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* UIListBox: 增加滚动条颜色设置

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Sunny 2022-05-15 13:32:58 +08:00
parent 1c97f500c6
commit 2ce63dfa9c
3 changed files with 572 additions and 403 deletions
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120
SunnyUI/Controls/UIImageListBox.resx Normal file
View File

@ -0,0 +1,120 @@
<?xml version="1.0" encoding="utf-8"?>
<root>
<!--
Microsoft ResX Schema
Version 2.0
The primary goals of this format is to allow a simple XML format
that is mostly human readable. The generation and parsing of the
various data types are done through the TypeConverter classes
associated with the data types.
Example:
... ado.net/XML headers & schema ...
<resheader name="resmimetype">text/microsoft-resx</resheader>
<resheader name="version">2.0</resheader>
<resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
<resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
<data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
<data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
<data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
<value>[base64 mime encoded serialized .NET Framework object]</value>
</data>
<data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
<value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
<comment>This is a comment</comment>
</data>
There are any number of "resheader" rows that contain simple
name/value pairs.
Each data row contains a name, and value. The row also contains a
type or mimetype. Type corresponds to a .NET class that support
text/value conversion through the TypeConverter architecture.
Classes that don't support this are serialized and stored with the
mimetype set.
The mimetype is used for serialized objects, and tells the
ResXResourceReader how to depersist the object. This is currently not
extensible. For a given mimetype the value must be set accordingly:
Note - application/x-microsoft.net.object.binary.base64 is the format
that the ResXResourceWriter will generate, however the reader can
read any of the formats listed below.
mimetype: application/x-microsoft.net.object.binary.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.soap.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Soap.SoapFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.bytearray.base64
value : The object must be serialized into a byte array
: using a System.ComponentModel.TypeConverter
: and then encoded with base64 encoding.
-->
<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
<xsd:element name="root" msdata:IsDataSet="true">
<xsd:complexType>
<xsd:choice maxOccurs="unbounded">
<xsd:element name="metadata">
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<xsd:attribute name="name" use="required" type="xsd:string" />
<xsd:attribute name="type" type="xsd:string" />
<xsd:attribute name="mimetype" type="xsd:string" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="assembly">
<xsd:complexType>
<xsd:attribute name="alias" type="xsd:string" />
<xsd:attribute name="name" type="xsd:string" />
</xsd:complexType>
</xsd:element>
<xsd:element name="data">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
<xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
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<xsd:attribute ref="xml:space" />
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<resheader name="resmimetype">
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<resheader name="version">
<value>2.0</value>
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<resheader name="reader">
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<resheader name="writer">
<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
</root>

447
SunnyUI/Controls/UIListBox.cs
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@ -28,6 +28,7 @@
* 2022-02-23: V3.1.1 按键上下移动选择项目时，滚动条跟随
* 2022-03-08: V3.1.1 修复在选中某一项后，清除选中项需要两次操作
* 2022-03-19: V3.1.1 重构主题配色
* 2022-05-15: V3.1.8 增加滚动条颜色设置
******************************************************************************/
using System;
@ -93,6 +94,44 @@ namespace Sunny.UI
timer.Start();
}
private Color scrollBarColor = Color.FromArgb(80, 160, 255);
/// <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), "80, 160, 255")]
public Color ScrollBarColor
{
get => scrollBarColor;
set
{
scrollBarColor = value;
bar.HoverColor = bar.PressColor = bar.ForeColor = value;
_style = UIStyle.Custom;
Invalidate();
}
}
private Color scrollBarBackColor = Color.FromArgb(243, 249, 255);
/// <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 ScrollBarBackColor
{
get => scrollBarBackColor;
set
{
scrollBarBackColor = value;
bar.FillColor = value;
_style = UIStyle.Custom;
Invalidate();
}
}
private void Listbox_DrawItem(object sender, DrawItemEventArgs e)
{
DrawItem?.Invoke(sender, e);
@ -393,12 +432,15 @@ namespace Sunny.UI
public override void SetStyleColor(UIBaseStyle uiColor)
{
base.SetStyleColor(uiColor);
if (bar != null)
{
bar.ForeColor = uiColor.ListBarForeColor;
bar.ForeColor = uiColor.PrimaryColor;
bar.HoverColor = uiColor.ButtonFillHoverColor;
bar.PressColor = uiColor.ButtonFillPressColor;
bar.FillColor = uiColor.ListBarFillColor;
bar.FillColor = uiColor.GridBarFillColor;
scrollBarColor = uiColor.PrimaryColor;
scrollBarBackColor = uiColor.GridBarFillColor;
}
hoverColor = uiColor.ListItemHoverColor;
@ -600,405 +642,4 @@ namespace Sunny.UI
return GetItemText(Items[index]);
}
}
/// <summary>
/// ListBox
/// </summary>
[ToolboxItem(false)]
public sealed class ListBoxEx : ListBox
{
private UIScrollBar bar;
/// <summary>
/// Tag字符串
/// </summary>
[DefaultValue(null)]
[Description("获取或设置包含有关控件的数据的对象字符串"), Category("SunnyUI")]
public string TagString { get; set; }
[Browsable(false), DefaultValue(false)]
public bool IsScaled { get; set; }
public void SetDPIScale()
{
if (!IsScaled)
{
this.SetDPIScaleFont();
IsScaled = true;
}
}
public UIScrollBar Bar
{
get => bar;
set
{
bar = value;
SetScrollInfo();
}
}
public int Count => Items.Count;
public ListBoxEx()
{
InitializeComponent();
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);
UpdateStyles();
this.DoubleBuffered();
BorderStyle = BorderStyle.None;
ForeColor = UIFontColor.Primary;
IntegralHeight = false;
Version = UIGlobal.Version;
SetScrollInfo();
}
public event EventHandler ItemsClear;
public event EventHandler ItemsAdd;
public event EventHandler ItemsRemove;
public event EventHandler ItemsInsert;
protected override void WndProc(ref Message m)
{
if (IsDisposed || Disposing) return;
if (IsHandleCreated)
{
const int LB_ADDSTRING = 0x0180;
const int LB_INSERTSTRING = 0x0181;
const int LB_DELETESTRING = 0x0182;
const int LB_RESETCONTENT = 0x0184;
if (m.Msg == LB_RESETCONTENT)
{
ItemsClear?.Invoke(this, EventArgs.Empty);
}
if (m.Msg == LB_DELETESTRING)
{
ItemsRemove?.Invoke(this, EventArgs.Empty);
}
if (m.Msg == LB_ADDSTRING)
{
ItemsAdd?.Invoke(this, EventArgs.Empty);
}
if (m.Msg == LB_INSERTSTRING)
{
ItemsInsert?.Invoke(this, EventArgs.Empty);
}
//if (m.Msg == Win32.User.WM_ERASEBKGND)
//{
// m.Result = IntPtr.Zero;
// return;
//}
}
base.WndProc(ref m);
}
protected override void OnSizeChanged(EventArgs e)
{
if (Bar != null && Bar.Visible)
{
if (Bar.Value != 0)
{
ScrollBarInfo.SetScrollValue(Handle, Bar.Value);
}
}
//SetScrollInfo();
}
protected override void OnSelectedIndexChanged(EventArgs e)
{
base.OnSelectedIndexChanged(e);
SetScrollInfo();
}
public void SetScrollInfo()
{
if (Bar == null)
{
return;
}
var si = ScrollBarInfo.GetInfo(Handle);
if (si.ScrollMax > 0)
{
Bar.Maximum = si.ScrollMax;
Bar.Visible = si.ScrollMax > 0 && si.nMax > 0 && si.nPage > 0;
Bar.Value = si.nPos;
}
else
{
Bar.Visible = false;
}
}
public string Version { get; }
/// <summary>
/// 自定义主题风格
/// </summary>
[DefaultValue(false)]
[Description("获取或设置可以自定义主题风格"), Category("SunnyUI")]
public bool StyleCustomMode { get; set; }
#region 组件设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
SuspendLayout();
//
// UIListBox
//
BorderStyle = BorderStyle.FixedSingle;
DrawMode = DrawMode.OwnerDrawFixed;
Font = UIFontColor.Font();
IntegralHeight = false;
ItemHeight = 25;
Size = new Size(150, 200);
ResumeLayout(false);
}
#endregion 组件设计器生成的代码
private UIStyle _style = UIStyle.Blue;
private Color _itemSelectBackColor = UIColor.Blue;
private Color _itemSelectForeColor = Color.White;
/// <summary>
/// 主题样式
/// </summary>
[DefaultValue(UIStyle.Blue), Description("主题样式"), Category("SunnyUI")]
public UIStyle Style
{
get => _style;
set => SetStyle(value);
}
protected override void OnMouseWheel(MouseEventArgs e)
{
base.OnMouseWheel(e);
if (Bar != null && Bar.Visible)
{
var si = ScrollBarInfo.GetInfo(Handle);
int temp = Math.Abs(e.Delta / 120);
if (e.Delta > 10)
{
int nposnum = si.nPos - temp * SystemInformation.MouseWheelScrollLines;
ScrollBarInfo.SetScrollValue(Handle, nposnum >= si.nMin ? nposnum : 0);
}
else if (e.Delta < -10)
{
int nposnum = si.nPos + temp * SystemInformation.MouseWheelScrollLines;
ScrollBarInfo.SetScrollValue(Handle, nposnum <= si.ScrollMax ? nposnum : si.ScrollMax);
}
SetScrollInfo();
}
}
public void SetStyle(UIStyle style)
{
if (!style.IsCustom())
{
SetStyleColor(style.Colors());
Invalidate();
}
_style = style;
}
public void SetStyleColor(UIBaseStyle uiColor)
{
ItemSelectBackColor = uiColor.ListItemSelectBackColor;
ItemSelectForeColor = uiColor.ListItemSelectForeColor;
}
[Category("SunnyUI"), Description("The border color used to paint the control.")]
public Color ItemSelectBackColor
{
get => _itemSelectBackColor;
set
{
if (_itemSelectBackColor != value)
{
_itemSelectBackColor = value;
_style = UIStyle.Custom;
if (DesignMode)
Invalidate();
}
}
}
[Category("SunnyUI"), Description("The border color used to paint the control.")]
public Color ItemSelectForeColor
{
get => _itemSelectForeColor;
set
{
if (_itemSelectForeColor != value)
{
_itemSelectForeColor = value;
_style = UIStyle.Custom;
if (DesignMode)
Invalidate();
}
}
}
public delegate void OnBeforeDrawItem(object sender, ObjectCollection items, DrawItemEventArgs e);
public event OnBeforeDrawItem BeforeDrawItem;
public event OnBeforeDrawItem AfterDrawItem;
private StringAlignment textAlignment = StringAlignment.Near;
public StringAlignment TextAlignment
{
get => textAlignment;
set
{
textAlignment = value;
Invalidate();
}
}
protected override void OnDrawItem(DrawItemEventArgs e)
{
BeforeDrawItem?.Invoke(this, Items, e);
if (Items.Count == 0)
{
return;
}
bool otherState = e.State == DrawItemState.Grayed || e.State == DrawItemState.HotLight;
if (!otherState)
{
e.DrawBackground();
}
if (e.Index < 0 || e.Index >= Items.Count)
{
return;
}
StringFormat sStringFormat = new StringFormat();
sStringFormat.LineAlignment = StringAlignment.Center;
sStringFormat.Alignment = textAlignment;
bool isSelected = (e.State & DrawItemState.Selected) == DrawItemState.Selected;
Color backColor = isSelected ? ItemSelectBackColor : BackColor;
Color foreColor = isSelected ? ItemSelectForeColor : ForeColor;
Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width - 1, e.Bounds.Height - 1);
string showText = DisplayMember.IsNullOrEmpty() ? Items[e.Index].ToString() : GetItemText(Items[e.Index]);
if (!otherState)
{
e.Graphics.FillRectangle(BackColor, e.Bounds);
e.Graphics.FillRectangle(backColor, rect);
e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, sStringFormat);
}
else
{
if (e.State == DrawItemState.Grayed)
{
backColor = BackColor;
foreColor = ForeColor;
}
if (e.State == DrawItemState.HotLight)
{
backColor = HoverColor;
foreColor = ForeColor;
}
e.Graphics.FillRectangle(BackColor, e.Bounds);
e.Graphics.FillRectangle(backColor, rect);
e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, sStringFormat);
}
AfterDrawItem?.Invoke(this, Items, e);
base.OnDrawItem(e);
}
private Color hoverColor = Color.FromArgb(155, 200, 255);
[DefaultValue(typeof(Color), "155, 200, 255")]
public Color HoverColor
{
get => hoverColor;
set
{
hoverColor = value;
_style = UIStyle.Custom;
}
}
protected override void OnMeasureItem(MeasureItemEventArgs e)
{
base.OnMeasureItem(e);
e.ItemHeight += ItemHeight;
}
public void SelectedFirst()
{
if (Items.Count > 0 && SelectedIndex < 0)
{
SelectedIndex = 0;
}
}
private int lastIndex = -1;
private int mouseIndex = -1;
[Browsable(false)]
public int MouseIndex
{
get => mouseIndex;
set
{
if (mouseIndex != value)
{
if (lastIndex >= 0 && lastIndex >= 0 && lastIndex < Items.Count && lastIndex != SelectedIndex)
{
OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(lastIndex), lastIndex, DrawItemState.Grayed));
}
mouseIndex = value;
if (mouseIndex >= 0 && mouseIndex >= 0 && mouseIndex < Items.Count && mouseIndex != SelectedIndex)
{
OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(value), value, DrawItemState.HotLight));
}
lastIndex = mouseIndex;
}
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (SelectionMode != SelectionMode.One) return;
MouseIndex = IndexFromPoint(e.Location);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
if (SelectionMode != SelectionMode.One) return;
MouseIndex = -1;
}
}
}

408
SunnyUI/Controls/UIListBoxEx.cs Normal file
View File

@ -0,0 +1,408 @@
using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
namespace Sunny.UI
{
/// <summary>
/// ListBox
/// </summary>
[ToolboxItem(false)]
internal sealed class ListBoxEx : ListBox
{
private UIScrollBar bar;
/// <summary>
/// Tag字符串
/// </summary>
[DefaultValue(null)]
[Description("获取或设置包含有关控件的数据的对象字符串"), Category("SunnyUI")]
public string TagString { get; set; }
[Browsable(false), DefaultValue(false)]
public bool IsScaled { get; set; }
public void SetDPIScale()
{
if (!IsScaled)
{
this.SetDPIScaleFont();
IsScaled = true;
}
}
public UIScrollBar Bar
{
get => bar;
set
{
bar = value;
SetScrollInfo();
}
}
public int Count => Items.Count;
public ListBoxEx()
{
InitializeComponent();
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);
UpdateStyles();
this.DoubleBuffered();
BorderStyle = BorderStyle.None;
ForeColor = UIFontColor.Primary;
IntegralHeight = false;
Version = UIGlobal.Version;
SetScrollInfo();
}
public event EventHandler ItemsClear;
public event EventHandler ItemsAdd;
public event EventHandler ItemsRemove;
public event EventHandler ItemsInsert;
protected override void WndProc(ref Message m)
{
if (IsDisposed || Disposing) return;
if (IsHandleCreated)
{
const int LB_ADDSTRING = 0x0180;
const int LB_INSERTSTRING = 0x0181;
const int LB_DELETESTRING = 0x0182;
const int LB_RESETCONTENT = 0x0184;
if (m.Msg == LB_RESETCONTENT)
{
ItemsClear?.Invoke(this, EventArgs.Empty);
}
if (m.Msg == LB_DELETESTRING)
{
ItemsRemove?.Invoke(this, EventArgs.Empty);
}
if (m.Msg == LB_ADDSTRING)
{
ItemsAdd?.Invoke(this, EventArgs.Empty);
}
if (m.Msg == LB_INSERTSTRING)
{
ItemsInsert?.Invoke(this, EventArgs.Empty);
}
//if (m.Msg == Win32.User.WM_ERASEBKGND)
//{
// m.Result = IntPtr.Zero;
// return;
//}
}
base.WndProc(ref m);
}
protected override void OnSizeChanged(EventArgs e)
{
if (Bar != null && Bar.Visible)
{
if (Bar.Value != 0)
{
ScrollBarInfo.SetScrollValue(Handle, Bar.Value);
}
}
//SetScrollInfo();
}
protected override void OnSelectedIndexChanged(EventArgs e)
{
base.OnSelectedIndexChanged(e);
SetScrollInfo();
}
public void SetScrollInfo()
{
if (Bar == null)
{
return;
}
var si = ScrollBarInfo.GetInfo(Handle);
if (si.ScrollMax > 0)
{
Bar.Maximum = si.ScrollMax;
Bar.Visible = si.ScrollMax > 0 && si.nMax > 0 && si.nPage > 0;
Bar.Value = si.nPos;
}
else
{
Bar.Visible = false;
}
}
public string Version { get; }
/// <summary>
/// 自定义主题风格
/// </summary>
[DefaultValue(false)]
[Description("获取或设置可以自定义主题风格"), Category("SunnyUI")]
public bool StyleCustomMode { get; set; }
#region 组件设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
SuspendLayout();
//
// UIListBox
//
BorderStyle = BorderStyle.FixedSingle;
DrawMode = DrawMode.OwnerDrawFixed;
Font = UIFontColor.Font();
IntegralHeight = false;
ItemHeight = 25;
Size = new Size(150, 200);
ResumeLayout(false);
}
#endregion 组件设计器生成的代码
private UIStyle _style = UIStyle.Blue;
private Color _itemSelectBackColor = UIColor.Blue;
private Color _itemSelectForeColor = Color.White;
/// <summary>
/// 主题样式
/// </summary>
[DefaultValue(UIStyle.Blue), Description("主题样式"), Category("SunnyUI")]
public UIStyle Style
{
get => _style;
set => SetStyle(value);
}
protected override void OnMouseWheel(MouseEventArgs e)
{
base.OnMouseWheel(e);
if (Bar != null && Bar.Visible)
{
var si = ScrollBarInfo.GetInfo(Handle);
int temp = Math.Abs(e.Delta / 120);
if (e.Delta > 10)
{
int nposnum = si.nPos - temp * SystemInformation.MouseWheelScrollLines;
ScrollBarInfo.SetScrollValue(Handle, nposnum >= si.nMin ? nposnum : 0);
}
else if (e.Delta < -10)
{
int nposnum = si.nPos + temp * SystemInformation.MouseWheelScrollLines;
ScrollBarInfo.SetScrollValue(Handle, nposnum <= si.ScrollMax ? nposnum : si.ScrollMax);
}
SetScrollInfo();
}
}
public void SetStyle(UIStyle style)
{
if (!style.IsCustom())
{
SetStyleColor(style.Colors());
Invalidate();
}
_style = style;
}
public void SetStyleColor(UIBaseStyle uiColor)
{
ItemSelectBackColor = uiColor.ListItemSelectBackColor;
ItemSelectForeColor = uiColor.ListItemSelectForeColor;
}
[Category("SunnyUI"), Description("The border color used to paint the control.")]
public Color ItemSelectBackColor
{
get => _itemSelectBackColor;
set
{
if (_itemSelectBackColor != value)
{
_itemSelectBackColor = value;
_style = UIStyle.Custom;
if (DesignMode)
Invalidate();
}
}
}
[Category("SunnyUI"), Description("The border color used to paint the control.")]
public Color ItemSelectForeColor
{
get => _itemSelectForeColor;
set
{
if (_itemSelectForeColor != value)
{
_itemSelectForeColor = value;
_style = UIStyle.Custom;
if (DesignMode)
Invalidate();
}
}
}
public delegate void OnBeforeDrawItem(object sender, ObjectCollection items, DrawItemEventArgs e);
public event OnBeforeDrawItem BeforeDrawItem;
public event OnBeforeDrawItem AfterDrawItem;
private StringAlignment textAlignment = StringAlignment.Near;
public StringAlignment TextAlignment
{
get => textAlignment;
set
{
textAlignment = value;
Invalidate();
}
}
protected override void OnDrawItem(DrawItemEventArgs e)
{
BeforeDrawItem?.Invoke(this, Items, e);
if (Items.Count == 0)
{
return;
}
bool otherState = e.State == DrawItemState.Grayed || e.State == DrawItemState.HotLight;
if (!otherState)
{
e.DrawBackground();
}
if (e.Index < 0 || e.Index >= Items.Count)
{
return;
}
StringFormat sStringFormat = new StringFormat();
sStringFormat.LineAlignment = StringAlignment.Center;
sStringFormat.Alignment = textAlignment;
bool isSelected = (e.State & DrawItemState.Selected) == DrawItemState.Selected;
Color backColor = isSelected ? ItemSelectBackColor : BackColor;
Color foreColor = isSelected ? ItemSelectForeColor : ForeColor;
Rectangle rect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width - 1, e.Bounds.Height - 1);
string showText = DisplayMember.IsNullOrEmpty() ? Items[e.Index].ToString() : GetItemText(Items[e.Index]);
if (!otherState)
{
e.Graphics.FillRectangle(BackColor, e.Bounds);
e.Graphics.FillRectangle(backColor, rect);
e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, sStringFormat);
}
else
{
if (e.State == DrawItemState.Grayed)
{
backColor = BackColor;
foreColor = ForeColor;
}
if (e.State == DrawItemState.HotLight)
{
backColor = HoverColor;
foreColor = ForeColor;
}
e.Graphics.FillRectangle(BackColor, e.Bounds);
e.Graphics.FillRectangle(backColor, rect);
e.Graphics.DrawString(showText, e.Font, foreColor, e.Bounds, sStringFormat);
}
AfterDrawItem?.Invoke(this, Items, e);
base.OnDrawItem(e);
}
private Color hoverColor = Color.FromArgb(155, 200, 255);
[DefaultValue(typeof(Color), "155, 200, 255")]
public Color HoverColor
{
get => hoverColor;
set
{
hoverColor = value;
_style = UIStyle.Custom;
}
}
protected override void OnMeasureItem(MeasureItemEventArgs e)
{
base.OnMeasureItem(e);
e.ItemHeight += ItemHeight;
}
public void SelectedFirst()
{
if (Items.Count > 0 && SelectedIndex < 0)
{
SelectedIndex = 0;
}
}
private int lastIndex = -1;
private int mouseIndex = -1;
[Browsable(false)]
public int MouseIndex
{
get => mouseIndex;
set
{
if (mouseIndex != value)
{
if (lastIndex >= 0 && lastIndex >= 0 && lastIndex < Items.Count && lastIndex != SelectedIndex)
{
OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(lastIndex), lastIndex, DrawItemState.Grayed));
}
mouseIndex = value;
if (mouseIndex >= 0 && mouseIndex >= 0 && mouseIndex < Items.Count && mouseIndex != SelectedIndex)
{
OnDrawItem(new DrawItemEventArgs(CreateGraphics(), Font, GetItemRectangle(value), value, DrawItemState.HotLight));
}
lastIndex = mouseIndex;
}
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (SelectionMode != SelectionMode.One) return;
MouseIndex = IndexFromPoint(e.Location);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
if (SelectionMode != SelectionMode.One) return;
MouseIndex = -1;
}
}
}