Csharp/C Sharp/GUI Windows Form/ScrollBar
Содержание
ScrollBars Demo
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
namespace ScrollBars
{
/// <summary>
/// Summary description for ScrollBars.
/// </summary>
public class ScrollBars : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.VScrollBar vScrollBar1;
/// <summary>
/// Required designer variable.
/// </summary>
int counter=0;
private System.Windows.Forms.Label label1;
private System.ruponentModel.Container components = null;
public ScrollBars()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form 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()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.vScrollBar1 = new System.Windows.Forms.VScrollBar();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// textBox1
//
this.textBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.textBox1.ForeColor = System.Drawing.Color.Transparent;
this.textBox1.Location = new System.Drawing.Point(24, 56);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.ReadOnly = true;
this.textBox1.Size = new System.Drawing.Size(144, 32);
this.textBox1.TabIndex = 4;
this.textBox1.Text = "";
this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
//
// vScrollBar1
//
this.vScrollBar1.Location = new System.Drawing.Point(168, 56);
this.vScrollBar1.Name = "vScrollBar1";
this.vScrollBar1.Size = new System.Drawing.Size(16, 32);
this.vScrollBar1.TabIndex = 7;
this.vScrollBar1.Scroll += new System.Windows.Forms.ScrollEventHandler(this.vScrollBar1_Scroll);
//
// label1
//
this.label1.Location = new System.Drawing.Point(8, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(192, 16);
this.label1.TabIndex = 6;
this.label1.Text = "Numeric Scolling using VScroll Bars";
//
// ScrollBars
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(208, 109);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1,
this.vScrollBar1,
this.textBox1});
this.Name = "ScrollBars";
this.Text = "Numeric Scroll";
this.Load += new System.EventHandler(this.ScrollBars_Load);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new ScrollBars());
}
private void textBox1_TextChanged(object sender, System.EventArgs e)
{
}
private void ScrollBars_Load(object sender, System.EventArgs e)
{
// Set the maximum range for the scrollbar
vScrollBar1.Maximum = 100;
// Set the minimum range for the scrollbar
vScrollBar1.Minimum = 0 ;
// Set the SmallChange factor
vScrollBar1.SmallChange = 1;
}
private void vScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
{
// Check if the increment is Small
if ( e.Type == ScrollEventType.Last )
counter = 100 ;
else
// Check if the scroll is moved to minimum pos
if ( e.Type == ScrollEventType.First)
counter = 0 ;
else
// Check if the scroll is moved small distance
if ( e.Type == ScrollEventType.SmallDecrement )
counter -- ;
else
// Check if the scroll is moved small distance
if ( e.Type == ScrollEventType.SmallIncrement )
{
counter++;
MessageBox.Show("Small increment");
}
else
// Check if the scroll is moved large distance
if ( e.Type == ScrollEventType.LargeDecrement )
counter-=5;
else
// Check if the scroll is moved large distance
if ( e.Type == ScrollEventType.LargeIncrement )
{
MessageBox.Show("Large increment");
counter+=5;
}
else
// Check if the scroll is moved to the Min position
if ( e.Type == ScrollEventType.First )
counter = 0 ;
else
// Check if the scroll to the Max position
if ( e.Type == ScrollEventType.Last)
counter = 100 ;
Console.WriteLine(e.NewValue+"\n");
// Check if the scroll is moved large distance
if ( counter > 100 ) counter = 100 ;
if ( counter < 0 ) counter = 0 ;
textBox1.Text = counter.ToString() ;
}
}
}
Scroll event
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form {
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.VScrollBar vScrollBar1;
int counter = 0;
private System.Windows.Forms.Label label1;
public Form1() {
this.textBox1 = new System.Windows.Forms.TextBox();
this.vScrollBar1 = new System.Windows.Forms.VScrollBar();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
this.textBox1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.textBox1.ForeColor = System.Drawing.Color.Transparent;
this.textBox1.Location = new System.Drawing.Point(24, 56);
this.textBox1.Multiline = true;
this.textBox1.ReadOnly = true;
this.textBox1.Size = new System.Drawing.Size(144, 32);
this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
this.vScrollBar1.Location = new System.Drawing.Point(168, 56);
this.vScrollBar1.Size = new System.Drawing.Size(16, 32);
this.vScrollBar1.Scroll += new System.Windows.Forms.ScrollEventHandler(this.vScrollBar1_Scroll);
this.label1.Location = new System.Drawing.Point(8, 16);
this.label1.Size = new System.Drawing.Size(192, 16);
this.label1.Text = "Numeric Scolling using VScroll Bars";
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(208, 109);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1,
this.vScrollBar1,
this.textBox1});
this.Text = "Numeric Scroll";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
}
[STAThread]
static void Main() {
Application.Run(new Form1());
}
private void textBox1_TextChanged(object sender, System.EventArgs e) {
}
private void Form1_Load(object sender, System.EventArgs e) {
vScrollBar1.Maximum = 100;
vScrollBar1.Minimum = 0;
vScrollBar1.SmallChange = 1;
}
private void vScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
if (e.Type == ScrollEventType.Last)
counter = 100;
if (e.Type == ScrollEventType.First)
counter = 0;
if (e.Type == ScrollEventType.SmallDecrement)
counter--;
if (e.Type == ScrollEventType.SmallIncrement) {
counter++;
}
if (e.Type == ScrollEventType.LargeDecrement)
counter -= 5;
if (e.Type == ScrollEventType.LargeIncrement) {
counter += 5;
}
if (e.Type == ScrollEventType.First)
counter = 0;
if (e.Type == ScrollEventType.Last)
counter = 100;
Console.WriteLine(e.NewValue + "\n");
if (counter > 100) counter = 100;
if (counter < 0) counter = 0;
Console.WriteLine(counter.ToString());
}
}
Use ScrollBar to control the picture size
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
public class Sizer : System.Windows.Forms.Form {
private System.Windows.Forms.PictureBox picCritter;
private System.Windows.Forms.HScrollBar scrSize;
public static void Main(){
Application.Run(new Sizer());
}
public Sizer() {
InitializeComponent();
}
private void InitializeComponent() {
this.picCritter = new System.Windows.Forms.PictureBox();
this.scrSize = new System.Windows.Forms.HScrollBar();
this.SuspendLayout();
this.picCritter.BackColor = System.Drawing.Color.White;
this.picCritter.Image = new Bitmap("winter.jpg");
this.picCritter.Location = new System.Drawing.Point(8, 8);
this.picCritter.Name = "picCritter";
this.picCritter.Size = new System.Drawing.Size(40, 40);
this.picCritter.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
this.picCritter.TabIndex = 0;
this.picCritter.TabStop = false;
this.scrSize.Location = new System.Drawing.Point(16, 248);
this.scrSize.Maximum = 200;
this.scrSize.Minimum = 50;
this.scrSize.Name = "scrSize";
this.scrSize.Size = new System.Drawing.Size(256, 16);
this.scrSize.TabIndex = 1;
this.scrSize.Value = 50;
this.scrSize.Scroll += new System.Windows.Forms.ScrollEventHandler(this.scrSize_Scroll);
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.scrSize,
this.picCritter});
this.Name = "Sizer";
this.Text = "Sizer";
this.ResumeLayout(false);
}
private void scrSize_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
picCritter.Size = new Size(scrSize.Value, scrSize.Value);
}
}
VScrollBar ValueChanged
using System;
using System.Drawing;
using System.Windows.Forms;
class ColorScroll: Form
{
Panel panel;
Label[] alabelName = new Label[3];
Label[] alabelValue = new Label[3];
VScrollBar[] avscroll = new VScrollBar[3];
public static void Main()
{
Application.Run(new ColorScroll());
}
public ColorScroll()
{
Color[] acolor = { Color.Red, Color.Green, Color.Blue };
panel = new Panel();
panel.Parent = this;
panel.Location = new Point(0, 0);
panel.BackColor = Color.White;
for (int i = 0; i < 3; i++)
{
alabelName[i] = new Label();
alabelName[i].Parent = panel;
alabelName[i].ForeColor = acolor[i];
alabelName[i].Text = "&" + acolor[i].ToKnownColor();
alabelName[i].TextAlign = ContentAlignment.MiddleCenter;
avscroll[i] = new VScrollBar();
avscroll[i].Parent = panel;
avscroll[i].SmallChange = 1;
avscroll[i].LargeChange = 16;
avscroll[i].Minimum = 0;
avscroll[i].Maximum = 255 + avscroll[i].LargeChange - 1;
avscroll[i].ValueChanged += new EventHandler(ScrollOnValueChanged);
avscroll[i].TabStop = true;
alabelValue[i] = new Label();
alabelValue[i].Parent = panel;
alabelValue[i].TextAlign = ContentAlignment.MiddleCenter;
}
Color color = BackColor;
avscroll[0].Value = color.R; // Generates ValueChanged event
avscroll[1].Value = color.G;
avscroll[2].Value = color.B;
OnResize(EventArgs.Empty);
}
protected override void OnResize(EventArgs ea)
{
base.OnResize(ea);
int cx = ClientSize.Width;
int cy = ClientSize.Height;
int cyFont = Font.Height;
panel.Size = new Size(cx / 2, cy);
for (int i = 0; i < 3; i++)
{
alabelName[i].Location = new Point(i * cx / 6, cyFont / 2);
alabelName[i].Size = new Size(cx / 6, cyFont);
avscroll[i].Location = new Point((4 * i + 1) * cx / 24,
2 * cyFont);
avscroll[i].Size = new Size(cx / 12, cy - 4 * cyFont);
alabelValue[i].Location = new Point(i * cx / 6,
cy - 3 * cyFont / 2);
alabelValue[i].Size = new Size(cx / 6, cyFont);
}
}
void ScrollOnValueChanged(Object obj, EventArgs ea)
{
for (int i = 0; i < 3; i++)
if((VScrollBar) obj == avscroll[i])
alabelValue[i].Text = avscroll[i].Value.ToString();
BackColor = Color.FromArgb(avscroll[0].Value,
avscroll[1].Value,
avscroll[2].Value);
}
}