512 lines
15 KiB
C#
512 lines
15 KiB
C#
/******************************************************************************
|
||
* SunnyUI 开源控件库、工具类库、扩展类库、多页面开发框架。
|
||
* CopyRight (C) 2012-2022 ShenYongHua(沈永华).
|
||
* QQ群：56829229 QQ：17612584 EMail：SunnyUI@QQ.Com
|
||
*
|
||
* Blog: https://www.cnblogs.com/yhuse
|
||
* Gitee: https://gitee.com/yhuse/SunnyUI
|
||
* GitHub: https://github.com/yhuse/SunnyUI
|
||
*
|
||
* SunnyUI.dll can be used for free under the GPL-3.0 license.
|
||
* If you use this code, please keep this note.
|
||
* 如果您使用此代码，请保留此说明。
|
||
******************************************************************************
|
||
* 文件名称: UIScrollBar.cs
|
||
* 文件说明: 滚动条
|
||
* 当前版本: V3.1
|
||
* 创建日期: 2020-01-01
|
||
*
|
||
* 2020-01-01: V2.2.0 增加文件说明
|
||
* 2020-04-25: V2.2.4 更新主题配置类
|
||
* 2022-03-19: V3.1.1 重构主题配色
|
||
******************************************************************************/
|
||
|
||
using System;
|
||
using System.ComponentModel;
|
||
using System.Drawing;
|
||
using System.Windows.Forms;
|
||
|
||
namespace Sunny.UI
|
||
{
|
||
[DefaultEvent("ValueChanged")]
|
||
[DefaultProperty("Value")]
|
||
[ToolboxItem(true)]
|
||
public sealed class UIScrollBar : UIControl
|
||
{
|
||
public UIScrollBar()
|
||
{
|
||
SetStyleFlags(true, false);
|
||
Maximum = 100;
|
||
up_state = value_state = down_state = DrawItemState.None;
|
||
timer = new Timer();
|
||
timer.Interval = 150;
|
||
timer.Tick += TimerTick;
|
||
Width = SystemInformation.VerticalScrollBarWidth + 2;
|
||
Height = 300;
|
||
ShowText = false;
|
||
|
||
fillColor = UIStyles.Blue.ScrollBarFillColor;
|
||
foreColor = UIStyles.Blue.ScrollBarForeColor;
|
||
fillHoverColor = UIStyles.Blue.ScrollBarFillHoverColor;
|
||
fillPressColor = UIStyles.Blue.ScrollBarFillPressColor;
|
||
}
|
||
|
||
private int scrollValue;
|
||
private int SmallChange = 1;
|
||
private int LargeChange = 10;
|
||
private int maximum = 100;
|
||
private DrawItemState up_state, value_state, down_state;
|
||
private DrawItemState up_state1, value_state1, down_state1;
|
||
private bool dragMove;
|
||
private int dragOffset;
|
||
private int barHeight;
|
||
private double percentValue;
|
||
private readonly Timer timer;
|
||
private bool isScrollUp = true;
|
||
private bool largeChange = true;
|
||
|
||
public event EventHandler ValueChanged;
|
||
|
||
protected override void Dispose(bool disposing)
|
||
{
|
||
base.Dispose(disposing);
|
||
timer?.Stop();
|
||
timer?.Dispose();
|
||
}
|
||
|
||
[DefaultValue(0)]
|
||
[Description("当前值"), Category("SunnyUI")]
|
||
public int Value
|
||
{
|
||
get => scrollValue;
|
||
set
|
||
{
|
||
scrollValue = Math.Min(maximum, value);
|
||
scrollValue = Math.Max(scrollValue, 0);
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
[DefaultValue(100)]
|
||
[Description("最大值"), Category("SunnyUI")]
|
||
public int Maximum
|
||
{
|
||
get => maximum;
|
||
set
|
||
{
|
||
maximum = Math.Max(value, 1);
|
||
SmallChange = value / 50;
|
||
SmallChange = Math.Max(1, SmallChange);
|
||
|
||
LargeChange = value / 10;
|
||
LargeChange = Math.Max(1, LargeChange);
|
||
CalcValueArea();
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
protected override void OnSizeChanged(EventArgs e)
|
||
{
|
||
base.OnSizeChanged(e);
|
||
CalcValueArea();
|
||
}
|
||
|
||
private void TimerTick(object sender, EventArgs e)
|
||
{
|
||
if (isScrollUp)
|
||
ScrollUp(largeChange);
|
||
else
|
||
ScrollDown(largeChange);
|
||
}
|
||
|
||
private Rectangle GetUpRect()
|
||
{
|
||
var rect = new Rectangle(1, 1, Width - 2, 16);
|
||
return rect;
|
||
}
|
||
|
||
private void CalcValueArea()
|
||
{
|
||
var centerHeight = GetValueClipRect().Height;
|
||
|
||
barHeight = centerHeight / (maximum + 1);
|
||
barHeight = Math.Max(30, barHeight);
|
||
if (maximum == 0) maximum = 1;
|
||
percentValue = ((double)centerHeight - barHeight) / maximum;
|
||
}
|
||
|
||
private Rectangle GetValueRect()
|
||
{
|
||
return new Rectangle(Width / 2 - 3, ValueToPos(scrollValue), 6, barHeight);
|
||
}
|
||
|
||
private int ValueToPos(int value)
|
||
{
|
||
return (int)(value * percentValue) + 17;
|
||
}
|
||
|
||
private int PosToValue(int pos)
|
||
{
|
||
var value = (int)((pos - 17) / percentValue);
|
||
if (value < 0)
|
||
value = 0;
|
||
if (value > maximum)
|
||
value = maximum;
|
||
return value;
|
||
}
|
||
|
||
private Rectangle GetDownRect()
|
||
{
|
||
var rect = new Rectangle(1, Height - 17, Width - 2, 16);
|
||
return rect;
|
||
}
|
||
|
||
private Rectangle GetValueClipRect()
|
||
{
|
||
var clip = new Rectangle(1, 17, Width - 2, Height - 17 * 2);
|
||
return clip;
|
||
}
|
||
|
||
protected override void OnPaint(PaintEventArgs e)
|
||
{
|
||
e.Graphics.Clear(fillColor);
|
||
DrawUpDownArrow(e.Graphics, up_state, GetUpRect(), true);
|
||
DrawUpDownArrow(e.Graphics, down_state, GetDownRect(), false);
|
||
DrawValueBar(e.Graphics, value_state);
|
||
if (ShowLeftLine)
|
||
{
|
||
e.Graphics.DrawLine(RectColor, 0, 0, 0, Height);
|
||
}
|
||
}
|
||
|
||
private bool showLeftLine;
|
||
[DefaultValue(false)]
|
||
public bool ShowLeftLine
|
||
{
|
||
get => showLeftLine; set
|
||
{
|
||
showLeftLine = value;
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
private void DrawValueBar(Graphics g, DrawItemState state)
|
||
{
|
||
var rect = GetValueRect();
|
||
|
||
Color clr = foreColor;
|
||
if ((state & DrawItemState.HotLight) == DrawItemState.HotLight)
|
||
{
|
||
clr = fillHoverColor;
|
||
}
|
||
|
||
if ((state & DrawItemState.Selected) == DrawItemState.Selected)
|
||
{
|
||
clr = fillPressColor;
|
||
}
|
||
|
||
if (dragMove)
|
||
{
|
||
rect = new Rectangle(rect.Left, MousePos - barHeight / 2, rect.Width, barHeight);
|
||
if (rect.Top < 17)
|
||
{
|
||
rect = new Rectangle(rect.Left, 17, rect.Width, barHeight);
|
||
}
|
||
|
||
if (rect.Bottom > Height - 17)
|
||
{
|
||
rect = new Rectangle(rect.Left, Height - 17 - barHeight, rect.Width, barHeight);
|
||
}
|
||
}
|
||
|
||
g.SetHighQuality();
|
||
g.FillRoundRectangle(clr, rect, 5);
|
||
g.SetDefaultQuality();
|
||
}
|
||
|
||
private void DrawUpDownArrow(Graphics g, DrawItemState state, Rectangle rect, bool isUp)
|
||
{
|
||
Color clr_arrow = foreColor;
|
||
|
||
if ((state & DrawItemState.HotLight) == DrawItemState.HotLight)
|
||
{
|
||
clr_arrow = fillHoverColor;
|
||
}
|
||
|
||
if ((state & DrawItemState.Selected) == DrawItemState.Selected)
|
||
{
|
||
clr_arrow = fillPressColor;
|
||
}
|
||
|
||
g.FillRectangle(fillColor, rect);
|
||
g.SetHighQuality();
|
||
using (var pen = new Pen(clr_arrow, 2))
|
||
{
|
||
Point pt1, pt2, pt3;
|
||
if (!isUp)
|
||
{
|
||
pt1 = new Point(Width / 2 - 4, Height - 16 / 2 - 4);
|
||
pt2 = new Point(Width / 2, Height - 16 / 2);
|
||
pt3 = new Point(Width / 2 + 4, Height - 16 / 2 - 4);
|
||
}
|
||
else
|
||
{
|
||
pt1 = new Point(Width / 2 - 4, 16 / 2 + 4 - 1);
|
||
pt2 = new Point(Width / 2, 16 / 2 - 1);
|
||
pt3 = new Point(Width / 2 + 4, 16 / 2 + 4 - 1);
|
||
}
|
||
|
||
g.DrawLines(pen, new[] { pt1, pt2, pt3 });
|
||
}
|
||
|
||
g.SetDefaultQuality();
|
||
}
|
||
|
||
public void SetValue(int value)
|
||
{
|
||
if (value < 0)
|
||
{
|
||
value = 0;
|
||
}
|
||
|
||
if (value > maximum)
|
||
{
|
||
value = maximum;
|
||
}
|
||
|
||
scrollValue = value;
|
||
ValueChanged?.Invoke(this, EventArgs.Empty);
|
||
Invalidate();
|
||
}
|
||
|
||
public void ScrollUp(bool large)
|
||
{
|
||
SetValue(scrollValue - (large ? LargeChange : SmallChange));
|
||
}
|
||
|
||
public void ScrollDown(bool large)
|
||
{
|
||
SetValue(scrollValue + (large ? LargeChange : SmallChange));
|
||
}
|
||
|
||
private void StartScroll(bool up, bool large)
|
||
{
|
||
isScrollUp = up;
|
||
largeChange = large;
|
||
timer.Start();
|
||
}
|
||
|
||
private void StopScroll()
|
||
{
|
||
timer.Stop();
|
||
}
|
||
|
||
protected override void OnMouseDown(MouseEventArgs e)
|
||
{
|
||
if (e.Button != MouseButtons.Left)
|
||
{
|
||
return;
|
||
}
|
||
|
||
up_state = value_state = down_state = DrawItemState.None;
|
||
IsPress = true;
|
||
var hit = HitState(e.X, e.Y);
|
||
switch (hit)
|
||
{
|
||
case 1:
|
||
if (Value > 0)
|
||
{
|
||
up_state = DrawItemState.Selected;
|
||
ScrollUp(false);
|
||
StartScroll(true, false);
|
||
}
|
||
break;
|
||
|
||
case 2:
|
||
value_state = DrawItemState.Selected;
|
||
dragMove = true;
|
||
dragOffset = GetValueRect().Y - e.Y;
|
||
break;
|
||
|
||
case 3:
|
||
if (Value < Maximum)
|
||
{
|
||
down_state = DrawItemState.Selected;
|
||
ScrollDown(false);
|
||
StartScroll(false, false);
|
||
}
|
||
break;
|
||
|
||
case 4:
|
||
if (Value > 0)
|
||
{
|
||
ScrollUp(true);
|
||
if (IsPress)
|
||
{
|
||
StartScroll(true, true);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case 5:
|
||
if (Value < Maximum)
|
||
{
|
||
ScrollDown(false);
|
||
if (IsPress)
|
||
{
|
||
StartScroll(false, true);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (StateChange())
|
||
{
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
protected override void OnMouseUp(MouseEventArgs e)
|
||
{
|
||
IsPress = false;
|
||
dragMove = false;
|
||
StopScroll();
|
||
Invalidate();
|
||
}
|
||
|
||
private int MousePos;
|
||
|
||
protected override void OnMouseMove(MouseEventArgs e)
|
||
{
|
||
MousePos = e.Y;
|
||
var hit = HitState(e.X, e.Y);
|
||
up_state = value_state = down_state = DrawItemState.None;
|
||
switch (hit)
|
||
{
|
||
case 1:
|
||
up_state = IsPress ? DrawItemState.Selected : DrawItemState.HotLight;
|
||
break;
|
||
|
||
case 2:
|
||
value_state = IsPress ? DrawItemState.Selected : DrawItemState.HotLight;
|
||
break;
|
||
|
||
case 3:
|
||
down_state = IsPress ? DrawItemState.Selected : DrawItemState.HotLight;
|
||
break;
|
||
}
|
||
|
||
if (dragMove)
|
||
{
|
||
var value = PosToValue(e.Y + dragOffset);
|
||
SetValue(value);
|
||
return;
|
||
}
|
||
|
||
if (StateChange())
|
||
{
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
protected override void OnMouseLeave(EventArgs e)
|
||
{
|
||
base.OnMouseLeave(e);
|
||
up_state = down_state = value_state = DrawItemState.None;
|
||
Invalidate();
|
||
}
|
||
|
||
private bool StateChange()
|
||
{
|
||
var change = up_state != up_state1 || down_state != down_state1 || value_state != value_state1;
|
||
up_state1 = up_state;
|
||
value_state1 = value_state;
|
||
down_state1 = down_state;
|
||
return change;
|
||
}
|
||
|
||
private int HitState(int x, int y)
|
||
{
|
||
var rect_up = GetUpRect();
|
||
var rect_down = GetDownRect();
|
||
var rect_value = GetValueRect();
|
||
var rect_value_up = new Rectangle(0, rect_up.Bottom, Width, rect_value.Top - rect_up.Bottom);
|
||
var rect_value_down = new Rectangle(0, rect_value.Bottom, Width, rect_down.Top - rect_value.Bottom);
|
||
if (rect_up.Contains(x, y))
|
||
return 1;
|
||
else if (rect_down.Contains(x, y))
|
||
return 3;
|
||
else if (rect_value.Contains(x, y) || value_state == DrawItemState.Selected)
|
||
return 2;
|
||
else if (rect_value_up.Contains(x, y))
|
||
return 4;
|
||
else if (rect_value_down.Contains(x, y))
|
||
return 5;
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 设置主题样式
|
||
/// </summary>
|
||
/// <param name="uiColor">主题样式</param>
|
||
public override void SetStyleColor(UIBaseStyle uiColor)
|
||
{
|
||
base.SetStyleColor(uiColor);
|
||
|
||
fillColor = uiColor.ScrollBarFillColor;
|
||
foreColor = uiColor.ScrollBarForeColor;
|
||
fillHoverColor = uiColor.ScrollBarFillHoverColor;
|
||
fillPressColor = uiColor.ScrollBarFillPressColor;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 字体颜色
|
||
/// </summary>
|
||
[Description("字体颜色"), Category("SunnyUI")]
|
||
[DefaultValue(typeof(Color), "80, 160, 255")]
|
||
public override Color ForeColor
|
||
{
|
||
get => foreColor;
|
||
set => SetForeColor(value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 字体颜色
|
||
/// </summary>
|
||
[Description("字体颜色"), Category("SunnyUI")]
|
||
[DefaultValue(typeof(Color), "80, 160, 255")]
|
||
public Color RectColor
|
||
{
|
||
get => rectColor;
|
||
set => SetRectColor(value);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 填充颜色，当值为背景色或透明色或空值则不填充
|
||
/// </summary>
|
||
[Description("填充颜色"), Category("SunnyUI")]
|
||
[DefaultValue(typeof(Color), "243, 249, 255")]
|
||
public Color FillColor
|
||
{
|
||
get => fillColor;
|
||
set => SetFillColor(value);
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "115, 179, 255")]
|
||
[Description("鼠标移上颜色"), Category("SunnyUI")]
|
||
public Color HoverColor
|
||
{
|
||
get => fillHoverColor;
|
||
set => SetFillHoverColor(value);
|
||
}
|
||
|
||
[DefaultValue(typeof(Color), "64, 128, 204")]
|
||
[Description("鼠标按下颜色"), Category("SunnyUI")]
|
||
public Color PressColor
|
||
{
|
||
get => fillPressColor;
|
||
set => SetFillPressColor(value);
|
||
}
|
||
}
|
||
} |