在C#Windows窗体中使用模拟时钟
本文关键字:模拟 时钟 C#Windows 窗体 | 更新日期: 2023-09-27 18:22:39
我需要在C#中的windows窗体菜单页中制作一个模拟时钟。
我创建了一个名为"AnalogControl"的用户控件。它使用定时器,下面是它的代码:-
public partial class AnalogClock : UserControl
{
const float PI = 3.141592654F;
DateTime dateTime;
float fRadius, fCenterX, fCenterY, fCenterCircleRadius, fHourLength;
float fMinLength, fSecLength, fHourThickness, fMinThickness, fSecThickness;
bool bDraw5MinuteTicks = true;
bool bDraw1MinuteTicks = true;
float fTicksThickness = 2;
Color hrColor = Color.Black;
Color minColor = Color.Black;
Color secColor = Color.Black;
Color circleColor = Color.Black;
Color ticksColor = Color.Black;
public AnalogClock()
{
InitializeComponent();
}
private void AnalogClock_Load(object sender, EventArgs e)
{
dateTime = DateTime.Now;
this.AnalogClock_Resize(sender, e);
}
private void DrawLine(float fThickness, float fLength, Color color, float fRadians,
System.Windows.Forms.PaintEventArgs e)
{
e.Graphics.DrawLine(new Pen(color, fThickness),
fCenterX - (float)(fLength / 9 * System.Math.Sin(fRadians)),
fCenterY + (float)(fLength / 9 * System.Math.Cos(fRadians)),
fCenterX + (float)(fLength * System.Math.Sin(fRadians)),
fCenterY - (float)(fLength * System.Math.Cos(fRadians)));
}
private void DrawPolygon(float fThickness, float fLength, Color color, float fRadians,
System.Windows.Forms.PaintEventArgs e)
{
PointF A = new PointF((float)(fCenterX + fThickness * 2 * System.Math.Sin(fRadians + PI / 2)),
(float)(fCenterY - fThickness * 2 * System.Math.Cos(fRadians + PI / 2)));
PointF B = new PointF((float)(fCenterX + fThickness * 2 * System.Math.Sin(fRadians - PI / 2)),
(float)(fCenterY - fThickness * 2 * System.Math.Cos(fRadians - PI / 2)));
PointF C = new PointF((float)(fCenterX + fLength * System.Math.Sin(fRadians)),
(float)(fCenterY - fLength * System.Math.Cos(fRadians)));
PointF D = new PointF((float)(fCenterX - fThickness * 4 * System.Math.Sin(fRadians)),
(float)(fCenterY + fThickness * 4 * System.Math.Cos(fRadians)));
PointF[] points = { A, D, B, C };
e.Graphics.FillPolygon(new SolidBrush(color), points);
}
private void AnalogClock_Paint(object sender,
System.Windows.Forms.PaintEventArgs e)
{
float fRadHr = (dateTime.Hour % 12 + dateTime.Minute / 60F) * 30 * PI / 180;
float fRadMin = (dateTime.Minute) * 6 * PI / 180;
float fRadSec = (dateTime.Second) * 6 * PI / 180;
DrawPolygon(this.fHourThickness,
this.fHourLength, hrColor, fRadHr, e);
DrawPolygon(this.fMinThickness,
this.fMinLength, minColor, fRadMin, e);
DrawLine(this.fSecThickness,
this.fSecLength, secColor, fRadSec, e);
for (int i = 0; i < 60; i++)
{
if (this.bDraw5MinuteTicks == true && i % 5 == 0)
// Draw 5 minute ticks
{
e.Graphics.DrawLine(new Pen(ticksColor, fTicksThickness),
fCenterX +
(float)(this.fRadius / 1.50F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY -
(float)(this.fRadius / 1.50F * System.Math.Cos(i * 6 * PI / 180)),
fCenterX +
(float)(this.fRadius / 1.65F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY -
(float)(this.fRadius / 1.65F * System.Math.Cos(i * 6 * PI / 180)));
}
else if (this.bDraw1MinuteTicks == true) // draw 1 minute ticks
{
e.Graphics.DrawLine(new Pen(ticksColor, fTicksThickness),
fCenterX +
(float)(this.fRadius / 1.50F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY -
(float)(this.fRadius / 1.50F * System.Math.Cos(i * 6 * PI / 180)),
fCenterX +
(float)(this.fRadius / 1.55F * System.Math.Sin(i * 6 * PI / 180)),
fCenterY -
(float)(this.fRadius / 1.55F * System.Math.Cos(i * 6 * PI / 180)));
}
}
//draw circle at center
e.Graphics.FillEllipse(new SolidBrush(circleColor),
fCenterX - fCenterCircleRadius / 2,
fCenterY - fCenterCircleRadius / 2,
fCenterCircleRadius, fCenterCircleRadius);
}
private void AnalogClock_Resize(object sender, EventArgs e)
{
this.Width = this.Height;
this.fRadius = this.Height / 2;
this.fCenterX = this.ClientSize.Width / 2;
this.fCenterY = this.ClientSize.Height / 2;
this.fHourLength = (float)this.Height / 3 / 1.85F;
this.fMinLength = (float)this.Height / 3 / 1.20F;
this.fSecLength = (float)this.Height / 3 / 1.15F;
this.fHourThickness = (float)this.Height / 100;
this.fMinThickness = (float)this.Height / 150;
this.fSecThickness = (float)this.Height / 200;
this.fCenterCircleRadius = this.Height / 50;
timer1.Start();
}
public Color HourHandColor
{
get { return this.hrColor; }
set { this.hrColor = value; }
}
public Color MinuteHandColor
{
get { return this.minColor; }
set { this.minColor = value; }
}
public Color SecondHandColor
{
get { return this.secColor; }
set
{
this.secColor = value;
this.circleColor = value;
}
}
public Color TicksColor
{
get { return this.ticksColor; }
set { this.ticksColor = value; }
}
public bool Draw1MinuteTicks
{
get { return this.bDraw1MinuteTicks; }
set { this.bDraw1MinuteTicks = value; }
}
public bool Draw5MinuteTicks
{
get { return this.bDraw5MinuteTicks; }
set { this.bDraw5MinuteTicks = value; }
}
private void timer1_Tick(object sender, EventArgs e)
{
this.dateTime = DateTime.Now;
this.Refresh();
}
public void Start()
{
timer1.Enabled = true;
this.Refresh();
}
public void Stop()
{
timer1.Enabled = false;
}
}
我正在以这种方式在另一种形式的加载事件中使用此控件:-
this.analogClock1.Start();
但问题是,在我使用"模拟控制"的页面上,它只是显示了方框,但没有显示时钟,甚至时钟也没有工作。
请帮我写代码,这样我就可以在windows窗体上运行模拟时钟了。
您不能从与创建窗体的线程不同的线程访问windows窗体项。timer1_Tick
在不同的线程中执行,因此您应该调用UI线程。
将计时器处理程序更改为:
private void timer1_Tick(object sender, EventArgs e)
{
if (this.InvokeRequired())
{
EventHandler handler = new EventHandler(this.Timer1_Tick);
this.Invoke(handler, new object[]{sender, e});
}
else
{
this.dateTime = DateTime.Now;
this.Refresh();
}
}
我这里没有一个工具来检查代码是否编译,但它应该是这样的。
希望能有所帮助。
您提供的片段看起来非常像Syed Mehroz Alam的公开样本。通过快速检查他的代码,看起来您没有连接到计时器和表单本身的事件。
将以下内容添加到InitializeComponent()中即可:
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// timer1
//
this.timer1.Enabled = true;
this.timer1.Interval = 1000;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// AnalogClock
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Name = "AnalogClock";
this.Resize += new System.EventHandler(this.AnalogClock_Resize);
this.Load += new System.EventHandler(this.AnalogClock_Load);
this.Paint += new System.Windows.Forms.PaintEventHandler(this.AnalogClock_Paint);
this.ResumeLayout(false);
}
请注意,如果代码确实是从另一个开发人员那里借来的,或者受到了另一个开发者的启发,那么提及它被认为是一种礼貌