mirror of
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520 lines
18 KiB
C#
520 lines
18 KiB
C#
// ***********************************************************************
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// Assembly : HZH_Controls
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// Created : 2019-09-19
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//
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// ***********************************************************************
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// <copyright file="UCVScrollbar.cs">
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// Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
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// </copyright>
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//
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// Blog: https://www.cnblogs.com/bfyx
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// GitHub：https://github.com/kwwwvagaa/NetWinformControl
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// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
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//
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// If you use this code, please keep this note.
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// ***********************************************************************
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Text;
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using System.Windows.Forms;
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using System.Windows.Forms.Design;
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using System.Diagnostics;
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namespace HZH_Controls.Controls
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{
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/// <summary>
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/// Class UCVScrollbar.
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/// Implements the <see cref="HZH_Controls.Controls.UCControlBase" />
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/// </summary>
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/// <seealso cref="HZH_Controls.Controls.UCControlBase" />
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[Designer(typeof(ScrollbarControlDesigner))]
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[DefaultEvent("Scroll")]
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public class UCVScrollbar : UCControlBase
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{
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/// <summary>
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/// The mo large change
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/// </summary>
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protected int moLargeChange = 10;
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/// <summary>
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/// The mo small change
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/// </summary>
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protected int moSmallChange = 1;
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/// <summary>
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/// The mo minimum
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/// </summary>
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protected int moMinimum = 0;
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/// <summary>
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/// The mo maximum
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/// </summary>
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protected int moMaximum = 100;
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/// <summary>
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/// The mo value
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/// </summary>
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protected int moValue = 0;
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/// <summary>
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/// The n click point
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/// </summary>
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private int nClickPoint;
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/// <summary>
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/// The mo thumb top
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/// </summary>
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protected int moThumbTop = 0;
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/// <summary>
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/// The mo automatic size
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/// </summary>
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protected bool moAutoSize = false;
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/// <summary>
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/// The mo thumb down
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/// </summary>
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private bool moThumbMouseDown = false;
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/// <summary>
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/// The mo thumb dragging
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/// </summary>
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private bool moThumbMouseDragging = false;
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/// <summary>
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/// Occurs when [scroll].
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/// </summary>
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public new event EventHandler Scroll = null;
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/// <summary>
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/// Occurs when [value changed].
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/// </summary>
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public event EventHandler ValueChanged = null;
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/// <summary>
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/// The BTN height
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/// </summary>
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private int btnHeight = 18;
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/// <summary>
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/// The m int thumb minimum height
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/// </summary>
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private int m_intThumbMinHeight = 15;
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/// <summary>
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/// Gets or sets the height of the BTN.
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/// </summary>
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/// <value>The height of the BTN.</value>
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public int BtnHeight
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{
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get { return btnHeight; }
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set { btnHeight = value; }
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}
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/// <summary>
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/// Gets or sets the large change.
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/// </summary>
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/// <value>The large change.</value>
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[EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("自定义"), Description("LargeChange")]
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public int LargeChange
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{
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get { return moLargeChange; }
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set
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{
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moLargeChange = value;
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Invalidate();
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}
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}
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/// <summary>
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/// Gets or sets the small change.
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/// </summary>
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/// <value>The small change.</value>
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[EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("自定义"), Description("SmallChange")]
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public int SmallChange
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{
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get { return moSmallChange; }
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set
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{
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moSmallChange = value;
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Invalidate();
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}
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}
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/// <summary>
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/// Gets or sets the minimum.
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/// </summary>
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/// <value>The minimum.</value>
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[EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("自定义"), Description("Minimum")]
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public int Minimum
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{
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get { return moMinimum; }
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set
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{
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moMinimum = value;
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Invalidate();
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}
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}
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/// <summary>
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/// Gets or sets the maximum.
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/// </summary>
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/// <value>The maximum.</value>
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[EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("自定义"), Description("Maximum")]
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public int Maximum
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{
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get { return moMaximum; }
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set
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{
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moMaximum = value;
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Invalidate();
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}
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}
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/// <summary>
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/// Gets or sets the value.
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/// </summary>
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/// <value>The value.</value>
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[EditorBrowsable(EditorBrowsableState.Always), Browsable(true), DefaultValue(false), Category("自定义"), Description("Value")]
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public int Value
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{
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get { return moValue; }
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set
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{
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moValue = value;
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int nTrackHeight = (this.Height - btnHeight * 2);
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float fThumbHeight = ((float)LargeChange / (float)Maximum) * nTrackHeight;
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int nThumbHeight = (int)fThumbHeight;
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if (nThumbHeight > nTrackHeight)
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{
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nThumbHeight = nTrackHeight;
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fThumbHeight = nTrackHeight;
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}
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if (nThumbHeight < m_intThumbMinHeight)
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{
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nThumbHeight = m_intThumbMinHeight;
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fThumbHeight = m_intThumbMinHeight;
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}
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//figure out value
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int nPixelRange = nTrackHeight - nThumbHeight;
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int nRealRange = (Maximum - Minimum) - LargeChange;
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float fPerc = 0.0f;
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if (nRealRange != 0)
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{
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fPerc = (float)moValue / (float)nRealRange;
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}
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float fTop = fPerc * nPixelRange;
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moThumbTop = (int)fTop;
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Invalidate();
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether [automatic size].
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/// </summary>
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/// <value><c>true</c> if [automatic size]; otherwise, <c>false</c>.</value>
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public override bool AutoSize
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{
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get
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{
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return base.AutoSize;
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}
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set
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{
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base.AutoSize = value;
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if (base.AutoSize)
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{
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this.Width = 15;
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}
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}
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}
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/// <summary>
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/// The thumb color
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/// </summary>
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private Color thumbColor = Color.FromArgb(255, 77, 58);
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/// <summary>
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/// Gets or sets the color of the thumb.
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/// </summary>
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/// <value>The color of the thumb.</value>
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public Color ThumbColor
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{
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get { return thumbColor; }
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set { thumbColor = value; }
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="UCVScrollbar"/> class.
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/// </summary>
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public UCVScrollbar()
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{
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InitializeComponent();
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ConerRadius = 2;
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FillColor = Color.FromArgb(239, 239, 239);
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IsShowRect = false;
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IsRadius = true;
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this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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this.SetStyle(ControlStyles.DoubleBuffer, true);
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this.SetStyle(ControlStyles.ResizeRedraw, true);
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this.SetStyle(ControlStyles.Selectable, true);
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this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
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this.SetStyle(ControlStyles.UserPaint, true);
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}
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/// <summary>
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/// Initializes the component.
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/// </summary>
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private void InitializeComponent()
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{
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this.SuspendLayout();
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//
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// UCVScrollbar
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//
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this.MinimumSize = new System.Drawing.Size(10, 0);
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this.Name = "UCVScrollbar";
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this.Size = new System.Drawing.Size(18, 150);
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this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseDown);
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this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseMove);
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this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.CustomScrollbar_MouseUp);
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this.ResumeLayout(false);
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}
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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e.Graphics.SetGDIHigh();
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//draw thumb
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int nTrackHeight = (this.Height - btnHeight * 2);
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float fThumbHeight = ((float)LargeChange / (float)Maximum) * nTrackHeight;
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int nThumbHeight = (int)fThumbHeight;
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if (nThumbHeight > nTrackHeight)
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{
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nThumbHeight = nTrackHeight;
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fThumbHeight = nTrackHeight;
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}
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if (nThumbHeight < m_intThumbMinHeight)
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{
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nThumbHeight = m_intThumbMinHeight;
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fThumbHeight = m_intThumbMinHeight;
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}
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int nTop = moThumbTop;
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nTop += btnHeight;
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e.Graphics.FillPath(new SolidBrush(thumbColor), new Rectangle(1, nTop, this.Width - 3, nThumbHeight).CreateRoundedRectanglePath(this.ConerRadius));
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ControlHelper.PaintTriangle(e.Graphics, new SolidBrush(thumbColor), new Point(this.Width / 2, btnHeight - Math.Min(5, this.Width / 2)), Math.Min(5, this.Width / 2), GraphDirection.Upward);
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ControlHelper.PaintTriangle(e.Graphics, new SolidBrush(thumbColor), new Point(this.Width / 2, this.Height - (btnHeight - Math.Min(5, this.Width / 2))), Math.Min(5, this.Width / 2), GraphDirection.Downward);
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}
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/// <summary>
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/// Handles the MouseDown event of the CustomScrollbar control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="MouseEventArgs"/> instance containing the event data.</param>
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private void CustomScrollbar_MouseDown(object sender, MouseEventArgs e)
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{
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Point ptPoint = this.PointToClient(Cursor.Position);
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int nTrackHeight = (this.Height - btnHeight * 2);
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float fThumbHeight = ((float)LargeChange / (float)Maximum) * nTrackHeight;
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int nThumbHeight = (int)fThumbHeight;
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if (nThumbHeight > nTrackHeight)
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{
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nThumbHeight = nTrackHeight;
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fThumbHeight = nTrackHeight;
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}
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if (nThumbHeight < m_intThumbMinHeight)
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{
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nThumbHeight = m_intThumbMinHeight;
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fThumbHeight = m_intThumbMinHeight;
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}
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int nTop = moThumbTop;
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nTop += btnHeight;
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Rectangle thumbrect = new Rectangle(new Point(1, nTop), new Size(this.Width - 2, nThumbHeight));
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if (thumbrect.Contains(ptPoint))
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{
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//hit the thumb
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nClickPoint = (ptPoint.Y - nTop);
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//MessageBox.Show(Convert.ToString((ptPoint.Y - nTop)));
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this.moThumbMouseDown = true;
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}
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else
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{
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Rectangle uparrowrect = new Rectangle(new Point(1, 0), new Size(this.Width, btnHeight));
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if (uparrowrect.Contains(ptPoint))
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{
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int nRealRange = (Maximum - Minimum) - LargeChange;
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int nPixelRange = (nTrackHeight - nThumbHeight);
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if (nRealRange > 0)
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{
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if (nPixelRange > 0)
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{
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if ((moThumbTop - SmallChange) < 0)
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moThumbTop = 0;
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else
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moThumbTop -= SmallChange;
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//figure out value
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float fPerc = (float)moThumbTop / (float)nPixelRange;
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float fValue = fPerc * (Maximum - LargeChange);
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moValue = (int)fValue;
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if (ValueChanged != null)
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ValueChanged(this, new EventArgs());
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if (Scroll != null)
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Scroll(this, new EventArgs());
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Invalidate();
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}
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}
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}
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else
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{
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Rectangle downarrowrect = new Rectangle(new Point(1, btnHeight + nTrackHeight), new Size(this.Width, btnHeight));
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if (downarrowrect.Contains(ptPoint))
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{
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int nRealRange = (Maximum - Minimum) - LargeChange;
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int nPixelRange = (nTrackHeight - nThumbHeight);
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if (nRealRange > 0)
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{
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if (nPixelRange > 0)
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{
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if ((moThumbTop + SmallChange) > nPixelRange)
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moThumbTop = nPixelRange;
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else
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moThumbTop += SmallChange;
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//figure out value
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float fPerc = (float)moThumbTop / (float)nPixelRange;
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float fValue = fPerc * (Maximum - LargeChange);
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moValue = (int)fValue;
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if (ValueChanged != null)
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ValueChanged(this, new EventArgs());
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if (Scroll != null)
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Scroll(this, new EventArgs());
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Invalidate();
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}
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}
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}
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}
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}
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}
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/// <summary>
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/// Handles the MouseUp event of the CustomScrollbar control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="MouseEventArgs"/> instance containing the event data.</param>
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private void CustomScrollbar_MouseUp(object sender, MouseEventArgs e)
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{
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this.moThumbMouseDown = false;
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this.moThumbMouseDragging = false;
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}
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/// <summary>
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/// Moves the thumb.
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/// </summary>
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/// <param name="y">The y.</param>
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private void MoveThumb(int y)
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{
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int nRealRange = Maximum - Minimum;
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int nTrackHeight = (this.Height - btnHeight * 2);
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float fThumbHeight = ((float)LargeChange / (float)Maximum) * nTrackHeight;
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int nThumbHeight = (int)fThumbHeight;
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if (nThumbHeight > nTrackHeight)
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{
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nThumbHeight = nTrackHeight;
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fThumbHeight = nTrackHeight;
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}
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if (nThumbHeight < m_intThumbMinHeight)
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{
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nThumbHeight = m_intThumbMinHeight;
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fThumbHeight = m_intThumbMinHeight;
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}
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int nSpot = nClickPoint;
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int nPixelRange = (nTrackHeight - nThumbHeight);
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if (moThumbMouseDown && nRealRange > 0)
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{
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if (nPixelRange > 0)
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{
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int nNewThumbTop = y - (btnHeight + nSpot);
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if (nNewThumbTop < 0)
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{
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moThumbTop = nNewThumbTop = 0;
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}
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else if (nNewThumbTop > nPixelRange)
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{
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moThumbTop = nNewThumbTop = nPixelRange;
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}
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else
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{
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moThumbTop = y - (btnHeight + nSpot);
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}
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float fPerc = (float)moThumbTop / (float)nPixelRange;
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float fValue = fPerc * (Maximum - LargeChange);
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moValue = (int)fValue;
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Application.DoEvents();
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Invalidate();
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}
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}
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}
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/// <summary>
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/// Handles the MouseMove event of the CustomScrollbar control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="MouseEventArgs"/> instance containing the event data.</param>
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private void CustomScrollbar_MouseMove(object sender, MouseEventArgs e)
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{
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if (!moThumbMouseDown)
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return;
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if (moThumbMouseDown == true)
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{
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this.moThumbMouseDragging = true;
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}
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if (this.moThumbMouseDragging)
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{
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MoveThumb(e.Y);
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}
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if (ValueChanged != null)
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ValueChanged(this, new EventArgs());
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if (Scroll != null)
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Scroll(this, new EventArgs());
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}
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}
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} |
