
case DockStyle.Left:
case DockStyle.Right:
num2 += control3.Width;
break;
}
}
}
Size clientSize = parentInternal.ClientSize;
if (this.Horizontal)
{
this.maxSize = (clientSize.Width - num2) - this.minExtra;
}
else
{
this.maxSize = (clientSize.Height - num3) - this.minExtra;
}
data.dockWidth = num2;
data.dockHeight = num3;
}
return data;
}
private Rectangle CalcSplitLine(int splitSize, int minWeight)
{
Rectangle bounds = base.Bounds;
Rectangle rectangle2 = this.splitTarget.Bounds;
switch (this.Dock)
{
case DockStyle.Top:
if (bounds.Height < minWeight)
{
bounds.Height = minWeight;
}
bounds.Y = rectangle2.Y + splitSize;
return bounds;
case DockStyle.Bottom:
if (bounds.Height < minWeight)
{
bounds.Height = minWeight;
}
bounds.Y = ((rectangle2.Y + rectangle2.Height) - splitSize) - bounds.Height;
return bounds;
case DockStyle.Left:
if (bounds.Width < minWeight)
{
bounds.Width = minWeight;
}
bounds.X = rectangle2.X + splitSize;
return bounds;
case DockStyle.Right:
if (bounds.Width < minWeight)
{
bounds.Width = minWeight;
}
bounds.X = ((rectangle2.X + rectangle2.Width) - splitSize) - bounds.Width;
return bounds;
}
return bounds;
}
private int CalcSplitSize()
{
Control control = this.FindTarget();
if (control != null)
{
Rectangle bounds = control.Bounds;
switch (this.Dock)
{
case DockStyle.Top:
case DockStyle.Bottom:
return bounds.Height;
case DockStyle.Left:
case DockStyle.Right:
return bounds.Width;
}
}
return -1;
}
private void DrawSplitBar(int mode)
{
if ((mode != 1) && (this.lastDrawSplit != -1))
{
this.DrawSplitHelper(this.lastDrawSplit);
this.lastDrawSplit = -1;
}
else if ((mode != 1) && (this.lastDrawSplit == -1))
{
return;
}
if (mode != 3)
{
this.DrawSplitHelper(this.splitSize);
this.lastDrawSplit = this.splitSize;
}
else
{
if (this.lastDrawSplit != -1)
{
this.DrawSplitHelper(this.lastDrawSplit);
}
this.lastDrawSplit = -1;
highlight.Hide();
}
Console.WriteLine(mode);
}
private void DrawSplitHelper(int splitSize)
{
if (this.splitTarget != null)
{
Rectangle rectangle = this.CalcSplitLine(splitSize, 3);
var r = this.Parent.RectangleToScreen(rectangle);
if (!highlight.Visible)
highlight.ShowInactiveTopmost();
highlight.Location = r.Location;
highlight.Size = r.Size;
}
}
private Control FindTarget()
{
Control parentInternal = this.Parent;
if (parentInternal != null)
{
Control.ControlCollection controls = parentInternal.Controls;
int count = controls.Count;
DockStyle dock = this.Dock;
for (int i = 0; i < count; i++)
{
Control control2 = controls[i];
if (control2 != this)
{
switch (dock)
{
case DockStyle.Top:
if (control2.Bottom != base.Top)
{
break;
}
return control2;
case DockStyle.Bottom:
if (control2.Top != base.Bottom)
{
break;
}
return control2;
case DockStyle.Left:
if (control2.Right != base.Left)
{
break;
}
return control2;
case DockStyle.Right:
if (control2.Left != base.Right)
{
break;
}
return control2;
}
}
}
}
return null;
}
private int GetSplitSize(int x, int y)
{
int num;
if (this.Horizontal)
num = x - this.anchor.X;
else
num = y - this.anchor.Y;
int num2 = 0;
switch (this.Dock)
{
case DockStyle.Top:
num2 = this.splitTarget.Height + num;
break;
case DockStyle.Bottom:
num2 = this.splitTarget.Height - num;
break;
case DockStyle.Left:
num2 = this.splitTarget.Width + num;
break;
case DockStyle.Right:
num2 = this.splitTarget.Width - num;
break;
}
return Math.Max(Math.Min(num2, this.maxSize), this.minSize);
}
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if ((this.splitTarget != null) && (e.KeyCode == Keys.Escape))
this.SplitEnd(false);
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if ((e.Button == MouseButtons.Left) && (e.Clicks == 1))
this.SplitBegin(e.X, e.Y);
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (this.splitTarget != null)
{
int x = e.X + base.Left;
int y = e.Y + base.Top;
Rectangle rectangle = this.CalcSplitLine(this.GetSplitSize(e.X, e.Y), 0);
int splitX = rectangle.X;
int splitY = rectangle.Y;
this.OnSplitterMoving(new SplitterEventArgs(x, y, splitX, splitY));
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (this.splitTarget != null)
{
Rectangle rectangle = this.CalcSplitLine(this.GetSplitSize(e.X, e.Y), 0);
this.SplitEnd(true);
}
}
protected virtual void OnSplitterMoved(SplitterEventArgs sevent)
{
SplitterEventHandler handler = (SplitterEventHandler)base.Events[EVENT_MOVED];
if (handler != null)
handler(this, sevent);
if (this.splitTarget != null)
this.SplitMove(sevent.SplitX, sevent.SplitY);
}
protected virtual void OnSplitterMoving(SplitterEventArgs sevent)
{
SplitterEventHandler handler = (SplitterEventHandler)base.Events[EVENT_MOVING];
if (handler != null)
handler(this, sevent);
if (this.splitTarget != null)
this.SplitMove(sevent.SplitX, sevent.SplitY);
}
protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
{
if (this.Horizontal)
{
if (width < 1)
width = 3;
this.splitterThickness = width;
}
else
{
if (height < 1)
height = 3;
this.splitterThickness = height;
}
base.SetBoundsCore(x, y, width, height, specified);
}
private void SplitBegin(int x, int y)
{
SplitData data = this.CalcSplitBounds();
if ((data.target != null) && (this.minSize < this.maxSize))
{
this.anchor = new Point(x, y);
this.splitTarget = data.target;
this.splitSize = this.GetSplitSize(x, y);
try
{
if (this.splitterMessageFilter != null)
this.splitterMessageFilter = new SplitterMessageFilter(this);
Application.AddMessageFilter(this.splitterMessageFilter);
}
finally { }
this.Capture = true;
this.DrawSplitBar(1);
}
}
private void SplitEnd(bool accept)
{
this.DrawSplitBar(3);
this.splitTarget = null;
this.Capture = false;
if (this.splitterMessageFilter != null)
{
Application.RemoveMessageFilter(this.splitterMessageFilter);
this.splitterMessageFilter = null;
}
if (accept)
this.ApplySplitPosition();
else if (this.splitSize != this.initTargetSize)
this.SplitPosition = this.initTargetSize;
this.anchor = Point.Empty;
}
private void SplitMove(int x, int y)
{
int splitSize = this.GetSplitSize((x - base.Left) + this.anchor.X, (y - base.Top) + this.anchor.Y);
if (this.splitSize != splitSize)
{
this.splitSize = splitSize;
this.DrawSplitBar(2);
}
}
public override string ToString()
{
string str = base.ToString();
string[] textArray1 = new string[] { str, ", MinExtra: ", this.MinExtra.ToString(CultureInfo.CurrentCulture), ", MinSize: ", this.MinSize.ToString(CultureInfo.CurrentCulture) };
return string.Concat(textArray1);
}
[DefaultValue(0)]
[Category("Appearance")]
[Description("The border type of the control.")]
public System.Windows.Forms.BorderStyle BorderStyle
{
get
{
return this.borderStyle;
}
set
{
if (!IsEnumValid(value, (int)value, 0, 2))
throw new InvalidEnumArgumentException("value", (int)value, typeof(System.Windows.Forms.BorderStyle));
if (this.borderStyle != value)
{
this.borderStyle = value;
base.UpdateStyles();
}
}
}
protected override System.Windows.Forms.CreateParams CreateParams
{
get
{
System.Windows.Forms.CreateParams createParams = base.CreateParams;
createParams.ExStyle &= -513;
createParams.Style &= -8388609;
System.Windows.Forms.BorderStyle borderStyle = this.borderStyle;
if (borderStyle != System.Windows.Forms.BorderStyle.FixedSingle)
{
if (borderStyle == System.Windows.Forms.BorderStyle.Fixed3D)
{
createParams.ExStyle |= 0x200;
}
return createParams;
}
createParams.Style |= 0x800000;
return createParams;
}
}
protected override Cursor DefaultCursor
{
get
{
switch (this.Dock)
{
case DockStyle.Top:
case DockStyle.Bottom:
return Cursors.HSplit;
case DockStyle.Left:
case DockStyle.Right:
return Cursors.VSplit;
}
return base.DefaultCursor;
}
}
protected override System.Windows.Forms.ImeMode DefaultImeMode
{
get
{
return System.Windows.Forms.ImeMode.Disable;
}
}
protected override Size DefaultSize
{
get { return new Size(3, 3); }
}
[Localizable(true), DefaultValue(3)]
public override DockStyle Dock
{
get { return base.Dock; }
set
{
if (((value != DockStyle.Top) && (value != DockStyle.Bottom)) && ((value != DockStyle.Left) && (value != DockStyle.Right)))
throw new ArgumentException("Splitter control must be docked left, right, top, or bottom.");
int splitterThickness = this.splitterThickness;
base.Dock = value;
switch (this.Dock)
{
case DockStyle.Top:
case DockStyle.Bottom:
if (this.splitterThickness == -1)
break;
base.Height = splitterThickness;
return;
case DockStyle.Left:
case DockStyle.Right:
if (this.splitterThickness != -1)
base.Width = splitterThickness;
break;
default:
return;
}
}
}
private bool Horizontal
{
get
{
DockStyle dock = this.Dock;
if (dock != DockStyle.Left)
return (dock == DockStyle.Right);
return true;
}
}
[Category("Behavior")]
[Localizable(true)]
[DefaultValue(25)]
[Description("Specifies the minimum size of the undocked area.")]
public int MinExtra
{
get { return this.minExtra; }
set
{
if (value < 0)
value = 0;
this.minExtra = value;
}
}
[Category("Behavior")]
[Localizable(true)]
[DefaultValue(25)]
[Description("Specifies the minimum size of the control being resized.")]
public int MinSize
{
get { return this.minSize; }
set
{
if (value < 0)
value = 0;
this.minSize = value;
}
}
[Category("Layout")]
[Browsable(false)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
[Description("The current position of the splitter, or -1 if it is not bound to a control.")]
public int SplitPosition
{
get
{
if (this.splitSize == -1)
{
this.splitSize = this.CalcSplitSize();
}
return this.splitSize;
}
set
{
SplitData data = this.CalcSplitBounds();
if (value > this.maxSize)
{
value = this.maxSize;
}
if (value < this.minSize)
{
value = this.minSize;
}
this.splitSize = value;
this.DrawSplitBar(3);
if (data.target == null)
{
this.splitSize = -1;
}
else
{
Rectangle bounds = data.target.Bounds;
switch (this.Dock)
{
case DockStyle.Top:
bounds.Height = value;
break;
case DockStyle.Bottom:
bounds.Y += bounds.Height - this.splitSize;
bounds.Height = value;
break;
case DockStyle.Left:
bounds.Width = value;
break;
case DockStyle.Right:
bounds.X += bounds.Width - this.splitSize;
bounds.Width = value;
break;
}
data.target.Bounds = bounds;
Application.DoEvents();
this.OnSplitterMoved(new SplitterEventArgs(base.Left, base.Top, base.Left + (bounds.Width / 2), base.Top + (bounds.Height / 2)));
}
}
}
private class SplitData
{
public int dockHeight = -1;
public int dockWidth = -1;
internal Control target;
}
private class SplitterMessageFilter : IMessageFilter
{
private MySplitter owner;
public SplitterMessageFilter(MySplitter splitter)
{
this.owner = splitter;
}
public bool PreFilterMessage(ref Message m)
{
if ((m.Msg < 0x100) || (m.Msg > 0x108))
{
return false;
}
if ((m.Msg == 0x100) && (((int)((long)m.WParam)) == 0x1b))
{
this.owner.SplitEnd(false);
}
return true;
}
}
private static bool IsEnumValid(Enum enumValue, int value, int minValue, int maxValue)
{
return ((value >= minValue) && (value <= maxValue));
}
}
public class MySplitterDesigner : ControlDesigner
{
public MySplitterDesigner() { base.AutoResizeHandles = true; }
private void DrawBorder(Graphics graphics)
{
Color white;
Control control = this.Control;
Rectangle clientRectangle = control.ClientRectangle;
if (control.BackColor.GetBrightness() < 0.5)
white = Color.White;
else
white = Color.Black;
using (Pen pen = new Pen(white))
{
pen.DashStyle = DashStyle.Dash;
clientRectangle.Width--;
clientRectangle.Height--;
graphics.DrawRectangle(pen, clientRectangle);
}
}
protected override void OnPaintAdornments(PaintEventArgs pe)
{
base.OnPaintAdornments(pe);
if (((MySplitter)base.Component).BorderStyle == BorderStyle.None)
this.DrawBorder(pe.Graphics);
}
protected override void WndProc(ref Message m)
{
if (m.Msg == 0x47)
this.Control.Invalidate();
base.WndProc(ref m);
}
}
这里是重头戏形式
public class HighLight : Form
{
public HighLight()
{
FormBorderStyle = FormBorderStyle.None;
BackColor = Color.Black;
Opacity = 0;
ShowInTaskbar = false;
StartPosition = FormStartPosition.Manual;
}
protected override void OnDeactivate(EventArgs e)
{
base.OnDeactivate(e);
this.Hide();
}
private const int SW_SHOWNOACTIVATE = 4;
private const int HWND_TOPMOST = -1;
private const uint SWP_NOACTIVATE = 0x0010;
[DllImport("user32.dll", EntryPoint = "SetWindowPos")]
static extern bool SetWindowPos(int hWnd, int hWndInsertAfter,
int X, int Y, int cx, int cy, uint uFlags);
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
public void ShowInactiveTopmost()
{
ShowWindow(this.Handle, SW_SHOWNOACTIVATE);
SetWindowPos(this.Handle.ToInt32(), HWND_TOPMOST,
this.Left, this.Top, this.Width, this.Height,
SWP_NOACTIVATE);
this.Opacity = 0.3;
}
}
这篇关于更改分离器高亮/调整线路的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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