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LayoutEventHandler デリゲート
.NET Framework 4.5
名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (System.Windows.Forms.dll 内)
パラメーター
- sender
- 型 : System.Object
イベントのソース。
- e
- 型 : System.Windows.Forms.LayoutEventArgs
イベント データを格納している LayoutEventArgs。
public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Button layoutButton; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); } protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } private void InitializeComponent() { this.layoutButton = new System.Windows.Forms.Button(); this.textBox1 = new System.Windows.Forms.TextBox(); this.label1 = new System.Windows.Forms.Label(); this.SuspendLayout(); // // layoutButton // this.layoutButton.Anchor = System.Windows.Forms.AnchorStyles.Bottom; this.layoutButton.Location = new System.Drawing.Point(72, 88); this.layoutButton.Name = "layoutButton"; this.layoutButton.Size = new System.Drawing.Size(150, 23); this.layoutButton.TabIndex = 0; this.layoutButton.Text = "Hello"; // // textBox1 // this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right); this.textBox1.Location = new System.Drawing.Point(24, 40); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(248, 20); this.textBox1.TabIndex = 1; this.textBox1.Text = "Hello"; this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged); // // label1 // this.label1.Location = new System.Drawing.Point(24, 16); this.label1.Name = "label1"; this.label1.TabIndex = 2; this.label1.Text = "Button\'s Text:"; // // Form1 // this.ClientSize = new System.Drawing.Size(292, 129); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.label1, this.textBox1, this.layoutButton}); this.Name = "Form1"; this.Text = "Layout Sample"; this.Layout += new System.Windows.Forms.LayoutEventHandler(this.Form1_Layout); this.ResumeLayout(false); } [STAThread] static void Main() { Application.Run(new Form1()); } // This method ensures that the form's width is the preferred size of 300 pixels // or the size of the button plus 50 pixels, whichever amount is less. private void Form1_Layout(object sender, System.Windows.Forms.LayoutEventArgs e) { // This event is raised once at startup with the AffectedControl // and AffectedProperty properties on the LayoutEventArgs as null. // The event provides size preferences for that case. if ((e.AffectedControl != null) && (e.AffectedProperty != null)) { // Ensure that the affected property is the Bounds property // of the form. if (e.AffectedProperty.ToString() == "Bounds") { // If layoutButton's width plus a padding of 50 pixels is greater than the preferred // size of 300 pixels, increase the form's width. if ((this.layoutButton.Width + 50) > 300) { this.Width = this.layoutButton.Width + 50; } // If not, keep the form's width at 300 pixels. else { this.Width = 300; } // Center layoutButton on the form. this.layoutButton.Left = (this.ClientSize.Width - this.layoutButton.Width) / 2; } } } // This method sets the Text property of layoutButton to the Text property // of textBox1. If the new text plus a padding of 20 pixels is larger than // the preferred size of 150 pixels, increase layoutButton's Width property. private void textBox1_TextChanged(object sender, System.EventArgs e) { // Set the Text property of layoutButton. this.layoutButton.Text = this.textBox1.Text; // Get the width of the text using the proper font. int textWidth = (int)this.CreateGraphics().MeasureString(layoutButton.Text, layoutButton.Font).Width; // If the width of the text plus a padding of 20 pixels is greater than the preferred size of // 150 pixels, increase layoutButton's width. if ((textWidth + 20) > 150) { // Setting the size property on any control raises // the Layout event for its container. this.layoutButton.Width = textWidth + 20; } // If not, keep layoutButton's width at 150 pixels. else { this.layoutButton.Width = 150; } } }
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