Csharp/CSharp Tutorial/GUI Windows Forms/TrackBar
Содержание
Color Tracker
<source lang="csharp">using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; public class TrackColorForm : System.Windows.Forms.Form {
private System.ruponentModel.Container components = null;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TrackBar blueTrackBar;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TrackBar greenTrackBar;
private System.Windows.Forms.TrackBar redTrackBar;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Panel panel1;
private System.Windows.Forms.Label lblCurrColor;
private System.Windows.Forms.PictureBox colorBox;
public TrackColorForm()
{
InitializeComponent();
redTrackBar.Value = 100;
greenTrackBar.Value = 255;
blueTrackBar.Value = 0;
UpdateColor();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.label4 = new System.Windows.Forms.Label();
this.label1 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.panel1 = new System.Windows.Forms.Panel();
this.blueTrackBar = new System.Windows.Forms.TrackBar();
this.greenTrackBar = new System.Windows.Forms.TrackBar();
this.redTrackBar = new System.Windows.Forms.TrackBar();
this.colorBox = new System.Windows.Forms.PictureBox();
this.lblCurrColor = new System.Windows.Forms.Label();
this.panel1.SuspendLayout();
((System.ruponentModel.ISupportInitialize)(this.blueTrackBar)).BeginInit();
((System.ruponentModel.ISupportInitialize)(this.greenTrackBar)).BeginInit();
((System.ruponentModel.ISupportInitialize)(this.redTrackBar)).BeginInit();
this.SuspendLayout();
//
// label4
//
this.label4.Font = new System.Drawing.Font("Microsoft Sans Serif", 15F);
this.label4.Location = new System.Drawing.Point(16, 88);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(240, 32);
this.label4.TabIndex = 9;
this.label4.Text = "Pick your slider here:";
//
// label1
//
this.label1.Font = new System.Drawing.Font("Arial", 15F);
this.label1.Location = new System.Drawing.Point(24, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(88, 32);
this.label1.TabIndex = 4;
this.label1.Text = "Red:";
//
// label3
//
this.label3.Font = new System.Drawing.Font("Arial", 15F);
this.label3.Location = new System.Drawing.Point(24, 104);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(88, 32);
this.label3.TabIndex = 6;
this.label3.Text = "Blue:";
//
// label2
//
this.label2.Font = new System.Drawing.Font("Arial", 15F);
this.label2.Location = new System.Drawing.Point(24, 64);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(88, 32);
this.label2.TabIndex = 5;
this.label2.Text = "Green:";
//
// panel1
//
this.panel1.AutoScroll = true;
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.panel1.Controls.Add(this.label2);
this.panel1.Controls.Add(this.blueTrackBar);
this.panel1.Controls.Add(this.label3);
this.panel1.Controls.Add(this.greenTrackBar);
this.panel1.Controls.Add(this.redTrackBar);
this.panel1.Controls.Add(this.label1);
this.panel1.Location = new System.Drawing.Point(16, 120);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(384, 88);
this.panel1.TabIndex = 8;
//
// blueTrackBar
//
this.blueTrackBar.Location = new System.Drawing.Point(120, 96);
this.blueTrackBar.Maximum = 255;
this.blueTrackBar.Name = "blueTrackBar";
this.blueTrackBar.Size = new System.Drawing.Size(240, 45);
this.blueTrackBar.TabIndex = 1;
this.blueTrackBar.TickFrequency = 5;
this.blueTrackBar.TickStyle = System.Windows.Forms.TickStyle.TopLeft;
this.blueTrackBar.Scroll += new System.EventHandler(this.blueTrackBar_Scroll);
//
// greenTrackBar
//
this.greenTrackBar.Location = new System.Drawing.Point(120, 56);
this.greenTrackBar.Maximum = 255;
this.greenTrackBar.Name = "greenTrackBar";
this.greenTrackBar.Size = new System.Drawing.Size(240, 45);
this.greenTrackBar.TabIndex = 3;
this.greenTrackBar.TickFrequency = 5;
this.greenTrackBar.TickStyle = System.Windows.Forms.TickStyle.TopLeft;
this.greenTrackBar.Scroll += new System.EventHandler(this.greenTrackBar_Scroll);
//
// redTrackBar
//
this.redTrackBar.Location = new System.Drawing.Point(120, 16);
this.redTrackBar.Maximum = 255;
this.redTrackBar.Name = "redTrackBar";
this.redTrackBar.Size = new System.Drawing.Size(232, 45);
this.redTrackBar.TabIndex = 2;
this.redTrackBar.TickFrequency = 5;
this.redTrackBar.TickStyle = System.Windows.Forms.TickStyle.TopLeft;
this.redTrackBar.Scroll += new System.EventHandler(this.redTrackBar_Scroll);
//
// colorBox
//
this.colorBox.BackColor = System.Drawing.Color.Blue;
this.colorBox.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
this.colorBox.Location = new System.Drawing.Point(16, 16);
this.colorBox.Name = "colorBox";
this.colorBox.Size = new System.Drawing.Size(384, 56);
this.colorBox.TabIndex = 0;
this.colorBox.TabStop = false;
//
// lblCurrColor
//
this.lblCurrColor.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.lblCurrColor.Font = new System.Drawing.Font("Microsoft Sans Serif", 14F);
this.lblCurrColor.Location = new System.Drawing.Point(16, 224);
this.lblCurrColor.Name = "lblCurrColor";
this.lblCurrColor.Size = new System.Drawing.Size(392, 40);
this.lblCurrColor.TabIndex = 7;
this.lblCurrColor.Text = "label4";
//
// TrackColorForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(424, 285);
this.Controls.Add(this.label4);
this.Controls.Add(this.panel1);
this.Controls.Add(this.lblCurrColor);
this.Controls.Add(this.colorBox);
this.panel1.ResumeLayout(false);
((System.ruponentModel.ISupportInitialize)(this.blueTrackBar)).EndInit();
((System.ruponentModel.ISupportInitialize)(this.greenTrackBar)).EndInit();
((System.ruponentModel.ISupportInitialize)(this.redTrackBar)).EndInit();
this.ResumeLayout(false);
}
[STAThread]
static void Main()
{
Application.Run(new TrackColorForm());
}
protected void greenTrackBar_Scroll (object sender, System.EventArgs e)
{
UpdateColor();
}
protected void redTrackBar_Scroll (object sender, System.EventArgs e)
{
UpdateColor();
}
protected void blueTrackBar_Scroll (object sender, System.EventArgs e)
{
UpdateColor();
}
private void UpdateColor()
{
Color c = Color.FromArgb(redTrackBar.Value, greenTrackBar.Value, blueTrackBar.Value);
colorBox.BackColor = c;
lblCurrColor.Text = string.Format("Current color is: ({0}, {1}, {2})", redTrackBar.Value, greenTrackBar.Value,blueTrackBar.Value);
}
}</source>
TrackBar on value changed event handler
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class TrackBars : Form {
Panel pnl;
PictureBox pb;
TrackBar htbar;
TrackBar vtbar;
public TrackBars()
{
Size = new Size(500,520);
Image img = Image.FromFile("YourFile.bmp");
pnl = new Panel();
pnl.Parent = this;
pnl.BorderStyle = BorderStyle.FixedSingle;
pnl.Size = new Size(400,400);
pnl.Location = new Point(10,10);
pb = new PictureBox();
pb.Parent = pnl;
pb.Size = new Size(200, 200);
pb.Location = new Point((pnl.Size.Width / 2) - (pb.Size.Width / 2),
(pnl.Size.Height / 2) - (pb.Size.Height /2));
pb.BorderStyle = BorderStyle.FixedSingle;
pb.SizeMode = PictureBoxSizeMode.StretchImage;
pb.Image = img;
htbar = new TrackBar();
htbar.Parent = this;
htbar.Orientation = Orientation.Horizontal;
htbar.Size = new Size(pnl.Width, 10);
htbar.Location = new Point(pnl.Left, pnl.Bottom + 25);
htbar.TickStyle = TickStyle.BottomRight;
htbar.TickFrequency = 25;
htbar.Minimum = 25;
htbar.Maximum = 400;
htbar.SmallChange = 10;
htbar.LargeChange = 25;
htbar.BackColor = Color.Yellow;
htbar.Value = pb.Width;
htbar.ValueChanged += new EventHandler(htbar_OnValueChanged);
vtbar = new TrackBar();
vtbar.Parent = this;
vtbar.Orientation = Orientation.Vertical;
vtbar.Size = new Size(25, pnl.Height);
vtbar.Location = new Point(pnl.Right + 25, pnl.Top);
vtbar.TickStyle = TickStyle.Both;
vtbar.SetRange(25,400);
vtbar.SmallChange = 10;
vtbar.LargeChange = 50;
vtbar.TickFrequency = vtbar.Maximum / 20;
vtbar.BackColor = Color.Pink;
vtbar.Value = pb.Height;
vtbar.ValueChanged += new EventHandler(vtbar_OnValueChanged);
}
private void htbar_OnValueChanged(object sender, EventArgs e)
{
pb.Size = new Size(htbar.Value, pb.Height);
}
private void vtbar_OnValueChanged(object sender, EventArgs e)
{
pb.Size = new Size(pb.Width, vtbar.Value);
}
static void Main()
{
Application.Run(new TrackBars());
}
}</source>
TrackBar: SmallChange, LargeChange, Minimum, Maximum
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms;
class ColorTrackBar: Form {
Panel panel;
Label[] alabelName = new Label[3];
Label[] alabelValue = new Label[3];
TrackBar[] atrackbar = new TrackBar[3];
public static void Main()
{
Application.Run(new ColorTrackBar());
}
public ColorTrackBar()
{
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;
atrackbar[i] = new TrackBar();
atrackbar[i].Parent = panel;
atrackbar[i].Orientation = Orientation.Vertical;
atrackbar[i].BackColor = acolor[i];
atrackbar[i].SmallChange = 1;
atrackbar[i].LargeChange = 16;
atrackbar[i].Minimum = 0;
atrackbar[i].Maximum = 255;
atrackbar[i].TickFrequency = 16;
atrackbar[i].ValueChanged += new EventHandler(TrackBarOnValueChanged);
alabelValue[i] = new Label();
alabelValue[i].Parent = panel;
alabelValue[i].TextAlign = ContentAlignment.MiddleCenter;
}
Color color = BackColor;
atrackbar[0].Value = color.R; // Generates ValueChanged event
atrackbar[1].Value = color.G;
atrackbar[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);
atrackbar[i].Height = cy - 4 * cyFont;
atrackbar[i].Location =
new Point((1 + 2 * i) * cx / 12 - atrackbar[i].Width / 2,
2 * cyFont);
alabelValue[i].Location = new Point(i * cx / 6,
cy - 3 * cyFont / 2);
alabelValue[i].Size = new Size(cx / 6, cyFont);
}
}
void TrackBarOnValueChanged(object obj, EventArgs ea)
{
for (int i = 0; i < 3; i++)
if((TrackBar) obj == atrackbar[i])
alabelValue[i].Text = atrackbar[i].Value.ToString();
BackColor = Color.FromArgb(atrackbar[0].Value,
atrackbar[1].Value,
atrackbar[2].Value);
}
}</source>
TractBar Large/Small range
<source lang="csharp">using System; using System.Drawing; using System.Windows.Forms; public class TrackBars : Form {
Panel pnl;
PictureBox pb;
TrackBar htbar;
TrackBar vtbar;
public TrackBars()
{
Size = new Size(500,520);
Image img = Image.FromFile("YourFile.bmp");
pnl = new Panel();
pnl.Parent = this;
pnl.BorderStyle = BorderStyle.FixedSingle;
pnl.Size = new Size(400,400);
pnl.Location = new Point(10,10);
pb = new PictureBox();
pb.Parent = pnl;
pb.Size = new Size(200, 200);
pb.Location = new Point((pnl.Size.Width / 2) - (pb.Size.Width / 2),
(pnl.Size.Height / 2) - (pb.Size.Height /2));
pb.BorderStyle = BorderStyle.FixedSingle;
pb.SizeMode = PictureBoxSizeMode.StretchImage;
pb.Image = img;
htbar = new TrackBar();
htbar.Parent = this;
htbar.Orientation = Orientation.Horizontal;
htbar.Size = new Size(pnl.Width, 10);
htbar.Location = new Point(pnl.Left, pnl.Bottom + 25);
htbar.TickStyle = TickStyle.BottomRight;
htbar.TickFrequency = 25;
htbar.Minimum = 25;
htbar.Maximum = 400;
htbar.SmallChange = 10;
htbar.LargeChange = 25;
htbar.BackColor = Color.Yellow;
htbar.Value = pb.Width;
htbar.ValueChanged += new EventHandler(htbar_OnValueChanged);
vtbar = new TrackBar();
vtbar.Parent = this;
vtbar.Orientation = Orientation.Vertical;
vtbar.Size = new Size(25, pnl.Height);
vtbar.Location = new Point(pnl.Right + 25, pnl.Top);
vtbar.TickStyle = TickStyle.Both;
vtbar.SetRange(25,400);
vtbar.SmallChange = 10;
vtbar.LargeChange = 50;
vtbar.TickFrequency = vtbar.Maximum / 20;
vtbar.BackColor = Color.Pink;
vtbar.Value = pb.Height;
vtbar.ValueChanged += new EventHandler(vtbar_OnValueChanged);
}
private void htbar_OnValueChanged(object sender, EventArgs e)
{
pb.Size = new Size(htbar.Value, pb.Height);
}
private void vtbar_OnValueChanged(object sender, EventArgs e)
{
pb.Size = new Size(pb.Width, vtbar.Value);
}
static void Main()
{
Application.Run(new TrackBars());
}
}</source>
