私はC#の新機能です。アナログ時計の時刻を編集するには、そのハンドルをドラッグしてください。 https://code.msdn.microsoft.com/windowsapps/Analog-Clock-Control-0e8ffcab#contentこのコードは私を魅了しました。私は3つの単純な関数MouseDown、MouseMoveとMouseUpを持っていますが、私はDragを動作させることができません。何か提案してください?アナログ時計の時刻をリセットする方法ハンドルをドラッグしてC#
public partial class Form1 : Form
{
#region Construct the clock
public Point Start { get; set; }
public Point End { get; set; }
public Form1()
{
InitializeComponent();
DoubleBuffered = true;
//Create the timer and start it
ClockTimer.Tick += ClockTimer_Tick;
ClockTimer.Enabled = true;
ClockTimer.Interval = 1;
ClockTimer.Start();
Start = p1;
End = p2;
}
#endregion
#region Update the clock
private void ClockTimer_Tick(object sender, EventArgs e)
{
Refresh();
}
private Timer ClockTimer = new Timer();
private Pen circle = new Pen(Color.Black, 2);
private Pen secondHandle = new Pen(Color.Red, 1);
private Pen minHandle = new Pen(Color.Black, 5);
private Pen hrHandle = new Pen(Color.Black, 5);
private Point p1;
private Point p2;
#endregion
#region On paint
protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
//Clear the graphics to the back color of the control
pe.Graphics.Clear(BackColor);
//Draw the border of the clock
pe.Graphics.DrawEllipse(circle, 0, 0, 300, 300);
//Find the radius of the control by dividing the width by 2
float radius = (300/2);
//Find the origin of the circle by dividing the width and height of the control
PointF origin = new PointF(300/2, 300/2);
//Draw only if ShowMajorSegments is true;
if (ShowMajorSegments)
{
//Draw the Major segments for the clock
for (float i = 0f; i != 390f; i += 30f)
{
pe.Graphics.DrawLine(Pens.White, PointOnCircle(radius - 1, i, origin), PointOnCircle(radius - 21, i, origin));
}
}
//Draw only if ShowMinorSegments is true
if (ShowMinorSegments)
{
//Draw the minor segments for the control
for (float i = 0f; i != 366f; i += 6f)
{
pe.Graphics.DrawLine(Pens.Black, PointOnCircle(radius, i, origin), PointOnCircle(radius - 10, i, origin));
}
}
//Draw only if ShowSecondHand is true
if (ShowSecondhand)
//Draw the second hand
pe.Graphics.DrawLine(secondHandle, origin, PointOnCircle(radius, DateTime.Now.Second * 6f, origin));
//Draw only if ShowMinuteHand is true
if (ShowMinuteHand)
//Draw the minute hand
pe.Graphics.DrawLine(minHandle, origin, PointOnCircle(radius * 0.75f, DateTime.Now.Minute * 6f, origin));
minHandle.StartCap = LineCap.RoundAnchor;
minHandle.EndCap = LineCap.ArrowAnchor;
pe.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
pe.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//Draw only if ShowHourHand is true
if (ShowHourHand)
//Draw the hour hand
pe.Graphics.DrawLine(hrHandle, origin, PointOnCircle(radius * 0.50f, DateTime.Now.Hour * 30f, origin));
hrHandle.StartCap = LineCap.RoundAnchor;
hrHandle.EndCap = LineCap.ArrowAnchor;
pe.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
pe.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
}
#endregion
#region On size changed
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
//Make sure the control is square
if (Size.Height != Size.Width)
Size = new Size(Size.Width, Size.Width);
//Redraw the control
Refresh();
}
#endregion
#region Point on circle
private PointF PointOnCircle(float radius, float angleInDegrees, PointF origin)
{
//Find the x and y using the parametric equation for a circle
float x = (float)(radius * Math.Cos((angleInDegrees - 90f) * Math.PI/180F)) + origin.X;
float y = (float)(radius * Math.Sin((angleInDegrees - 90f) * Math.PI/180F)) + origin.Y;
return new PointF(x, y);
}
#endregion
#region Show Minor Segments
private bool showMinorSegments = true;
public bool ShowMinorSegments
{
get
{
return showMinorSegments;
}
set
{
showMinorSegments = value;
Refresh();
}
}
#endregion
#region Show Major Segments
private bool showMajorSegments = true;
public bool ShowMajorSegments
{
get
{
return showMajorSegments;
}
set
{
showMajorSegments = value;
Refresh();
}
}
#endregion
#region Show Second Hand
private bool showSecondHand = false;
public bool ShowSecondhand
{
get
{
return showSecondHand;
}
set
{
showSecondHand = value;
Refresh();
}
}
#endregion
#region Show Minute Hand
private bool showMinuteHand = true;
public bool ShowMinuteHand
{
get
{
return showMinuteHand;
}
set
{
showMinuteHand = value;
Refresh();
}
}
#endregion
#region Show Hour Hand
private bool showHourHand = true;
public bool ShowHourHand
{
get
{
return showHourHand;
}
set
{
showHourHand = value;
Refresh();
}
}
#endregion
public float slope
{
get
{
return (((float)p2.Y - (float)p1.Y)/((float)p2.X - (float)p1.X));
}
}
public float YIntercept
{
get
{
return p1.Y - slope * p1.X;
}
}
public bool IsPointOnLine(Point p, int cushion)
{
float temp = (slope * p.X + YIntercept);
if (temp >= (p.Y - cushion) && temp <= (p.Y + cushion))
{
return true;
}
else
{
return false;
}
}
Point deltaStart;
Point deltaEnd;
bool dragging = false;
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left && IsPointOnLine(e.Location, 5))
{
dragging = true;
deltaStart = new Point(p1.X - e.Location.X, p1.Y - e.Location.Y);
deltaEnd = new Point(p2.X - e.Location.X, p2.Y - e.Location.Y);
}
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (dragging && deltaStart != null && deltaEnd != null)
{
p1 = new Point(deltaStart.X + e.Location.X, deltaStart.Y + e.Location.Y);
p2 = new Point(deltaEnd.X + e.Location.X, deltaEnd.Y + e.Location.Y);
this.Refresh();
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
dragging = false;
}
}
「でもドラッグは動作しません」とはどういう意味ですか?あなたの描画は 'DateTime.Now'に基づいており、' Start'と 'End'変数はほとんど使われていません。あなたが望むものをより具体的にしてください。良い出発点は、マウスが現在Form1_MouseMoveにある点の角度を決定し、その角度に基づいて追加の線を描くことです。 – grek40
お返事ありがとうございますgrek40、私は 'Start'と' End'変数を使用することに関するあなたの提案を実装して私の質問を編集しましたが、私はマウスがあるポイントの角度を決定するためにわずかな困難を抱えています。 – Tony