C# 如何让treeview 控件中的选中节点闪烁？
C# 如何让treeview 控件中的选中节点闪烁？ --------------------编程问答-------------------- 给选中节点加图片,图片闪节点就闪 --------------------编程问答-------------------- winform的么？是的话可以写个例子给你看看 --------------------编程问答-------------------- 继承一个TreeView用一个Timer然后自绘选中的节点。 --------------------编程问答--------------------
这个小程序实现代码如下：
--------------------编程问答-------------------- if (blinkRate <= 0 || blinkRate > 1000) --------------------编程问答-------------------- 改一改文字（例如改成空白），通过定时器在三分之一秒钟再改回来。反复几次之后，结束这个过程。
using System;
using System.Drawing;
using System.Windows.Forms;
namespace BlinkTreeNodeDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
Load += new EventHandler(Form1_Load);
}
private void Form1_Load(object sender, EventArgs e)
{
SetupBlinkTreeView();
}
private void SetupBlinkTreeView()
{
while (!this.IsHandleCreated) ;
//每秒闪烁一次
BlinkTreeNodeRenderer bt1 = new BlinkTreeNodeRenderer(treeView1, 1);
//每秒闪烁10次
BlinkTreeNodeRenderer bt2 = new BlinkTreeNodeRenderer(treeView2, 10);
//每秒闪烁25次
BlinkTreeNodeRenderer bt3 = new BlinkTreeNodeRenderer(treeView3, 25);
}
}
public class BlinkTreeNodeRenderer
{
private TreeView treeView;
private System.Threading.Thread th;
private int blinkRate;
private bool isBlink = false;
public BlinkTreeNodeRenderer(TreeView treeView)
{
Initialize(treeView, 1);
}
public BlinkTreeNodeRenderer(TreeView treeView, int blinkRate)
{
Initialize(treeView, blinkRate);
}
private void Initialize(TreeView treeView, int blinkRate)
{
if (blinkRate < 0 || blinkRate > 1000)
{
throw new ArgumentOutOfRangeException("blinkRate", "blinkRate应大于0且小于1000");
}
this.treeView = treeView;
this.blinkRate = blinkRate;
this.treeView.HideSelection = false;
this.treeView.DrawMode = TreeViewDrawMode.OwnerDrawText;
this.treeView.DrawNode += new DrawTreeNodeEventHandler(treeView_DrawNode);
this.treeView.Disposed += new EventHandler(treeView_Disposed);
this.th = new System.Threading.Thread(new System.Threading.ThreadStart(Blink));
this.th.IsBackground = true;
this.th.Start();
}
//一定的时间间隔更改isBlink的值，并使当前选择节点区域无效（不用对整个控件无效），发送绘制消息
private void Blink()
{
int sleepTime = 1000 / blinkRate;
while (true)
{
System.Threading.Thread.Sleep(sleepTime);
isBlink = !isBlink;
treeView.BeginInvoke(new MethodInvoker(delegate()
{
if (treeView.SelectedNode != null && treeView.Focused)
{
treeView.Invalidate(treeView.SelectedNode.Bounds);
}
}));
}
}
private void treeView_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
//设置为false由用户绘制而非操作系统绘制
e.DrawDefault = false;
if ((e.State & TreeNodeStates.Selected) != 0 || (e.State & TreeNodeStates.Focused) != 0)
{
//判断节点是否已选择或者已获得焦点，如果是true则绘制高亮显示、焦点框
e.Graphics.FillRectangle(new SolidBrush(SystemColors.Highlight), e.Bounds);
using (Pen focusedPen = new Pen(Color.Black))
{
focusedPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
Rectangle focusedBounds = e.Bounds;
focusedBounds.Size = new Size(e.Bounds.Width - 1, e.Bounds.Height - 1);
e.Graphics.DrawRectangle(focusedPen, focusedBounds);
}
//节点根据isBlink状态绘制显示文本
if (isBlink || !treeView.Focused)
{
TextRenderer.DrawText(e.Graphics, e.Node.Text, e.Node.NodeFont, e.Bounds, Color.White);
}
}
else
{
//绘制未被选择的其余节点
TextRenderer.DrawText(e.Graphics, e.Node.Text, e.Node.NodeFont, e.Bounds, e.Node.ForeColor);
}
}
private void treeView_Disposed(object sender, EventArgs e)
{
th.Abort();
th = null;
}
}
}
例如在你的窗口弄一个Interval等于0.333秒的定时器（Time1），然后如果要改某个特定的Node，可以这样写
--------------------编程问答--------------------
Private nd As TreeNode
Private ct As Integer
Private Sub TestButton1_Click(sender As Object, e As EventArgs) Handles Button1.Click
nd = Me.TreeView1.Nodes(1).Nodes(0).Nodes(0) '选择你要测试的node
ct = 0
Timer1.Start()
End Sub
Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
If (nd.Text = String.Empty) Then
nd.Text = "Asfasfasfad"
nd.ForeColor = Color.Red
Else
nd.Text = String.Empty
End If
If ct > 10 And nd.Text <> String.Empty Then
nd.ForeColor = Color.Black
Timer1.Stop()
Else
ct += 1
End If
End Sub
gif图是怎么截下来的，好清晰 --------------------编程问答-------------------- 在前面加个Gif动态图不是更好 吗，还写这么多的代码 --------------------编程问答-------------------- 非常感谢楼上的各位！！ --------------------编程问答--------------------
因为你的精彩回答，给推荐下 --------------------编程问答--------------------
这样比代码来的效率高 --------------------编程问答--------------------
--------------------编程问答--------------------
使用 GifMaker这个小工具~ --------------------编程问答--------------------
对啊，可以有多个解决方案 --------------------编程问答-------------------- 好啊，长知识了 --------------------编程问答--------------------
--------------------编程问答--------------------
除
--------------------编程问答--------------------
good,錄點子
--------------------编程问答--------------------
winform的么？是的话可以写个例子给你看看
--------------------编程问答--------------------
路过来看看 感觉很不错
--------------------编程问答--------------------
除
--------------------编程问答--------------------
除
--------------------编程问答--------------------
--------------------编程问答--------------------
#4的程序有一个缺点，就是当树控件失去焦点时便不再闪烁节点了，这样的体验很不好，现在修改下程序实现失去焦点时也能正常闪烁，除此之外，还添加了一个属性，即高亮显示与否。新程序效果图：
代码：
--------------------编程问答-------------------- 除 --------------------编程问答-------------------- 来学习了，非常感谢啊 --------------------编程问答-------------------- 这一下子看好了，这一下子流水账 --------------------编程问答-------------------- 结点和列表怎么结合用？ --------------------编程问答-------------------- 楼主，不错哦 --------------------编程问答-------------------- 写的不错！很好！！！ --------------------编程问答--------------------
public class BlinkTreeNodeRenderer
{
private TreeView treeView;
private System.Threading.Thread th;
private int blinkRate;
private bool isBlink = false;
public bool HightLight { get; set; }
public BlinkTreeNodeRenderer(TreeView treeView)
{
Initialize(treeView, 1);
}
public BlinkTreeNodeRenderer(TreeView treeView, int blinkRate, bool hightLight = true)
{
Initialize(treeView, blinkRate, hightLight);
}
private void Initialize(TreeView treeView, int blinkRate, bool hightLight = true)
{
if (blinkRate <= 0 || blinkRate > 1000)
{
throw new ArgumentOutOfRangeException("blinkRate", "blinkRate应大于0且小于1000");
}
//...略
this.HightLight = hightLight;
}
private void Blink()
{
int frameTime = 1000 / blinkRate;
while (true)
{
try
{
System.Threading.Thread.Sleep(frameTime);
isBlink = !isBlink;
treeView.BeginInvoke(new MethodInvoker(delegate()
{
if (treeView.SelectedNode != null)
{
if (treeView.Focused)
treeView.Invalidate(treeView.SelectedNode.Bounds);
else
DrawBlinkNode(treeView.SelectedNode);
}
}));
}
catch { }
}
}
private void DrawBlinkNode(TreeNode node)
{
Graphics g = treeView.CreateGraphics();
Brush brush = null;
Pen focusedPen = focusedPen = new Pen(Color.Black);
Font font = new Font(treeView.Font.FontFamily, treeView.Font.Size);
if (HightLight)
{
brush = new SolidBrush(SystemColors.Highlight);
g.FillRectangle(brush, node.Bounds);
focusedPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
Rectangle focusedBounds = node.Bounds;
focusedBounds.Size = new Size(node.Bounds.Width - 1, node.Bounds.Height - 1);
g.DrawRectangle(focusedPen, focusedBounds);
}
else
{
brush = new SolidBrush(treeView.BackColor);
g.FillRectangle(brush, node.Bounds);
}
if (isBlink)
{
TextRenderer.DrawText(g, node.Text, font, node.Bounds,
HightLight ? Color.White : node.ForeColor);
}
font.Dispose();
focusedPen.Dispose();
brush.Dispose();
}
private void treeView_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
e.DrawDefault = false;
if ((e.State & TreeNodeStates.Selected) != 0 || (e.State & TreeNodeStates.Focused) != 0)
DrawBlinkNode(e.Node);
else
TextRenderer.DrawText(e.Graphics, e.Node.Text, e.Node.NodeFont, e.Bounds, e.Node.ForeColor);
}
//...略
}
一样，我还是比较关心介个
--------------------编程问答--------------------
GIFmaker和代码都值得学习
--------------------编程问答--------------------
收藏一下，用的着
--------------------编程问答--------------------
除
--------------------编程问答--------------------
变个色就挺好了，闪啊闪的头晕。
--------------------编程问答--------------------
--------------------编程问答--------------------
话说你贴出修改后的程序，我帮你patch啊。 --------------------编程问答-------------------- 灰常不错的说：） --------------------编程问答--------------------
using System;--------------------编程问答-------------------- 高手莫非都在用VB.Net？？？ --------------------编程问答-------------------- 二楼的回复是最经典的，还用特殊代码就行了。 --------------------编程问答-------------------- 二楼是夜猫子，但还是要说辛苦了 --------------------编程问答-------------------- 学习了 好像很给力的样子哦 --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 收藏一下.. --------------------编程问答-------------------- 除 --------------------编程问答-------------------- 哈哈 好高级的样子 --------------------编程问答-------------------- Mark
using System.Drawing;
using System.Windows.Forms;
namespace BlinkTreeNodeDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
Load += new EventHandler(Form1_Load);
}
private void Form1_Load(object sender, EventArgs e)
{
SetupBlinkTreeView();
}
private void SetupBlinkTreeView()
{
while (!this.IsHandleCreated) ;
//每秒闪烁一次
BlinkTreeNodeRenderer bt1 = new BlinkTreeNodeRenderer(treeView1, 1);
//每秒闪烁10次
BlinkTreeNodeRenderer bt2 = new BlinkTreeNodeRenderer(treeView2, 10);
//每秒闪烁25次
BlinkTreeNodeRenderer bt3 = new BlinkTreeNodeRenderer(treeView3, 25);
}
}
public class BlinkTreeNodeRenderer
{
private TreeView treeView;
private System.Threading.Thread th;
private int blinkRate;
private bool isBlink = false;
public BlinkTreeNodeRenderer(TreeView treeView)
{
Initialize(treeView, 1);
}
public BlinkTreeNodeRenderer(TreeView treeView, int blinkRate)
{
Initialize(treeView, blinkRate);
}
private void Initialize(TreeView treeView, int blinkRate)
{
if (blinkRate < 0 || blinkRate > 1000)
{
throw new ArgumentOutOfRangeException("blinkRate", "blinkRate应大于0且小于1000");
}
this.treeView = treeView;
this.blinkRate = blinkRate;
this.treeView.HideSelection = false;
this.treeView.DrawMode = TreeViewDrawMode.OwnerDrawText;
this.treeView.DrawNode += new DrawTreeNodeEventHandler(treeView_DrawNode);
this.treeView.Disposed += new EventHandler(treeView_Disposed);
this.th = new System.Threading.Thread(new System.Threading.ThreadStart(Blink));
this.th.IsBackground = true;
this.th.Start();
}
//一定的时间间隔更改isBlink的值，并使当前选择节点区域无效（不用对整个控件无效），发送绘制消息
private void Blink()
{
int sleepTime = 1000 / blinkRate;
while (true)
{
System.Threading.Thread.Sleep(sleepTime);
isBlink = !isBlink;
treeView.BeginInvoke(new MethodInvoker(delegate()
{
if (treeView.SelectedNode != null && treeView.Focused)
{
treeView.Invalidate(treeView.SelectedNode.Bounds);
}
}));
}
}
private void treeView_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
//设置为false由用户绘制而非操作系统绘制
e.DrawDefault = false;
if ((e.State & TreeNodeStates.Selected) != 0 || (e.State & TreeNodeStates.Focused) != 0)
{
//判断节点是否已选择或者已获得焦点，如果是true则绘制高亮显示、焦点框
e.Graphics.FillRectangle(new SolidBrush(SystemColors.Highlight), e.Bounds);
using (Pen focusedPen = new Pen(Color.Black))
{
focusedPen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
Rectangle focusedBounds = e.Bounds;
focusedBounds.Size = new Size(e.Bounds.Width - 1, e.Bounds.Height - 1);
e.Graphics.DrawRectangle(focusedPen, focusedBounds);
}
//节点根据isBlink状态绘制显示文本
if (isBlink || !treeView.Focused)
{
TextRenderer.DrawText(e.Graphics, e.Node.Text, e.Node.NodeFont, e.Bounds, Color.White);
}
}
else
{
//绘制未被选择的其余节点
TextRenderer.DrawText(e.Graphics, e.Node.Text, e.Node.NodeFont, e.Bounds, e.Node.ForeColor);
}
}
private void treeView_Disposed(object sender, EventArgs e)
{
th.Abort();
th = null;
}
}
}
--------------------编程问答--------------------
Mark
--------------------编程问答--------------------
居然是VB? --------------------编程问答-------------------- 你用的什么录屏软件？？？ --------------------编程问答--------------------
使用 GifMaker这个小工具 --------------------编程问答-------------------- 人才济济呀哈哈
补充：.NET技术 , C#
