Il Mouse
Mouse
C1. Mouse position with reference to the Form
C1. Posizione Mouse con riferimento al Form Inserire 2 TextBox e 3 Label Il colore giallo dello sfondo cambia in rosso se si supera la coordinata X impostata.
C2. Assegnare un’attività al Mouse e delimitarla in uno spazio Inserire 2 TextBox e 2 Label
 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load         'Risoluzione schermo         Dim intX As Integer = Screen.PrimaryScreen.Bounds.Width         Dim intY As Integer = Screen.PrimaryScreen.Bounds.Height         Timer1.Enabled = True         TextBox1.Text = intX & " X " & intY     End Sub     Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick         TextBox1.Text = System.Windows.Forms.Cursor.Position.X.ToString 'Posizione X         TextBox2.Text = System.Windows.Forms.Cursor.Position.Y.ToString  'Posizione Y     End Sub
C2. Mouse position with reference to the screen Insert two TextBoxes and two Labels.
 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load         Label3.Text = "Posizione X, Y"         Label1.Text = "Form : "         Label2.Text = "Schermo (tasto sx): "         Timer1.Start()         Timer1.Interval = 100     End Sub     'Trova la posizione nello schermo     Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick         Dim x As Integer         Dim y As Integer         If MouseButtons = Windows.Forms.MouseButtons.Left Then             x = MousePosition.X             y = MousePosition.Y             TextBox1.Text = (x & "   " & y)         End If     End Sub     'Trova la posizione nel Form     Private Sub form1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs) Handles _  Me.MouseMove         TextBox2.Text = e.X & "   " & e.Y 'Scrive le coordinate         If e.X > 150 Then             Me.BackColor = Color.Red         Else             Me.BackColor = Color.Yellow         End If     End Sub
C3. Rappresentare le attività del mouse Inserire tre Label.
C3.  Representing mouse activities Insert 3 Labels.
Insert 2 TextBox and 3 Label The yellow color of the background changes to red if you exceed the set X coordinate.
  Private Sub Form1_MouseEvent(ByVal sender As Object, ByVal e As MouseEventArgs) _         Handles MyBase.MouseDown, MyBase.MouseUp, MyBase.MouseMove, MyBase.MouseWheel         Label1.Text = ("Mouse Buttons  : " & e.Button.ToString)         Label3.Text = String.Format("x={0}   y={1}   Clicks={2}   Delta={3}", e.X, e.Y, e.Clicks, e.Delta)         'Usare Location per leggere le coordinate         Label2.Text = e.Location.ToString     End Sub
C4. Assegnare attività al mouse All’interno del rettangolo il cursore cambia forma ed esegue un beep quando si clicca con il tasto sinistro. Dimensionare il Form1 a 300x300 e inserire il seguente listato
Dim hotspot1 As Rectangle = New Rectangle(50, 50, 150, 150)     Private Sub Form1_MouseClick(sender As Object, e As MouseEventArgs) Handles Me.MouseClick         If hotspot1.Contains(e.X, e.Y) Then             Beep()         End If     End Sub     Private Sub Form1_MouseMove(sender As Object, e As MouseEventArgs) Handles Me.MouseMove         If hotspot1.Contains(e.X, e.Y) Then             Cursor = Cursors.Hand         Else             Cursor = Cursors.Default         End If     End Sub
C4. Assegnare attività al mouse Inside the rectangle the cursor changes shape and beeps when the left button is clicked. Size Form1 to 300x300 and enter the following code
C5. Delimitare l’area di attività del mouse Il mouse è attivo solo all’interno del Panel o all’interno del Form. Creare un nuovo progetto con un Form 300x300, tre Button ed un Panel 200x200 Inserire il Button3 all'interno di Panel1.
C5. Delimit the mouse activity area The mouse is active only within the Panel or within the Form. Create a new project with a 300x300 Form, three Buttons and a 200x200 Panel Inserire il Button3 all'interno di Panel1.
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load         Panel1.BackColor = Color.Bisque     End Sub     Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click         'Il cursore si muove solo all'interno di Panel1         Cursor.Clip = New Rectangle(Me.Panel1.Left + Me.Left,         Me.Panel1.Top + Me.Top, Me.Panel1.Width, Me.Panel1.Height)     End Sub     Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click         'Il cursore si muove solo all'interno del Form         Cursor.Clip = New Rectangle(Me.Left, Me.Top, Me.Width, Me.Height)     End Sub     Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click         Close()     End Sub
C6. Sposta il cursore da una posizione ad un’altra Inserire il Button1 in basso a destra del Form1.
C6. Move the cursor from one position to another Insert Button1 at the bottom right of Form1.
 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click         Me.Cursor = New Cursor(Cursor.Current.Handle)         Cursor.Position = New Point(Cursor.Position.X - 50, Cursor.Position.Y - 50)         System.Threading.Thread.Sleep(500)         Cursor.Position = New Point(Cursor.Position.X - 50, Cursor.Position.Y - 50)         System.Threading.Thread.Sleep(500)         Cursor.Position = New Point(Cursor.Position.X - 50, Cursor.Position.Y + 50)     End Sub
C7. Altri esempi gestione Mouse Inserire 3 Button 1 TextBox e 5 Label come da immagine.
  Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click         Cursor = System.Windows.Forms.Cursors.Hand 'cambia aspetto cursore in croce     End Sub     Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click         Cursor = System.Windows.Forms.Cursors.Cross ‘cambia aspetto cursore in mano     End Sub     Private Sub TextBox1_MouseEnter(sender As Object, e As EventArgs) Handles TextBox1.MouseEnter         TextBox1.BackColor = Color.Blue ‘cambia colore sfondo         TextBox1.ForeColor = Color.White     End Sub     Private Sub TextBox1_MouseLeave(sender As Object, e As EventArgs) Handles TextBox1.MouseLeave         TextBox1.BackColor = Color.White ‘ripristina colore sfondo         TextBox1.ForeColor = Color.Blue     End Sub     Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click         Cursor.Position = Me.PointToScreen(Label1.Location) ‘‘posiziona cursore su Label1     End Sub
C7. Altri esempi gestione Mouse Insert 3 Button 1 TextBox e 5 Label
C8. Accompagnare un testo al cursore Inserire  1 TextBox e 1 Label. La parola Puntamento segue il cursore distanziata di 30 pixel a dx e 10 in basso
C8. Accompanying a text to the cursor Insert  1 TextBox e 1 Label. The word Puntamento follows the cursor spaced 30 pixels to the right and 10 below.
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load         TextBox1.Text = "Puntamento"     End Sub Private Sub Form1_MouseMove(sender As Object, e As MouseEventArgs) Handles Me.MouseMove         Me.TextBox1.Location = New System.Drawing.Point(e.X + 30, e.Y + 10)     End Sub
C9. Accompagnare un’immagine al cursore Inserire  1 Panel size 40x40 L’icona segue il cursore distanziata di 10 pixel a dx e 10 in basso
 Private Immagine As System.Drawing.Bitmap    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) _         Handles MyBase.Load         Immagine = New System.Drawing.Bitmap("J:\Immagini\Icone\Scopa.png")         Panel1.Visible = False     End Sub     Private Sub Form1_MouseMove(sender As Object, e As MouseEventArgs) Handles Me.MouseMove         Panel1.Visible = True 'Il Panel viene reso visibile         Panel1.Left = e.X + 10         Panel1.Top = e.Y + 10     End Sub     Private Sub Panel1_Paint(sender As Object, e As PaintEventArgs) Handles Panel1.Paint         e.Graphics.DrawImage(Immagine, 1, 1, 40, 40)     End Sub
C9. Accompanying an image to the cursor Insert 1 Panel 40x40 The icon follows the cursor spaced 10 pixels to the right and 10 pixels downwards
C10.  Far seguire un’immagine al cursore con effetto “elastico” (Trackball) Una pallina segue in modo inerziale il cursore e rimbalza quando tocca i bordi dello schermo. La grafica (Backcolor e TransparencyKey etc) configurata opzionalmente per annullare lo sfondo dell’immagine bmp. Immagine e file wav possono essere scaricati qui. .bmp file .wav file Questo esempio è uno spunto interessante per sviluppare applicazioni di grafica dinamica
C9. Follow a cursor image with "elastic" effect (Trackball) A ball follows the cursor inertially and bounces when it touches the edges of the screen. The graphics (Backcolor and TransparencyKey etc) optionally configured to cancel the background of the bmp image. Image and wav files can be downloaded here. .bmp file .wav file This example is an interesting starting point for developing dynamic graphics applications
'Fonte: http://www.vb-fun.de Public Class Form1     Dim TSpeed As Integer = 1  'Decelerazione della palla     Dim Speed() As Double = {0, 0}  'Spinta     Dim RB As Double = 0.2   'Attrito     Dim BS As Double = 0.5   'Forza di attrazione del mouse     Dim MaxSpeed As Integer = 20 'Velocità massima della palla     Dim MPos As Point  'Posizione del mouse     'Limiti dello schermo     Dim Bound As Point = New Point(My.Computer.Screen.Bounds.Width, My.Computer.Screen.Bounds.Height)     '     'Percorsi di file predefiniti     Dim UP As String = My.Computer.FileSystem.CurrentDirectory & "\data\"     Dim IP As String = UP & "gfx\" 'L'immagine .bmp 22x22 va posta in questa cartella     Dim SP As String = UP & "sound\" 'Il file .wav va posto in questa cartella Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load         Me.Size = New Size(22, 22)         Me.BackColor = Color.Fuchsia 'corrisponde al colore di sfondo dell'immagine         Me.TransparencyKey = Color.Fuchsia  'corrisponde al colore di sfondo dell'immagine         Me.ShowIcon = False         Me.ShowInTaskbar = False         Me.StartPosition = FormStartPosition.CenterScreen         LoadImages()         Timer1.Interval = TSpeed     End Sub     'Carica il file immagine     Sub LoadImages()         BackgroundImage = Image.FromFile(IP & "Blackball.bmp")     End Sub     Private Sub Timer1_Tick_1(sender As Object, e As EventArgs) Handles Timer1.Tick         GetMPos()         'Controlla la posizione del mouse e poi sposta la palla         If MPos.X < Location.X Then             Speed(0) -= BS         End If         If MPos.X > Location.X Then             Speed(0) += BS         End If         If MPos.Y < Location.Y Then             Speed(1) -= BS         End If         If MPos.Y > Location.Y Then             Speed(1) += BS         End If         BoundingSpeed()         Collision()         SpeedDown(RB, 0)         SpeedDown(RB, 1)         Location += New Point(Speed(0), Speed(1))     End Sub     'Controllo delle collisioni     Sub Collision()         If Location.X <= 0 Then             Location = New Point(1, Location.Y)             Speed(0) *= -1             My.Computer.Audio.Play(SP & "ballcollision.wav", AudioPlayMode.Background)         End If         If Location.X >= Bound.X - 20 Then             Location = New Point(Bound.X - 21, Location.Y)             Speed(0) *= -1             My.Computer.Audio.Play(SP & "ballcollision.wav", AudioPlayMode.Background)         End If         If Location.Y <= 0 Then             Location = New Point(Location.X, 1)             Speed(1) *= -1             My.Computer.Audio.Play(SP & "ballcollision.wav", AudioPlayMode.Background)         End If         If Location.Y >= Bound.Y - 20 Then             Location = New Point(Location.X, Bound.Y - 21)             Speed(1) *= -1             My.Computer.Audio.Play(SP & "ballcollision.wav", AudioPlayMode.Background)         End If     End Sub     'limita la  velocità massima se viene superata     Sub BoundingSpeed()         If Speed(0) < -MaxSpeed Then             Speed(0) = -MaxSpeed         End If         If Speed(0) > MaxSpeed Then             Speed(0) = MaxSpeed         End If         If Speed(1) < -MaxSpeed Then             Speed(1) = -MaxSpeed         End If         If Speed(1) > MaxSpeed Then             Speed(1) = MaxSpeed         End If     End Sub     'Decelera la sfera (attrito)     Sub SpeedDown(ByVal Value As Double, ByVal ax As Integer)         If Speed(ax) < 0 Then             Speed(ax) += Value         ElseIf Speed(ax) > 0 Then             Speed(ax) -= Value         End If     End Sub     'Scrive la posizione corrente del mouse in MPos     Sub GetMPos()         MPos = New Point(Control.MousePosition.X - 10, Control.MousePosition.Y - 10)     End Sub     Private Sub Form1_Click(sender As Object, e As EventArgs) Handles Me.Click         'Click sulla pallina per uscire         Application.Exit()     End Sub End Class
C11.  Visualizzare un TextBox al passaggio del mouse sopra un controllo Inserire nel form 2 RadioButton e 1 Label Al passaggio del cursore sui RadioButton TextBox diventa visibile e il RdioButton corrispondente diventa attivo.
C11.  Display a TextBox when move the mouse over a control Insert in the form 2 RadioButton and 1 Label As the cursor passes over the RadioButton TextBox becomes visible and the corresponding RdioButton becomes active.
 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load         With RadioButton1             AddHandler .MouseMove, AddressOf mouseRB1In             AddHandler .MouseLeave, AddressOf mouseRB1Out         End With         With RadioButton2             AddHandler .MouseMove, AddressOf mouseRB2In             AddHandler .MouseLeave, AddressOf mouseRB2Out         End With     End Sub     Private Sub mouseRB1In(ByVal sender As System.Object, ByVal e As System.EventArgs)         If RadioButton1.Focus = True Then             TextBox1.Visible = True             TextBox1.Text = ("vbnetapplications.com")         End If     End Sub     Private Sub mouseRB1Out(ByVal sender As System.Object, ByVal e As System.EventArgs)         TextBox1.Visible = False         TextBox1.Text = ("")     End Sub     Private Sub mouseRB2In(ByVal sender As System.Object, ByVal e As System.EventArgs)         If RadioButton2.Focus = True Then             TextBox1.Visible = True             TextBox1.Text = ("http://codetips.vbnetapplications.com/")         End If     End Sub     Private Sub mouseRB2Out(ByVal sender As System.Object, ByVal e As System.EventArgs)         TextBox1.Visible = False         TextBox1.Text = ("")     End Sub
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