Csharp/CSharp Tutorial/GUI Windows Forms/Control
Содержание
- 1 Control Size and Location
- 2 Control Size and Location - Dynamic
- 3 Control: TabIndex, Size and Location
- 4 Control Tag Property
- 5 Create User Control based on Control class
- 6 Get controls on a form and verify its type
- 7 Override the DefaultSize property to gain better performance
- 8 Render onto the button
- 9 Set Caption(title) of the form
- 10 Set form forground color
Control Size and Location
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class ControlSizeLocation : Form {
private Button btnShow;
private Button btnChange;
private Label lbl;
public ControlSizeLocation()
{
BackColor = Color.LightBlue;
ForeColor = Color.DarkBlue;
Size = new Size(350,200);
btnShow = new Button();
btnShow.Location = new Point(50,50);
btnShow.Size = new Size(100,23);
btnShow.Text = "Show";
btnShow.Click += new System.EventHandler(btnShow_Click);
btnShow.Parent = this;
btnChange = new Button();
btnChange.Location = new Point(200,50);
btnChange.Size = new Size(100,23);
btnChange.Text = "Change";
btnChange.Click += new System.EventHandler(btnChange_Click);
btnChange.Parent = this;
lbl = new Label();
lbl.Text = "Control Size and Location";
lbl.Size = new Size(400,25);
lbl.Parent = this;
}
static void Main()
{
Application.Run(new ControlSizeLocation());
}
private void btnShow_Click(object sender, EventArgs e)
{
Console.WriteLine("Button Bottom:" + btnShow.Bottom.ToString());
Console.WriteLine("Button Top:" + btnShow.Top.ToString() );
Console.WriteLine("Button Left:" + btnShow.Left.ToString() );
Console.WriteLine("Button Right:" + btnShow.Right.ToString() );
Console.WriteLine("Button Location:" + btnShow.Location.ToString() );
Console.WriteLine("Button Width:" + btnShow.Width.ToString() );
Console.WriteLine("Button Height:" + btnShow.Height.ToString() );
Console.WriteLine("Button Size:" + btnShow.Size.ToString() );
Console.WriteLine("Button ClientSize:" + btnShow.ClientSize.ToString() );
Console.WriteLine("Form Size:" + this.Size.ToString() );
Console.WriteLine("Form ClientSize:" + this.ClientSize.ToString());
}
private void btnChange_Click(object sender, EventArgs e)
{
this.Size = new Size(800,200);
}
}</source>
Control Size and Location - Dynamic
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class ControlDynamicSizeLocation : Form {
private Button btnShow = new Button();
private Label lbl = new Label();
int xButtonSize, yButtonSize;
public ControlDynamicSizeLocation()
{
btnShow.Parent = this;
btnShow.Text = "Show Button Properties";
Size = new Size(400,400);
xButtonSize = (int)(Font.Height * .75) * btnShow.Text.Length;
yButtonSize = Font.Height * 2;
btnShow.Size = new Size(xButtonSize, yButtonSize);
btnShow.Click += new System.EventHandler(btnShow_Click);
lbl.Text = "Control Size and Location - Dynamic";
lbl.AutoSize = true;
lbl.Parent = this;
OnResize(EventArgs.Empty);
}
protected override void OnResize(EventArgs e)
{
base.OnResize(e);
int xPosition = (int)(this.ClientSize.Width / 2) - (int)(xButtonSize / 2);
int yPosition = (int)(this.ClientSize.Height / 2) - (int)(yButtonSize / 2);
btnShow.Location = new Point(xPosition, yPosition);
}
static void Main()
{
Application.Run(new ControlDynamicSizeLocation());
}
private void btnShow_Click(object sender, EventArgs e)
{
Console.WriteLine("Button Bottom:" + btnShow.Bottom.ToString());
Console.WriteLine("Button Top:" + btnShow.Top.ToString() );
Console.WriteLine("Button Left:" + btnShow.Left.ToString() );
Console.WriteLine("Button Right:" + btnShow.Right.ToString() );
Console.WriteLine("Button Location:" + btnShow.Location.ToString() );
Console.WriteLine("Button Width:" + btnShow.Width.ToString() );
Console.WriteLine("Button Height:" + btnShow.Height.ToString() );
Console.WriteLine("Button Size:" + btnShow.Size.ToString() );
Console.WriteLine("Button ClientSize:" + btnShow.ClientSize.ToString() );
Console.WriteLine("Font:" + btnShow.Font.ToString());
}
}</source>
Control: TabIndex, Size and Location
<source lang="csharp">using System; using System.Windows.Forms; using System.Drawing; public class NotePadWindowsForms : System.Windows.Forms.Form {
private System.Windows.Forms.Button button1;
public NotePadWindowsForms()
{
button1 = new System.Windows.Forms.Button();
button1.Location = new System.Drawing.Point(8, 32);
button1.Name = "button1";
button1.Size = new System.Drawing.Size(104, 32);
button1.TabIndex = 0;
button1.Text = "Click Me";
// Adding controls to the fomr
Controls.AddRange(new System.Windows.Forms.Control[]{ button1} );
button1.Click += new System.EventHandler(button1_Click);
}
private void button1_Click(object sender, System.EventArgs e)
{
MessageBox.Show("Button is clicked");
}
public static int Main()
{
Application.Run(new NotePadWindowsForms());
return 0;
}
}</source>
Control Tag Property
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class Tags : Form {
Label lbl;
public Tags()
{
Size = new Size(300,200);
lbl = new Label();
lbl.Text = "Label";
lbl.AutoSize = true;
lbl.Parent = this;
lbl.Location = new Point(0,0);
FontStyle theEnum = new FontStyle();
FontStyle[] theStyles = (FontStyle[])Enum.GetValues(theEnum.GetType());
int i = 1;
foreach (FontStyle style in theStyles)
{
Button btn = new Button();
btn.Parent = this;
btn.Location = new Point(25,25 * i++);
btn.Size = new Size(75,20);
btn.Text = style.ToString();
btn.Tag = style;
btn.Click += new System.EventHandler(btn_Click);
}
}
static void Main()
{
Application.Run(new Tags());
}
private void btn_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
FontStyle fs = (FontStyle)btn.Tag;
lbl.Font = new Font(lbl.Font, fs);
}
}</source>
Create User Control based on Control class
<source lang="csharp">using System; using System.Drawing; using System.Drawing.Imaging; using System.Drawing.Drawing2D; using System.Windows.Forms; public class SpriteTest : Form {
public SpriteTest()
{
this.SuspendLayout();
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(295, 270);
this.Text = "Sprite Test";
this.Load += new System.EventHandler(this.SpriteTest_Load);
this.ResumeLayout(false);
}
private bool isDraggingA = false;
private bool isDraggingB = false;
private EllipseShape ellipseA, ellipseB;
private void SpriteTest_Load(object sender, EventArgs e)
{
ellipseA = new EllipseShape();
ellipseA.Width = ellipseA.Height = 100;
ellipseA.Top = ellipseA.Left = 30;
ellipseA.BackColor = Color.Red;
this.Controls.Add(ellipseA);
ellipseB = new EllipseShape();
ellipseB.Width = ellipseB.Height = 100;
ellipseB.Top = ellipseB.Left = 130;
ellipseB.BackColor = Color.Azure;
this.Controls.Add(ellipseB);
ellipseA.MouseDown += new MouseEventHandler(Ellipse_MouseDown);
ellipseA.MouseUp += new MouseEventHandler(Ellipse_MouseUp);
ellipseA.MouseMove += new MouseEventHandler(Ellipse_MouseMove);
ellipseB.MouseDown += new MouseEventHandler(Ellipse_MouseDown);
ellipseB.MouseUp += new MouseEventHandler(Ellipse_MouseUp);
ellipseB.MouseMove += new MouseEventHandler(Ellipse_MouseMove);
}
private void Ellipse_MouseDown(object sender, MouseEventArgs e)
{
Control control = (Control)sender;
if (e.Button == MouseButtons.Left)
{
control.Tag = new Point(e.X, e.Y);
if (control == ellipseA)
{
isDraggingA = true;
}
else
{
isDraggingB = true;
}
}
}
private void Ellipse_MouseUp(object sender, MouseEventArgs e)
{
isDraggingA = false;
isDraggingB = false;
}
private void Ellipse_MouseMove(object sender, MouseEventArgs e)
{
Control control = (Control)sender;
if ((isDraggingA && control == ellipseA) || (isDraggingB && control == ellipseB))
{
Point point = (Point)control.Tag;
control.Left = e.X + control.Left - point.X;
control.Top = e.Y + control.Top - point.Y;
}
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new SpriteTest());
}
} class EllipseShape : Control {
public EllipseShape(){}
private GraphicsPath path = null;
private void RefreshPath()
{
path = new GraphicsPath();
path.AddEllipse(this.ClientRectangle);
this.Region = new Region(path);
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (path != null)
{
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
e.Graphics.FillPath(new SolidBrush(this.BackColor), path);
e.Graphics.DrawPath(new Pen(this.ForeColor, 1), path);
}
}
protected override void OnResize(System.EventArgs e)
{
base.OnResize(e);
RefreshPath();
this.Invalidate();
}
}</source>
Get controls on a form and verify its type
<source lang="csharp">using System; using System.Windows.Forms; public class GetControlOnFormDemo {
[STAThread]
public static void Main(string[] args)
{
Application.Run(new GetControlsOnForm());
}
} public partial class GetControlsOnForm : Form {
public GetControlsOnForm()
{
InitializeComponent();
}
private void cmdProcessAll_Click(object sender, System.EventArgs e)
{
ProcessControls(this);
}
private void ProcessControls(Control ctrl)
{
// Ignore the control unless it"s a textbox.
if (ctrl.GetType() == typeof(TextBox))
{
ctrl.Text = "";
}
foreach (Control ctrlChild in ctrl.Controls)
{
ProcessControls(ctrlChild);
}
}
} partial class GetControlsOnForm {
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.TextBox textBox4;
private System.Windows.Forms.Button cmdProcessAll;
private System.ruponentModel.IContainer components = null;
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
private void InitializeComponent()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.textBox4 = new System.Windows.Forms.TextBox();
this.cmdProcessAll = new System.Windows.Forms.Button();
this.SuspendLayout();
this.textBox1.Location = new System.Drawing.Point(16, 16);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(252, 20);
this.textBox1.TabIndex = 0;
this.textBox1.Text = "textBox1";
this.textBox2.Location = new System.Drawing.Point(16, 48);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(252, 20);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "textBox2";
this.textBox3.Location = new System.Drawing.Point(16, 80);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(252, 20);
this.textBox3.TabIndex = 2;
this.textBox3.Text = "textBox3";
this.textBox4.Location = new System.Drawing.Point(16, 112);
this.textBox4.Name = "textBox4";
this.textBox4.Size = new System.Drawing.Size(252, 20);
this.textBox4.TabIndex = 3;
this.textBox4.Text = "textBox4";
this.cmdProcessAll.Location = new System.Drawing.Point(20, 220);
this.cmdProcessAll.Name = "cmdProcessAll";
this.cmdProcessAll.Size = new System.Drawing.Size(116, 28);
this.cmdProcessAll.TabIndex = 4;
this.cmdProcessAll.Text = "Process Text Boxes";
this.cmdProcessAll.Click += new System.EventHandler(this.cmdProcessAll_Click);
this.ruponents = new System.ruponentModel.Container();
this.Controls.AddRange(new System.Windows.Forms.Control[] { this.cmdProcessAll,
this.textBox4,
this.textBox3,
this.textBox2,
this.textBox1});
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Text = "GetControlsOnForm";
}
}</source>
Override the DefaultSize property to gain better performance
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class FormWithDefaultSize : Form {
private Button btnShow;
private Button btnChange;
private Label lbl;
protected override Size DefaultSize
{
get
{
return new Size(400,400);
}
}
public FormWithDefaultSize()
{
BackColor = Color.LightBlue;
ForeColor = Color.DarkBlue;
btnShow = new Button();
btnShow.Location = new Point(50,50);
btnShow.Size = new Size(100,23);
btnShow.Text = "Show";
btnShow.Click += new System.EventHandler(btnShow_Click);
btnShow.Parent = this;
btnChange = new Button();
btnChange.Location = new Point(200,50);
btnChange.Size = new Size(100,23);
btnChange.Text = "Change";
btnChange.Click += new System.EventHandler(btnChange_Click);
btnChange.Parent = this;
lbl = new Label();
lbl.Text = "Control Size and Location";
lbl.Size = new Size(400,25);
lbl.Parent = this;
}
static void Main()
{
Application.Run(new FormWithDefaultSize());
}
private void btnShow_Click(object sender, EventArgs e)
{
Console.WriteLine("Button Bottom:" + btnShow.Bottom.ToString());
Console.WriteLine("Button Top:" + btnShow.Top.ToString() );
Console.WriteLine("Button Left:" + btnShow.Left.ToString() );
Console.WriteLine("Button Right:" + btnShow.Right.ToString() );
Console.WriteLine("Button Location:" + btnShow.Location.ToString() );
Console.WriteLine("Button Width:" + btnShow.Width.ToString() );
Console.WriteLine("Button Height:" + btnShow.Height.ToString() );
Console.WriteLine("Button Size:" + btnShow.Size.ToString() );
Console.WriteLine("Button ClientSize:" + btnShow.ClientSize.ToString() );
Console.WriteLine("Form Size:" + this.Size.ToString() );
Console.WriteLine("Form ClientSize:" + this.ClientSize.ToString());
}
private void btnChange_Click(object sender, EventArgs e)
{
this.Size = new Size(800,200);
}
}</source>
Render onto the button
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; using System.Drawing.Drawing2D; public class ButtonRenerer : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
private System.Windows.Forms.Button btnRenderedButton;
private System.Windows.Forms.Button btnRenderToOtherButton;
public ButtonRenerer()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.btnRenderedButton = new System.Windows.Forms.Button();
this.btnRenderToOtherButton = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// btnRenderedButton
//
this.btnRenderedButton.Location = new System.Drawing.Point(168, 120);
this.btnRenderedButton.Name = "btnRenderedButton";
this.btnRenderedButton.Size = new System.Drawing.Size(112, 136);
this.btnRenderedButton.TabIndex = 0;
this.btnRenderedButton.Text = "Click on other button!";
//
// btnRenderToOtherButton
//
this.btnRenderToOtherButton.Location = new System.Drawing.Point(168, 8);
this.btnRenderToOtherButton.Name = "btnRenderToOtherButton";
this.btnRenderToOtherButton.Size = new System.Drawing.Size(112, 56);
this.btnRenderToOtherButton.TabIndex = 1;
this.btnRenderToOtherButton.Text = "Render to button";
//
// ButtonRenerer
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.btnRenderToOtherButton);
this.Controls.Add(this.btnRenderedButton);
this.Name = "ButtonRenerer";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "Basic Paint Form";
this.Paint += new System.Windows.Forms.PaintEventHandler(this.ButtonRenerer_Paint);
this.ResumeLayout(false);
}
[STAThread]
static void Main()
{
Application.Run(new ButtonRenerer());
}
private void ButtonRenerer_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
Graphics buttonGraphics = Graphics.FromHwnd(btnRenderedButton.Handle);
HatchBrush b = new HatchBrush(HatchStyle.Cross, Color.Purple, Color.Gold);
buttonGraphics.FillRectangle(b, 0, 0, 50, btnRenderedButton.Height);
}
}</source>
Set Caption(title) of the form
<source lang="csharp">using System; using System.Windows.Forms; using System.Drawing; public class FormTitleSetting : System.Windows.Forms.Form {
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
public FormTitleSetting()
{
Text = "Test WinForm";
ForeColor = System.Drawing.Color.Yellow;
button1 = new System.Windows.Forms.Button();
textBox1 = new System.Windows.Forms.TextBox();
// button control and its properties
button1.Location = new System.Drawing.Point(8, 32);
button1.Name = "button1";
button1.Size = new System.Drawing.Size(104, 32);
button1.TabIndex = 0;
button1.Text = "Click Me";
// text box control and its properties
textBox1.Location = new System.Drawing.Point(24, 104);
textBox1.Name = "textBox1";
textBox1.Size = new System.Drawing.Size(184, 20);
textBox1.TabIndex = 1;
textBox1.Text = "textBox1";
// Adding controls to the fomr
Controls.AddRange(new System.Windows.Forms.Control[]{textBox1, button1} );
button1.Click += new System.EventHandler(button1_Click);
}
private void button1_Click(object sender,System.EventArgs e)
{
textBox1.Text = "Button is clicked";
MessageBox.Show("Button is clicked");
}
public static int Main()
{
Application.Run(new FormTitleSetting());
return 0;
}
}</source>
Set form forground color
<source lang="csharp">using System; using System.Windows.Forms; using System.Drawing; public class FormForegroundColorSetting : System.Windows.Forms.Form {
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
public FormForegroundColorSetting()
{
Text = "Test WinForm";
ForeColor = System.Drawing.Color.Yellow;
button1 = new System.Windows.Forms.Button();
textBox1 = new System.Windows.Forms.TextBox();
// button control and its properties
button1.Location = new System.Drawing.Point(8, 32);
button1.Name = "button1";
button1.Size = new System.Drawing.Size(104, 32);
button1.TabIndex = 0;
button1.Text = "Click Me";
// text box control and its properties
textBox1.Location = new System.Drawing.Point(24, 104);
textBox1.Name = "textBox1";
textBox1.Size = new System.Drawing.Size(184, 20);
textBox1.TabIndex = 1;
textBox1.Text = "textBox1";
// Adding controls to the fomr
Controls.AddRange(new System.Windows.Forms.Control[]{textBox1, button1} );
button1.Click += new System.EventHandler(button1_Click);
}
private void button1_Click(object sender,System.EventArgs e)
{
textBox1.Text = "Button is clicked";
MessageBox.Show("Button is clicked");
}
public static int Main()
{
Application.Run(new FormForegroundColorSetting());
return 0;
}
}</source>
