实例介绍
【实例简介】
【实例截图】
【核心代码】
Imports System.ComponentModel
<DefaultEvent("时间调整")> _
Public Class 可调时钟
Private CenterPoint As New Point(128, 128)
Private B As Bitmap = Nothing
Private _秒 As Bitmap = Nothing
Private _时 As Bitmap = Nothing
Private _分 As Bitmap = Nothing
Private Dt As Date = Now
Private _SelLayer As Integer = 0
Private _PM As Boolean = False
Public Event 时间调整(Dt As Date)
Private PMRct As New Rectangle(99, 85, 60, 25)
Private Sub 可调时钟_Load(sender As Object, e As EventArgs) Handles MyBase.Load
MakeBg()
End Sub
Private Sub MakeBg()
Try
If Me.Created = False Then Exit Sub
Dim Rg As New Region
B = Nothing
B = New Bitmap(255, 255)
Dim Lst As Single() = GetAng(Dt)
Using G As Graphics = Graphics.FromImage(B)
G.Clip = New Region(New Rectangle(0, 0, 255, 255))
If _PM = False Then
G.DrawImage(My.Resources.time1, New Rectangle(0, 0, 255, 255), New Rectangle(0, 0, 255, 255), GraphicsUnit.Pixel)
Else
G.DrawImage(My.Resources.time2, New Rectangle(0, 0, 255, 255), New Rectangle(0, 0, 255, 255), GraphicsUnit.Pixel)
End If
G.TranslateTransform(CenterPoint.X, CenterPoint.Y)
G.RotateTransform(Lst(0))
Make_秒(Lst(0))
G.DrawImage(My.Resources.秒针, New Rectangle(-5, -100, 10, 130), New Rectangle(0, 0, 10, 130), GraphicsUnit.Pixel)
G.ResetTransform()
G.TranslateTransform(CenterPoint.X, CenterPoint.Y)
G.RotateTransform(Lst(1))
Make_分(Lst(1))
G.DrawImage(My.Resources.分针, New Rectangle(-7, -90, 11, 100), New Rectangle(0, 0, 11, 100), GraphicsUnit.Pixel)
G.ResetTransform()
G.TranslateTransform(CenterPoint.X, CenterPoint.Y)
G.RotateTransform(Lst(2))
Make_时(Lst(2))
G.DrawImage(My.Resources.时针, New Rectangle(-11, -55, 23, 67), New Rectangle(0, 0, 23, 67), GraphicsUnit.Pixel)
G.ResetTransform()
End Using
Me.BackgroundImage = B
Catch
End Try
End Sub
Private Sub Make_秒(Ang As Single)
Try
_秒 = Nothing
_秒 = New Bitmap(255, 255)
Using G As Graphics = Graphics.FromImage(_秒)
G.Clip = New Region(New Rectangle(0, 0, 255, 255))
G.TranslateTransform(CenterPoint.X, CenterPoint.Y)
G.RotateTransform(Ang)
G.DrawImage(My.Resources.秒针, New Rectangle(-5, -100, 10, 130), New Rectangle(0, 0, 10, 130), GraphicsUnit.Pixel)
End Using
'DSAPI.图形图像.图像特效.色彩.亮度(_秒, 128)
Catch
End Try
End Sub
Private Sub Make_分(Ang As Single)
Try
_分 = Nothing
_分 = New Bitmap(255, 255)
Using G As Graphics = Graphics.FromImage(_分)
G.Clip = New Region(New Rectangle(0, 0, 255, 255))
G.TranslateTransform(CenterPoint.X, CenterPoint.Y)
G.RotateTransform(Ang)
G.DrawImage(My.Resources.分针, New Rectangle(-7, -90, 11, 100), New Rectangle(0, 0, 11, 100), GraphicsUnit.Pixel)
End Using
'DSAPI.图形图像.图像特效.色彩.亮度(_分, 128)
Catch
End Try
End Sub
Private Sub Make_时(Ang As Single)
Try
_时 = Nothing
_时 = New Bitmap(255, 255)
Using G As Graphics = Graphics.FromImage(_时)
G.Clip = New Region(New Rectangle(0, 0, 255, 255))
G.TranslateTransform(CenterPoint.X, CenterPoint.Y)
G.RotateTransform(Ang)
G.DrawImage(My.Resources.时针, New Rectangle(-11, -55, 23, 67), New Rectangle(0, 0, 23, 67), GraphicsUnit.Pixel)
'DSAPI.图形图像.图像特效.色彩.亮度(_时, 128)
End Using
Catch
End Try
End Sub
Private Function GetAng(Tm As Date) As Single()
Dim Lst As New List(Of Single)
Lst.Add(0) '秒
Lst.Add(0) '分
Lst.Add(0) '时
Try
Lst(0) = 360 / 60 * Tm.Second
Lst(1) = 360 / 60 * Tm.Minute 6 / 60 * Tm.Second
Dim H As Integer = Tm.Hour
If H > 11 Then H -= 12
Lst(2) = 360 / 12 * Tm.Hour 30 / 60 * Tm.Minute
Catch
End Try
Return Lst.ToArray
End Function
Private Sub 可调时钟_MouseClick(sender As Object, e As MouseEventArgs) Handles Me.MouseClick
If e.Button = Windows.Forms.MouseButtons.Left Then
If PMRct.Contains(e.Location) Then
_PM = Not _PM
Dim H As Integer = Dt.Hour
If _PM = True Then
H = 12
If H > 23 Then H = 23
Else
H -= 12
If H < 0 Then H = 0
End If
Dt = New Date(Dt.Year, Dt.Month, Dt.Day, H, Dt.Minute, Dt.Second)
MakeBg()
RaiseEvent 时间调整(Dt)
End If
End If
End Sub
Private Sub 可调时钟_MouseDown(sender As Object, e As MouseEventArgs) Handles Me.MouseDown
If e.Button = Windows.Forms.MouseButtons.Left Then
If e.X >= 0 AndAlso e.Y >= 0 AndAlso e.X <= 255 AndAlso e.Y <= 255 Then
Dim IsCatched As Boolean = False
If IsCatched = False AndAlso _时.GetPixel(e.X, e.Y).A > 10 Then
_SelLayer = 1
IsCatched = True
End If
If IsCatched = False AndAlso _分.GetPixel(e.X, e.Y).A > 10 Then
_SelLayer = 2
IsCatched = True
End If
If IsCatched = False AndAlso _秒.GetPixel(e.X, e.Y).A > 10 Then
_SelLayer = 3
IsCatched = True
End If
If IsCatched Then
Cursor = Cursors.Hand
MakeBg()
Else
_SelLayer = 0
Cursor = Cursors.Default
End If
End If
End If
End Sub
Private Sub 可调时钟_MouseMove(sender As Object, e As MouseEventArgs) Handles Me.MouseMove
If e.X >= 0 AndAlso e.Y >= 0 AndAlso e.X <= 255 AndAlso e.Y <= 255 Then
If _时.GetPixel(e.X, e.Y).A > 10 OrElse _分.GetPixel(e.X, e.Y).A > 10 OrElse _秒.GetPixel(e.X, e.Y).A > 10 Then
Cursor = Cursors.Hand
Else
If PMRct.Contains(e.Location) Then
Cursor = Cursors.Hand
Else
Cursor = Cursors.Default
End If
End If
Else
Exit Sub
End If
If _SelLayer = 0 Then Exit Sub
If e.Button = Windows.Forms.MouseButtons.Left Then
Dim H As Integer = 0
Try
Select Case _SelLayer
Case 1
H = 11 / 360 * GetAng(e.Location)
If _PM = True Then
H = 12
If H > 23 Then H = 23
End If
Dt = New Date(Dt.Year, Dt.Month, Dt.Day, H, Dt.Minute, Dt.Second)
Case 2
H = 59 / 360 * GetAng(e.Location)
Dt = New Date(Dt.Year, Dt.Month, Dt.Day, Dt.Hour, H, Dt.Second)
Case 3
H = 59 / 360 * GetAng(e.Location)
Dt = New Date(Dt.Year, Dt.Month, Dt.Day, Dt.Hour, Dt.Minute, H)
End Select
MakeBg()
Catch
End Try
RaiseEvent 时间调整(Dt)
End If
End Sub
Private Function GetAng(Pt As Point) As Double
'斜边=Math.Sqrt(A ^ 2 B ^ 2)
'夹角=90 - (Math.Asin(A / 斜边) / Math.PI * 180)
Dim H As Double = 0
Dim Pt1 As New Point(Pt.X - Me.Width / 2, Pt.Y - Me.Height / 2)
H = Math.Sqrt(Pt1.X ^ 2 Pt1.Y ^ 2)
If Pt1.X < 0 AndAlso Pt1.Y < 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.X) / H) / Math.PI * 180)
H = 270
End If
If Pt1.X > 0 AndAlso Pt1.Y > 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.X) / H) / Math.PI * 180)
H = 90
End If
If Pt1.X < 0 AndAlso Pt1.Y > 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.Y) / H) / Math.PI * 180)
H = 180
End If
If Pt1.X > 0 AndAlso Pt1.Y < 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.Y) / H) / Math.PI * 180)
End If
If Pt1.X = 0 AndAlso Pt1.Y > 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.X) / H) / Math.PI * 180)
End If
If Pt1.X = 0 AndAlso Pt1.Y < 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.Y) / H) / Math.PI * 180)
End If
If Pt1.X < 0 AndAlso Pt1.Y = 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.X) / H) / Math.PI * 180)
End If
If Pt1.X > 0 AndAlso Pt1.Y = 0 Then
H = 90 - (Math.Asin(Math.Abs(Pt1.Y) / H) / Math.PI * 180)
End If
If H > 360 Then H = 360
Return H
End Function
Private Sub 可调时钟_MouseUp(sender As Object, e As MouseEventArgs) Handles Me.MouseUp
_SelLayer = 0
End Sub
End Class
标签： 时钟
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