从0自学C#01–自绘窗体边框
1.先设置窗体为无边框模式
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
也可以右击窗体,选择属性,找到FormBorderStyler设置为None。此时窗体右上角的最小化、最大化和关闭按钮会消失,鼠标拖动窗体的功能也会消失,这些会在第4步添加。
2.绘制边框
选择当前项目右击,添加组件,让组件类Component1继承Panel类,然后重写OnPaint(PaintEventArgs e),绘制边框颜色。生成解决方案,该组件会自动添加到工具箱里,组件栏下。类代码如下:
public partial class Component1 : Panel { public Component1() { InitializeComponent(); } public Component1(IContainer container) { container.Add(this); InitializeComponent(); } protected override void OnPaint(PaintEventArgs e) { ControlPaint.DrawBorder(e.Graphics, this.ClientRectangle, Color.FromArgb(00,59,96), 2, ButtonBorderStyle.Solid, Color.FromArgb(00,59,96), 2, ButtonBorderStyle.Solid, Color.FromArgb(00,59,96), 2, ButtonBorderStyle.Solid, Color.FromArgb(00,59,96), 2, ButtonBorderStyle.Solid); base.OnPaint(e); } }
Color.FromArgb(00,59,96)设置边框颜色,2设置边框尺寸。
注:如果不知道设置什么rgb值,使得颜色好看。可以去网上下载一个屏幕取色器,读出你认为好看颜色的rbg值。
3.添加边框
将组件Component1添加到窗体,设置其Dock属性为Fill。然后设置Padding属性为2,2,2,2(与边框尺寸对应)。也可以动态实现,代码如下:
this.component11.Dock = System.Windows.Forms.DockStyle.Fill; this.component11.Padding = new System.Windows.Forms.Padding(2);
4.添加窗体关闭、最小化,鼠标拖动功能
在窗体组件this.Component11上,添加Panel,设置其Dock属性为Top,自定义背景颜色为0,102,171,前景色为Transparent。
this.panel1.Dock = System.Windows.Forms.DockStyle.Top; this.panel1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(102)))), ((int)(((byte)(171))))); this.panel1.ForeColor = System.Drawing.Color.Transparent;
然后在Pannel上添加两个label,设置其Text分别为__和X,为最小化和最大化图标。字体设置为微软雅黑、粗体、小五号。最后给Pannel添加MouseDown和MouseMove事件。给label添加Click事件,添加MouseEnter和MouseLeave事件,使得鼠标移动到图标上时,鼠标变为手型。
Point mouseOffSet;private void panel1_MouseDown(object sender, MouseEventArgs e) { mouseOffSet = new Point(-e.X, -e.Y); }private void panel1_MouseMove(object sender, MouseEventArgs e) { if (e.Button == MouseButtons.Left) { Point mousePosition = Control.MousePosition; mousePosition.Offset(mouseOffSet.X, mouseOffSet.Y); Location = mousePosition; } }private void labelMinimize_Click(object sender, EventArgs e) { this.WindowState = FormWindowState.Minimized; }private void labelClose_Click(object sender, EventArgs e) { this.Close(); this.Dispose(); Application.Exit(); }private void labelMinimize_MouseEnter(object sender, EventArgs e) { this.Cursor = Cursors.Hand; }private void labelMinimize_MouseLeave(object sender, EventArgs e) { this.Cursor = Cursors.Default; }private void labelClose_MouseEnter(object sender, EventArgs e) { this.Cursor = Cursors.Hand; }private void labelClose_MouseLeave(object sender, EventArgs e) { this.Cursor = Cursors.Default; }
5.Panel背景色设置为逐级变淡
给Pannel添加Paint事件。
private void panel1_Paint(object sender, PaintEventArgs e) { int y, dy; y = this.panel1.ClientRectangle.Location.Y; dy = this.panel1.ClientRectangle.Height / 90; for (int i = 0; i <= 89;i++ ) { Color c = new Color(); //调用Color对象的FromArgb方法 c = Color.FromArgb(50, i + 50, i + 120);//0,102,171 SolidBrush sb = new SolidBrush(c); Pen p = new Pen(sb, 1); //绘制矩形 e.Graphics.DrawRectangle(p, this.panel1.ClientRectangle.X, y, this.Width, y + dy); y = y + dy; //i++; } }
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