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IconButton.cs
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191 lines (148 loc) · 3.68 KB
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using System;
using System.ComponentModel;
using System.Diagnostics.Contracts;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Windows.Forms.Design;
namespace ReClassNET.Controls
{
/// <summary>
/// Based on <see cref="ToolStripButton" />.
/// </summary>
[DefaultEvent("Click")]
public class IconButton : Panel
{
public bool Pressed { get; set; }
public bool Selected { get; set; }
public Image Image { get; set; }
public Rectangle ImageRectangle { get; } = new Rectangle(3, 3, 16, 16);
private readonly ProfessionalColorTable colorTable = new ProfessionalColorTable();
public IconButton()
{
DoubleBuffered = true;
}
protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)
{
base.SetBoundsCore(x, y, 23, 22, specified);
}
protected override void Select(bool directed, bool forward)
{
base.Select(directed, forward);
Selected = true;
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
Pressed = true;
Invalidate();
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
Pressed = false;
Invalidate();
}
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
Selected = true;
Invalidate();
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
Selected = false;
Pressed = false;
Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
RenderButtonBackground(e.Graphics);
RenderImage(e.Graphics);
}
private void RenderButtonBackground(Graphics g)
{
Contract.Requires(g != null);
var bounds = new Rectangle(Point.Empty, Size);
var drawHotBorder = true;
if (Pressed)
{
RenderPressedButtonFill(g, bounds);
}
else if (Selected)
{
RenderSelectedButtonFill(g, bounds);
}
else
{
drawHotBorder = false;
using var brush = new SolidBrush(BackColor);
g.FillRectangle(brush, bounds);
}
if (drawHotBorder)
{
using var pen = new Pen(colorTable.ButtonSelectedBorder);
g.DrawRectangle(pen, bounds.X, bounds.Y, bounds.Width - 1, bounds.Height - 1);
}
}
private void RenderPressedButtonFill(Graphics g, Rectangle bounds)
{
Contract.Requires(g != null);
if (bounds.Width == 0 || bounds.Height == 0)
{
return;
}
using var brush = new LinearGradientBrush(bounds, colorTable.ButtonPressedGradientBegin, colorTable.ButtonPressedGradientEnd, LinearGradientMode.Vertical);
g.FillRectangle(brush, bounds);
}
private void RenderSelectedButtonFill(Graphics g, Rectangle bounds)
{
Contract.Requires(g != null);
if (bounds.Width == 0 || bounds.Height == 0)
{
return;
}
using var brush = new LinearGradientBrush(bounds, colorTable.ButtonSelectedGradientBegin, colorTable.ButtonSelectedGradientEnd, LinearGradientMode.Vertical);
g.FillRectangle(brush, bounds);
}
private void RenderImage(Graphics g)
{
Contract.Requires(g != null);
var image = Image;
if (image == null)
{
return;
}
var imageRect = ImageRectangle;
if (!Enabled)
{
var disposeImage = false;
if (Pressed)
{
imageRect.X += 1;
}
if (!Enabled)
{
image = ToolStripRenderer.CreateDisabledImage(image);
disposeImage = true;
}
g.DrawImage(image, imageRect);
if (disposeImage)
{
image.Dispose();
}
return;
}
g.DrawImage(image, imageRect);
}
}
internal class IconButtonDesigner : ControlDesigner
{
private IconButtonDesigner()
{
AutoResizeHandles = true;
}
public override SelectionRules SelectionRules => SelectionRules.Moveable;
}
}