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LanYun2022LanYun2022
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更改组合框样式
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‎ContextMenuManager/BluePointLilac.Controls/RComboBox.cs‎

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using System;
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using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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using System.Windows.Forms;
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using Svg;
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namespace BluePointLilac.Controls
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{
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public class RComboBox : ComboBox
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{
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private Color borderColor = Color.FromArgb(210, 210, 215);
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private Color hoverBorderColor = Color.FromArgb(255, 145, 60);
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private Color focusBorderColor = Color.FromArgb(255, 107, 0);
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private Color backgroundColor = Color.FromArgb(250, 250, 252);
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private Color arrowColor = Color.FromArgb(100, 100, 100);
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private Color hoverArrowColor = Color.FromArgb(255, 107, 0);
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private Color buttonColor = Color.FromArgb(250, 250, 252);
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private bool isHovered = false;
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private bool isFocused = false;
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private int borderRadius = 8;
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private Bitmap cachedArrowBitmap;
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private Color lastArrowColor = Color.Empty;
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private Rectangle arrowRect;
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private Timer animationTimer;
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private float currentBorderWidth = 1.2f;
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private float targetBorderWidth = 1.2f;
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private Color currentBorderColor;
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private Color targetBorderColor;
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private float arrowScale = 1.0f;
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private float targetArrowScale = 1.0f;
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private bool isPainting = false;
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public RComboBox()
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{
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SetStyle(ControlStyles.ResizeRedraw | ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint, true);
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DrawMode = DrawMode.OwnerDrawFixed;
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DropDownStyle = ComboBoxStyle.DropDownList;
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IntegralHeight = false; // 防止下拉菜单高度问题
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BackColor = MyMainForm.ButtonMain;
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ForeColor = MyMainForm.FormFore;
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InitializeColors();
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InitializeAnimation();
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UpdateArrowRect();
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// 事件处理
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MouseEnter += (s, e) => { isHovered = true; UpdateAnimationTargets(); Invalidate(); };
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MouseLeave += (s, e) => { isHovered = false; UpdateAnimationTargets(); Invalidate(); };
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GotFocus += (s, e) => { isFocused = true; UpdateAnimationTargets(); Invalidate(); };
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LostFocus += (s, e) => { isFocused = false; UpdateAnimationTargets(); Invalidate(); };
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// 修复下拉菜单显示问题
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DropDown += OnDropDown;
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}
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[DefaultValue(typeof(Color), "210, 210, 215")]
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public Color BorderColor
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{
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get => borderColor;
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set { borderColor = value; Invalidate(); }
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}
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[DefaultValue(typeof(Color), "255, 255, 255")]
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public Color ButtonColor
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{
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get => buttonColor;
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set { buttonColor = backgroundColor = value; Invalidate(); }
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}
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[DefaultValue(typeof(Color), "100, 100, 100")]
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public Color ArrowColor
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{
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get => arrowColor;
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set { arrowColor = value; Invalidate(); }
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}
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[DefaultValue(8)]
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public int BorderRadius
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{
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get => borderRadius;
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set { borderRadius = value; Invalidate(); }
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}
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private void InitializeAnimation()
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{
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animationTimer = new Timer { Interval = 32 };
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animationTimer.Tick += (s, e) => UpdateAnimation();
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animationTimer.Start();
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currentBorderColor = targetBorderColor = borderColor;
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}
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private void UpdateAnimation()
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{
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if (isPainting || !Visible) return;
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bool needsUpdate = false;
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if (Math.Abs(currentBorderWidth - targetBorderWidth) > 0.05f)
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{
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currentBorderWidth += (targetBorderWidth - currentBorderWidth) * 0.2f;
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needsUpdate = true;
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}
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if (currentBorderColor != targetBorderColor)
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{
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currentBorderColor = ColorLerp(currentBorderColor, targetBorderColor, 0.15f);
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needsUpdate = true;
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}
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if (Math.Abs(arrowScale - targetArrowScale) > 0.05f)
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{
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arrowScale += (targetArrowScale - arrowScale) * 0.3f;
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needsUpdate = true;
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}
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if (needsUpdate) Invalidate();
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}
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private Color ColorLerp(Color c1, Color c2, float t) => Color.FromArgb(
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(int)(c1.R + (c2.R - c1.R) * t),
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(int)(c1.G + (c2.G - c1.G) * t),
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(int)(c1.B + (c2.B - c1.B) * t)
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);
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private void UpdateAnimationTargets()
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{
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targetBorderWidth = isFocused ? 2.2f : isHovered ? 1.8f : 1.2f;
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targetBorderColor = isFocused ? focusBorderColor : isHovered ? hoverBorderColor : borderColor;
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targetArrowScale = isHovered ? 1.1f : 1.0f;
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}
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private void InitializeColors()
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{
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borderColor = buttonColor = backgroundColor = MyMainForm.ButtonMain;
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arrowColor = ForeColor = MyMainForm.FormFore;
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if (MyMainForm.IsDarkTheme())
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{
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hoverBorderColor = Color.FromArgb(255, 145, 60);
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focusBorderColor = Color.FromArgb(255, 107, 0);
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hoverArrowColor = Color.FromArgb(255, 107, 0);
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}
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else
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{
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hoverBorderColor = Color.FromArgb(255, 145, 60);
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focusBorderColor = Color.FromArgb(255, 107, 0);
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hoverArrowColor = Color.FromArgb(255, 107, 0);
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}
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currentBorderColor = targetBorderColor = borderColor;
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}
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private void UpdateArrowRect()
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{
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int size = 16, margin = 8;
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arrowRect = new Rectangle(Width - size - margin, (Height - size) / 2, size, size);
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}
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protected override void OnPaint(PaintEventArgs e)
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{
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if (isPainting) return;
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isPainting = true;
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try
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{
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var g = e.Graphics;
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g.SmoothingMode = SmoothingMode.AntiAlias;
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g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
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// 清除背景
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using (var brush = new SolidBrush(Parent?.BackColor ?? SystemColors.Control))
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g.FillRectangle(brush, ClientRectangle);
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// 绘制背景和边框
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using (var path = CreateRoundedRectanglePath(ClientRectangle, borderRadius))
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using (var brush = new SolidBrush(backgroundColor))
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g.FillPath(brush, path);
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using (var path = CreateRoundedRectanglePath(new Rectangle(0, 0, Width - 1, Height - 1), borderRadius))
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using (var pen = new Pen(currentBorderColor, currentBorderWidth))
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g.DrawPath(pen, path);
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// 绘制文本
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var text = SelectedItem?.ToString() ?? (Items.Count > 0 ? Items[0].ToString() : "");
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if (!string.IsNullOrEmpty(text))
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{
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using (var brush = new SolidBrush(ForeColor))
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{
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var textRect = new Rectangle(12, 0, Width - arrowRect.Width - 20, Height);
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var format = new StringFormat { LineAlignment = StringAlignment.Center, Trimming = StringTrimming.EllipsisCharacter };
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g.DrawString(text, Font, brush, textRect, format);
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}
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}
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// 绘制箭头
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DrawArrowIcon(g, arrowRect);
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}
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finally { isPainting = false; }
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}
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protected override void OnDrawItem(DrawItemEventArgs e)
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{
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if (e.Index < 0) return;
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var isSelected = (e.State & DrawItemState.Selected) == DrawItemState.Selected;
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var backColor = isSelected ? Color.FromArgb(255, 235, 225) : BackColor;
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var textColor = isSelected ? Color.FromArgb(255, 107, 0) : ForeColor;
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// 绘制背景
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e.Graphics.FillRectangle(new SolidBrush(backColor), e.Bounds);
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// 绘制文本
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using (var brush = new SolidBrush(textColor))
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{
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var textRect = new Rectangle(e.Bounds.X + 8, e.Bounds.Y, e.Bounds.Width - 16, e.Bounds.Height);
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var format = new StringFormat { LineAlignment = StringAlignment.Center, Trimming = StringTrimming.EllipsisCharacter };
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e.Graphics.DrawString(GetItemText(Items[e.Index]), Font, brush, textRect, format);
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}
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// 绘制焦点框
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if ((e.State & DrawItemState.Focus) == DrawItemState.Focus)
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e.DrawFocusRectangle();
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}
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private void DrawArrowIcon(Graphics g, Rectangle iconRect)
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{
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if (iconRect.Width <= 0) UpdateArrowRect();
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var color = isHovered || isFocused ? hoverArrowColor : arrowColor;
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if (cachedArrowBitmap == null || lastArrowColor != color)
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{
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cachedArrowBitmap?.Dispose();
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cachedArrowBitmap = GenerateArrowIcon(iconRect.Size, color);
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lastArrowColor = color;
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}
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if (cachedArrowBitmap != null)
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{
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var rect = new Rectangle(
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iconRect.X + (int)(iconRect.Width * (1 - arrowScale) / 2),
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iconRect.Y + (int)(iconRect.Height * (1 - arrowScale) / 2),
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(int)(iconRect.Width * arrowScale),
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(int)(iconRect.Height * arrowScale)
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);
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g.DrawImage(cachedArrowBitmap, rect);
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}
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}
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private Bitmap GenerateArrowIcon(Size size, Color color)
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{
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try
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{
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var svg = new SvgDocument { Width = size.Width, Height = size.Height, ViewBox = new SvgViewBox(0, 0, 24, 24) };
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svg.Children.Add(new SvgPath
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{
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PathData = SvgPathBuilder.Parse("M7 10l5 5 5-5z"),
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Fill = new SvgColourServer(color)
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});
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return svg.Draw(size.Width, size.Height);
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}
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catch
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{
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return GenerateFallbackArrowIcon(size, color);
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}
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}
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private Bitmap GenerateFallbackArrowIcon(Size size, Color color)
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{
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var bmp = new Bitmap(size.Width, size.Height);
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using (var g = Graphics.FromImage(bmp))
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{
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g.SmoothingMode = SmoothingMode.AntiAlias;
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var points = new[] {
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new Point(size.Width / 4, size.Height / 3),
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new Point(size.Width * 3 / 4, size.Height / 3),
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new Point(size.Width / 2, size.Height * 2 / 3)
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};
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g.FillPolygon(new SolidBrush(color), points);
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}
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return bmp;
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}
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private GraphicsPath CreateRoundedRectanglePath(Rectangle rect, int radius)
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{
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var path = new GraphicsPath();
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float diam = radius * 2f;
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if (diam > rect.Width) diam = rect.Width;
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if (diam > rect.Height) diam = rect.Height;
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path.AddArc(rect.X, rect.Y, diam, diam, 180, 90);
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path.AddArc(rect.Right - diam, rect.Y, diam, diam, 270, 90);
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path.AddArc(rect.Right - diam, rect.Bottom - diam, diam, diam, 0, 90);
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path.AddArc(rect.X, rect.Bottom - diam, diam, diam, 90, 90);
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path.CloseFigure();
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return path;
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}
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// 修复下拉菜单显示问题的关键方法
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private void OnDropDown(object sender, EventArgs e)
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{
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// 确保下拉列表正常显示
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BeginInvoke(new Action(() => {
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if (DroppedDown)
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{
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// 强制重绘以确保下拉列表正确显示
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Invalidate();
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}
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}));
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}
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// 重写 WndProc 以确保鼠标事件正确处理
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protected override void WndProc(ref Message m)
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{
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const int WM_LBUTTONDOWN = 0x201;
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const int WM_LBUTTONUP = 0x202;
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if (m.Msg == WM_LBUTTONDOWN)
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{
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// 确保点击时下拉列表正常显示
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if (!DroppedDown)
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{
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DroppedDown = true;
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return;
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}
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}
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else if (m.Msg == WM_LBUTTONUP)
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{
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// 允许正常的鼠标释放处理
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base.WndProc(ref m);
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return;
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}
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base.WndProc(ref m);
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}
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protected override void OnResize(EventArgs e)
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{
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base.OnResize(e);
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UpdateArrowRect();
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cachedArrowBitmap?.Dispose();
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cachedArrowBitmap = null;
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Invalidate();
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}
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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animationTimer?.Stop();
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animationTimer?.Dispose();
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cachedArrowBitmap?.Dispose();
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}
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base.Dispose(disposing);
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}
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}
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}

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