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* UITreeView： CheckBoxes增加三态，感谢群友：笑口常开

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Sunny 2021-08-26 10:27:53 +08:00
parent 37aacb0c13
commit 013b5084e1
7 changed files with 233 additions and 129 deletions
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Bin/net40/SunnyUI.dll
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Bin/net5.0-windows/SunnyUI.dll
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SunnyUI/Controls/UITreeView.cs
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@ -20,14 +20,18 @@
* 2020-07-07: V2.2.6 全部重写，增加圆角，CheckBoxes等 * 2020-07-07: V2.2.6 全部重写，增加圆角，CheckBoxes等
* 2020-08-12: V2.2.7 更新可设置背景色 * 2020-08-12: V2.2.7 更新可设置背景色
* 2021-07-19: V3.0.5 调整了显示CheckBoxes时图片位置 * 2021-07-19: V3.0.5 调整了显示CheckBoxes时图片位置
* 2021-08-26: V3.0.6 CheckBoxes增加三态，感谢群友：笑口常开
******************************************************************************/ ******************************************************************************/
using System; using System;
using System.Collections; using System.Collections;
using System.Collections.Generic;
using System.ComponentModel; using System.ComponentModel;
using System.Data;
using System.Drawing; using System.Drawing;
using System.Drawing.Design; using System.Drawing.Design;
using System.Drawing.Drawing2D; using System.Drawing.Drawing2D;
using System.Linq;
using System.Windows.Forms; using System.Windows.Forms;
namespace Sunny.UI namespace Sunny.UI
@ -698,156 +702,188 @@ namespace Sunny.UI
{ {
base.OnDrawNode(e); base.OnDrawNode(e);
if (e.Node == null) return; if (e.Node == null || Nodes.Count == 0) return;
if (BorderStyle == BorderStyle.Fixed3D) BorderStyle = BorderStyle.FixedSingle; try
if (e.Node == null || e.Node.Bounds.Width <= 0 && e.Node.Bounds.Height <= 0 && e.Node.Bounds.X <= 0 &&
e.Node.Bounds.Y <= 0)
{ {
e.DrawDefault = true; if (BorderStyle == BorderStyle.Fixed3D) BorderStyle = BorderStyle.FixedSingle;
}
else
{
var drawLeft = (e.Node.Level + 1) * Indent + 3;
var checkBoxLeft = (e.Node.Level + 1) * Indent + 1;
var imageLeft = drawLeft;
var haveImage = false;
var sf = e.Graphics.MeasureString(e.Node.Text, Font);
if (CheckBoxes) if (e.Node == null || e.Node.Bounds.Width <= 0 && e.Node.Bounds.Height <= 0 && e.Node.Bounds.X <= 0 && e.Node.Bounds.Y <= 0)
{ {
drawLeft += 16; e.DrawDefault = true;
imageLeft += 16;
}
if (ImageList != null && ImageList.Images.Count > 0 && e.Node.ImageIndex >= 0 &&
e.Node.ImageIndex < ImageList.Images.Count)
{
haveImage = true;
drawLeft += ImageList.ImageSize.Width + 6;
}
var checkboxColor = ForeColor;
if (e.Node == SelectedNode)
{
e.Graphics.FillRectangle((e.State & TreeNodeStates.Hot) != 0 ? HoverColor : SelectedColor,
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
e.Graphics.DrawString(e.Node.Text, Font, SelectedForeColor, drawLeft,
e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
checkboxColor = SelectedForeColor;
}
else if (e.Node == CurrentNode && (e.State & TreeNodeStates.Hot) != 0)
{
e.Graphics.FillRectangle(HoverColor,
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
e.Graphics.DrawString(e.Node.Text, Font, ForeColor, drawLeft,
e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
} }
else else
{ {
e.Graphics.FillRectangle(FillColor, var drawLeft = (e.Node.Level + 1) * Indent + 3;
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height))); var checkBoxLeft = (e.Node.Level + 1) * Indent + 1;
e.Graphics.DrawString(e.Node.Text, Font, ForeColor, drawLeft, var imageLeft = drawLeft;
e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f); var haveImage = false;
} var sf = e.Graphics.MeasureString(e.Node.Text, Font);
if (haveImage) if (CheckBoxes)
{
if (e.Node == SelectedNode && e.Node.SelectedImageIndex >= 0 &&
e.Node.SelectedImageIndex < ImageList.Images.Count)
e.Graphics.DrawImage(ImageList.Images[e.Node.SelectedImageIndex], imageLeft,
e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);
else
e.Graphics.DrawImage(ImageList.Images[e.Node.ImageIndex], imageLeft,
e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);
}
if (CheckBoxes)
{
if (!e.Node.Checked)
using (var pn = new Pen(checkboxColor, 1))
{
e.Graphics.DrawRectangle(pn,
new Rectangle(checkBoxLeft + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1, 12, 12));
}
else
using (var pn = new Pen(checkboxColor, 2))
{
var pt1 = new Point(checkBoxLeft + 2 + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1 + 5);
var pt2 = new Point(pt1.X + 3, pt1.Y + 3);
var pt3 = new Point(pt2.X + 5, pt2.Y - 5);
PointF[] CheckMarkLine = { pt1, pt2, pt3 };
e.Graphics.SetHighQuality();
e.Graphics.DrawLines(pn, CheckMarkLine);
e.Graphics.SetDefaultQuality();
e.Graphics.DrawRectangle(checkboxColor,
new Rectangle(checkBoxLeft + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1, 12, 12));
}
}
var lineY = e.Bounds.Y + e.Node.Bounds.Height / 2 - 1;
var lineX = 3 + e.Node.Level * Indent + 9;
if (ShowLinesEx)
try
{ {
//绘制虚线 drawLeft += 16;
var pn = new Pen(LineColor); imageLeft += 16;
pn.DashStyle = DashStyle.Dot; }
e.Graphics.DrawLine(pn, lineX, lineY, lineX + 10, lineY);
if (e.Node.Level >= 1) if (ImageList != null && ImageList.Images.Count > 0 && e.Node.ImageIndex >= 0 &&
e.Node.ImageIndex < ImageList.Images.Count)
{
haveImage = true;
drawLeft += ImageList.ImageSize.Width + 6;
}
var checkboxColor = ForeColor;
if (e.Node != null)
{
if (e.Node == SelectedNode)
{ {
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Bounds.Top); e.Graphics.FillRectangle((e.State & TreeNodeStates.Hot) != 0 ? HoverColor : SelectedColor,
if (e.Node.NextNode != null) new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
var pNode = e.Node.Parent; e.Graphics.DrawString(e.Node.Text, Font, SelectedForeColor, drawLeft,
while (pNode != null) e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
{
lineX -= Indent;
if (pNode.NextNode != null) checkboxColor = SelectedForeColor;
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Top); }
else if (e.Node == CurrentNode && (e.State & TreeNodeStates.Hot) != 0)
if (pNode.NextNode != null) {
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom); e.Graphics.FillRectangle(HoverColor,
new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
pNode = pNode.Parent; e.Graphics.DrawString(e.Node.Text, Font, ForeColor, drawLeft,
} e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
} }
else else
{ {
if (e.Node.PrevNode != null) e.Graphics.FillRectangle(FillColor,
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Top); new Rectangle(new Point(0, e.Node.Bounds.Y), new Size(Width, e.Node.Bounds.Height)));
e.Graphics.DrawString(e.Node.Text, Font, ForeColor, drawLeft,
if (e.Node.NextNode != null) e.Bounds.Y + (ItemHeight - sf.Height) / 2.0f);
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
} }
pn.Dispose(); if (haveImage)
} {
catch (Exception exception) if (e.Node == SelectedNode && e.Node.SelectedImageIndex >= 0 &&
{ e.Node.SelectedImageIndex < ImageList.Images.Count)
Console.WriteLine(exception); e.Graphics.DrawImage(ImageList.Images[e.Node.SelectedImageIndex], imageLeft,
e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);
else
e.Graphics.DrawImage(ImageList.Images[e.Node.ImageIndex], imageLeft,
e.Bounds.Y + (e.Bounds.Height - ImageList.ImageSize.Height) / 2);
}
if (CheckBoxes)
{
if (!e.Node.Checked)
{
e.Graphics.DrawRectangle(checkboxColor,
new Rectangle(checkBoxLeft + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1, 12, 12));
}
else
{
using (var pn = new Pen(checkboxColor, 2))
{
var pt1 = new Point(checkBoxLeft + 2 + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1 + 5);
var pt2 = new Point(pt1.X + 3, pt1.Y + 3);
var pt3 = new Point(pt2.X + 5, pt2.Y - 5);
PointF[] CheckMarkLine = { pt1, pt2, pt3 };
e.Graphics.SetHighQuality();
e.Graphics.DrawLines(pn, CheckMarkLine);
e.Graphics.SetDefaultQuality();
e.Graphics.DrawRectangle(checkboxColor,
new Rectangle(checkBoxLeft + 2, e.Bounds.Y + (ItemHeight - 12) / 2 - 1, 12, 12));
}
}
if (!DicNodeStatus.Keys.Contains(e.Node.GetHashCode()))
{
DicNodeStatus.Add(e.Node.GetHashCode(), false);
}
if (DicNodeStatus[e.Node.GetHashCode()])
{
var location = e.Node.Bounds.Location;
location.Offset(-29, 10);
var size = new Size(7, 7);
e.Graphics.FillRectangle(checkboxColor, new Rectangle(location, size)); //这里绘制的是正方形
}
}
} }
lineX = 3 + e.Node.Level * Indent + 9; var lineY = e.Bounds.Y + e.Node.Bounds.Height / 2 - 1;
//绘制左侧+号 var lineX = 3 + e.Node.Level * Indent + 9;
if (ShowPlusMinus && e.Node.Nodes.Count > 0)
{ if (ShowLinesEx)
e.Graphics.FillRectangle(Color.White, new Rectangle(lineX - 4, lineY - 4, 8, 8)); {
e.Graphics.DrawRectangle(UIFontColor.Primary, new Rectangle(lineX - 4, lineY - 4, 8, 8)); try
e.Graphics.DrawLine(UIFontColor.Primary, lineX - 2, lineY, lineX + 2, lineY); {
if (!e.Node.IsExpanded) //绘制虚线
e.Graphics.DrawLine(UIFontColor.Primary, lineX, lineY - 2, lineX, lineY + 2); var pn = new Pen(LineColor);
pn.DashStyle = DashStyle.Dot;
e.Graphics.DrawLine(pn, lineX, lineY, lineX + 10, lineY);
if (e.Node.Level >= 1)
{
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Bounds.Top);
if (e.Node.NextNode != null)
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
var pNode = e.Node.Parent;
while (pNode != null)
{
lineX -= Indent;
if (pNode != null && Nodes.Count > 0)
{
if (pNode.NextNode != null)
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Top);
if (pNode.NextNode != null)
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
}
pNode = pNode.Parent;
}
}
else
{
if (e.Node != null && Nodes.Count > 0)
{
if (e.Node.PrevNode != null)
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Top);
if (e.Node.NextNode != null)
e.Graphics.DrawLine(pn, lineX, lineY, lineX, e.Node.Bounds.Bottom);
}
}
pn.Dispose();
}
catch (Exception exception)
{
Console.WriteLine(exception);
}
}
lineX = 3 + e.Node.Level * Indent + 9;
//绘制左侧+号
if (ShowPlusMinus && e.Node.Nodes.Count > 0)
{
e.Graphics.FillRectangle(Color.White, new Rectangle(lineX - 4, lineY - 4, 8, 8));
e.Graphics.DrawRectangle(UIFontColor.Primary, new Rectangle(lineX - 4, lineY - 4, 8, 8));
e.Graphics.DrawLine(UIFontColor.Primary, lineX - 2, lineY, lineX + 2, lineY);
if (!e.Node.IsExpanded)
e.Graphics.DrawLine(UIFontColor.Primary, lineX, lineY - 2, lineX, lineY + 2);
}
} }
} }
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
} }
private bool TreeNodeSelected(DrawTreeNodeEventArgs e) private bool TreeNodeSelected(DrawTreeNodeEventArgs e)
@ -867,6 +903,74 @@ namespace Sunny.UI
base.WndProc(ref m); base.WndProc(ref m);
} }
private Dictionary<int, bool> DicNodeStatus = new Dictionary<int, bool>();
protected override void OnAfterCheck(TreeViewEventArgs e)
{
base.OnAfterCheck(e);
if (e.Action == TreeViewAction.ByMouse) //鼠标点击
{
DicNodeStatus[e.Node.GetHashCode()] = false;
SetChildNodeCheckedState(e.Node, e.Node.Checked);
if (e.Node.Parent != null)
{
SetParentNodeCheckedState(e.Node);
}
}
}
private void SetParentNodeCheckedState(TreeNode currNode)
{
TreeNode parentNode = currNode.Parent; //获得当前节点的父节点
var count = parentNode.Nodes.Cast<TreeNode>().Where(n => n.Checked).ToList().Count;
parentNode.Checked = count == parentNode.Nodes.Count;
var half = parentNode.Nodes.Cast<TreeNode>().Where(n => DicNodeStatus[n.GetHashCode()]).ToList().Count;
if ((count > 0 && count < parentNode.Nodes.Count) || half > 0)
{
DicNodeStatus[parentNode.GetHashCode()] = true;
}
else
{
DicNodeStatus[parentNode.GetHashCode()] = false;
}
var g = CreateGraphics();
OnDrawNode(new DrawTreeNodeEventArgs(g, parentNode,
new Rectangle(0, parentNode.Bounds.Y, Width, parentNode.Bounds.Height), TreeNodeStates.Hot));
g.Dispose();
if (parentNode.Parent != null) //如果父节点之上还有父节点
{
SetParentNodeCheckedState(parentNode); //递归调用
}
}
//选中节点之后，选中节点的所有子节点
private void SetChildNodeCheckedState(TreeNode currNode, bool state)
{
TreeNodeCollection nodes = currNode.Nodes; //获取所有子节点
if (nodes.Count > 0) //存在子节点
{
foreach (TreeNode tn in nodes)
{
DicNodeStatus[tn.GetHashCode()] = false;
tn.Checked = state;
SetChildNodeCheckedState(tn, state);//递归调用子节点的子节点
}
}
}
} }
} }
} }

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SunnyUI/Pages/UIPage.cs
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@ -21,7 +21,7 @@
* 2021-06-20: V3.0.4 增加标题行，替代UITitlePage * 2021-06-20: V3.0.4 增加标题行，替代UITitlePage
* 2021-07-18: V3.0.5 修复OnLoad在加载时重复加载两次的问题，增加Final函数，每次页面切换，退出页面都会执行 * 2021-07-18: V3.0.5 修复OnLoad在加载时重复加载两次的问题，增加Final函数，每次页面切换，退出页面都会执行
* 2021-08-17: V3.0.6 增加TitleFont属性 * 2021-08-17: V3.0.6 增加TitleFont属性
* 2021-08-24: V3.0.3 修复OnLoad在加载时重复加载两次的问题 * 2021-08-24: V3.0.6 修复OnLoad在加载时重复加载两次的问题
******************************************************************************/ ******************************************************************************/
using System; using System;