Form size changed event handler : Form Event « GUI Windows Forms « C# / CSharp Tutorial






Form size changed event handler
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());
  }
}








23.3.Form Event
23.3.1.Form size changed event handlerForm size changed event handler
23.3.2.All form eventsAll form events
23.3.3.React to form resize eventReact to form resize event
23.3.4.Paint eventPaint event
23.3.5.Paint two forms with one paint event handler
23.3.6.Paint one forms with two paint event handler
23.3.7.Form Mouse Up event
23.3.8.Form mouse move event
23.3.9.Form Key event
23.3.10.Form life time event: Closing, Load, Closed, Activated, Deactivate
23.3.11.Cancel Form Closing event
23.3.12.Form Paint eventForm Paint event