Gradient Button
/*
Code revised from chapter 5
GDI+ Custom Controls with Visual C# 2005
By Iulian Serban, Dragos Brezoi, Tiberiu Radu, Adam Ward
Language English
Paperback 272 pages [191mm x 235mm]
Release date July 2006
ISBN 1904811604
Sample chapter
http://www.packtpub.com/files/1604_CustomControls_SampleChapter.pdf
For More info on GDI+ Custom Control with Microsoft Visual C# book
visit website www.packtpub.com
*/
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private System.ComponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.gradientButton1 = new GradientButton();
this.SuspendLayout();
//
// gradientButton1
//
this.gradientButton1.BackColor = System.Drawing.SystemColors.ControlDark;
this.gradientButton1.BorderStyle = System.Windows.Forms.Border3DStyle.Raised;
this.gradientButton1.EndColor = System.Drawing.SystemColors.ActiveCaption;
this.gradientButton1.Location = new System.Drawing.Point(91, 53);
this.gradientButton1.Name = "gradientButton1";
this.gradientButton1.Size = new System.Drawing.Size(100, 40);
this.gradientButton1.StartColor = System.Drawing.SystemColors.ControlLightLight;
this.gradientButton1.TabIndex = 0;
this.gradientButton1.Text = "Gradient Button";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Center;
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.Add(this.gradientButton1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
private GradientButton gradientButton1;
private void controlPart2_Click(object sender, EventArgs e)
{
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
public partial class GradientButton : BorderGradientPanel
{
public GradientButton()
{
UpdateAppearance();
InitializeComponent();
}
private bool clicked = false;
private void UpdateAppearance()
{
if (clicked)
{
StartColor = SystemColors.Control;
EndColor = SystemColors.ControlLight;
BorderStyle = Border3DStyle.Sunken;
}
else
{
StartColor = SystemColors.ControlLight;
EndColor = SystemColors.Control;
BorderStyle = Border3DStyle.Raised;
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
clicked = true;
UpdateAppearance();
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
clicked = false;
UpdateAppearance();
}
}
protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
Brush foreBrush = new SolidBrush(ForeColor);
SizeF size = pe.Graphics.MeasureString(Text, Font);
PointF pt = new PointF((Width - size.Width) / 2, (Height - size.Height) / 2);
if (clicked)
{
pt.X += 2;
pt.Y += 2;
}
pe.Graphics.DrawString(Text, Font, foreBrush, pt);
foreBrush.Dispose();
}
private System.ComponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
private void InitializeComponent()
{
components = new System.ComponentModel.Container();
//this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
}
#endregion
}
public partial class BorderGradientPanel : Control
{
private Border3DStyle borderStyle = Border3DStyle.Sunken;
private Color startColor = SystemColors.Control;
private Color endColor = SystemColors.Control;
public Color EndColor
{
get
{
return endColor;
}
set
{
if (endColor != value)
{
endColor = value;
Invalidate();
}
}
}
public Color StartColor
{
get
{
return startColor;
}
set
{
if (startColor != value)
{
startColor = value;
Invalidate();
}
}
}
public Border3DStyle BorderStyle
{
get
{
return borderStyle;
}
set
{
if (borderStyle != value)
{
borderStyle = value;
Invalidate();
}
}
}
public BorderGradientPanel()
{
SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw, true);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
LinearGradientBrush brush = new LinearGradientBrush(new Point(0, 0), new Point(0, Height), startColor, endColor);
e.Graphics.FillRectangle(brush, ClientRectangle);
ControlPaint.DrawBorder3D(e.Graphics, ClientRectangle, borderStyle);
brush.Dispose();
}
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
components = new System.ComponentModel.Container();
//this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
}
#endregion
}
public class ScrollArrowButton : ControlPart
{
protected override void RenderControl(Graphics g, ButtonState buttonState, CheckState checkState)
{
//ControlPaint.DrawScrollButton(g, ClientRectangle, ScrollButton.Up,buttonState);
ControlPaint.DrawScrollButton(g, ClientRectangle, sButton, buttonState);
}
private ScrollButton sButton = ScrollButton.Up;
public ScrollButton ButtonType
{
get
{
return sButton;
}
set
{
if (sButton != value)
{
sButton = value;
Invalidate();
}
}
}
}
public class CheckButton : ControlPart
{
protected override void RenderControl(Graphics g, ButtonState buttonState, CheckState checkState)
{
ButtonState bstate = buttonState;
switch (checkState)
{
case CheckState.Checked: bstate = ButtonState.Checked; break;
case CheckState.Indeterminate: bstate = ButtonState.All; break;
}
ControlPaint.DrawCheckBox(g, ClientRectangle, bstate);
}
}
public class ControlPart : Control
{
private ButtonState buttonState = ButtonState.Flat;
private CheckState checkState = CheckState.Unchecked;
//indicates wheter the mouse is hovering over the control
protected bool mouseOver = false;
public ControlPart()
{
SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw, true);
}
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
buttonState = ButtonState.Normal;
mouseOver = true;
Invalidate(true);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
buttonState = ButtonState.Flat;
mouseOver = false;
Invalidate(true);
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
this.Focus();
if (!(e.Button == MouseButtons.Left)) return;
buttonState = ButtonState.Pushed;
switch (checkState)
{
case CheckState.Checked: checkState = CheckState.Unchecked; break;
case CheckState.Unchecked: checkState = CheckState.Checked; break;
case CheckState.Indeterminate: checkState = CheckState.Unchecked; break;
}
Invalidate(true);
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
if (!((e.Button & MouseButtons.Left) == MouseButtons.Left)) return;
buttonState = ButtonState.Normal;
Invalidate(true);
}
protected virtual void RenderControl(Graphics g, ButtonState buttonState, CheckState checkState)
{
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
RenderControl(e.Graphics, buttonState, checkState);
}
}
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