I want to Drag Move a userControl which is in a canvas(named as grd) and that canvas is in a larger canvas on which there are a lot of other controls. I am using this code, but it does not work. I am making mouseDown and MouseUpevents of userControl and a MouseMve event of the larger canvas which has a lot of controls.
Where is the problem?
Dim _pressed As Boolean = False
Dim grd As Canvas
Dim mp As Point
Private Sub DeviceIcon_MouseLeftButtonDown(ByVal sender As Object, ByVal e As System.Windows.Input.MouseButtonEventArgs)
_pressed = True
grd = sender
mp = mousePosition
End Sub
Private Sub DeviceIcon_MouseLeftButtonUp(ByVal sender As Object, ByVal e As System.Windows.Input.MouseButtonEventArgs)
_pressed = False
End Sub
Private Sub gridimgFloor_MouseMove(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseEventArgs) Handles gridimgFloor.MouseMove
If _pressed = False Then Exit Sub
Dim nmp As Point = mousePosition
Dim _x As Integer = nmp.X - mp.X
Dim _y As Integer = nmp.Y - mp.Y
Dim thk As Thickness = grd.Margin
thk.Left = thk.Left + _x
thk.Top = thk.Top + _y
grd.Margin = thk
mp = nmp
End Sub
You should use e.GetPosition(parentControl) to get the position from the event args.
Public Class Form2
Dim i As Integer = 0
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnMainMenu.Click
Me.Close()
End Sub
Private Sub btnEnterPatient_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnterPatient.Click
ReDim Preserve Names(0 To i)
Names(i) = txtPatientName.Text
ReDim Preserve Heights(0 To i)
Heights(i) = txtPatientHeight.Text
ReDim Preserve Weights(0 To i)
Weights(i) = txtPatientWeight.Text
i = i + 1
End Sub
End Class
This is my code for when I click a button to enter data into three arrays but when I click the button the i does not increment. Also if I don't enter anything into the Height or Weight textbox and press the button I get the error: Conversion from string "" to type 'Integer' is not valid.
What is the problem here?
Thanks
I have a textbox(textbox1) which when the WPF Window is loaded, it used the UserProfile variable to show the current user directory in textbox1.text
Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded
Dim defaultpath As String = Environment.CurrentDirectory
Environment.CurrentDirectory = Environment.GetEnvironmentVariable("UserProfile")
TextBox1.Text = defaultpath
End Sub
I also have a button that when clicked, uses FolderBrowserDialog to browse for folder then shows the new folder path in textbox1.text.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles Button1.Click
Dim fldDialog As New FolderBrowserDialog()
fldDialog.RootFolder = Environment.SpecialFolder.Desktop
fldDialog.ShowDialog()
Dim filepathstore As String = fldDialog.SelectedPath
TextBox1.Text = filepathstore
End Sub
The value now shows the path that was selected with FolderBrowserDialog.
How would I store this new value and when WPF Window is closed/reopen, displays this new value instead of the default value. (replace not delete default value)
This new value of the folderpath can change as many times as needed. However when a reset button is clicked, the WPF window goes back to default value.
It sounds like the easiest option is to save the value to a file that can be recalled at any time. The below code assume the value you want to save is in textbox1.text when the FormClosing event is called, and then loads it back into textbox1.text when the form is opened.
Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
Dim s As String
s = TextBox1.Text
Dim loc As String
loc = My.Computer.FileSystem.SpecialDirectories.MyDocuments & "/testfile.txt"
My.Computer.FileSystem.WriteAllText(loc, TextBox1.Text, False)
End Sub
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim loc As String
loc = My.Computer.FileSystem.SpecialDirectories.MyDocuments & "/testfile.txt"
Dim s As String
s = My.Computer.FileSystem.ReadAllText(loc)
TextBox1.Text = s
End Sub
Let me know if you have a problem with this :)
I am developing a WinForms application and I want a ListBox (or a control which provides list of strings) such that when the user hovers the mouse over an item it will show a delete sign for that particular item.
Is there any control available for WinForms to do this?
Setting the ListBox DrawMode to OwnerDrawFixed (or OwnerDrawVariable), you can just handle this yourself with the Mouse events:
Public Class Form1
Private _MouseIndex As Integer = -1
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
ListBox1.Items.Add("String #1")
ListBox1.Items.Add("String #2")
End Sub
Private Sub ListBox1_DrawItem(ByVal sender As Object, ByVal e As DrawItemEventArgs) Handles ListBox1.DrawItem
e.DrawBackground()
If e.Index > -1 Then
Dim brush As Brush = SystemBrushes.WindowText
If (e.State And DrawItemState.Selected) = DrawItemState.Selected Then
brush = SystemBrushes.HighlightText
End If
e.Graphics.DrawString(ListBox1.Items(e.Index), e.Font, brush, e.Bounds.Left + 20, e.Bounds.Top)
If e.Index = _MouseIndex Then
e.Graphics.DrawString("X", e.Font, brush, e.Bounds.Left + 2, e.Bounds.Top)
End If
End If
End Sub
Private Sub ListBox1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) Handles ListBox1.MouseDown
If _MouseIndex > -1 AndAlso ListBox1.IndexFromPoint(e.Location) = _MouseIndex AndAlso e.Location.X < 20 Then
Dim index As Integer = _MouseIndex
If MessageBox.Show("Do you want to delete this item?", "Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = DialogResult.Yes Then
ListBox1.Items.RemoveAt(index)
ListBox1.Invalidate()
End If
End If
End Sub
Private Sub ListBox1_MouseLeave(ByVal sender As Object, ByVal e As EventArgs) Handles ListBox1.MouseLeave
If _MouseIndex <> -1 Then
_MouseIndex = -1
ListBox1.Invalidate()
End If
End Sub
Private Sub ListBox1_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs) Handles ListBox1.MouseMove
Dim index As Integer = ListBox1.IndexFromPoint(e.Location)
If index <> _MouseIndex Then
_MouseIndex = index
ListBox1.Invalidate()
End If
End Sub
End Class
Refactor as needed.
Here is my code and I am able to add the text by defining some font properties but I want to add this using Font dialog.Can anyone help me regarding this issue.
Public Class Form1
Dim pic_font As New Font("Arial Black", 40, FontStyle.Regular, GraphicsUnit.Pixel)
Dim bm As Bitmap = New Bitmap(100, 100)
Dim strText As String = "Diver Dude"
Dim szText As New SizeF
Dim ptText As New Point(125, 125)
Dim ptsText() As PointF
Dim MovingOffset As PointF
Dim ptsTextPen As Pen = New Pen(Color.LightSteelBlue, 1)
Dim MouseMoving As Boolean
Dim MouseOver As Boolean
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
Me.SetStyle(ControlStyles.DoubleBuffer, True)
End Sub
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
PictureBox1.Hide()
bm = Image.FromFile(Application.StartupPath & "\DivePic.bmp")
szText = Me.CreateGraphics.MeasureString(strText, pic_font)
SetptsText()
ptsTextPen.DashStyle = DashStyle.Dot
End Sub
Private Sub Form1_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseDown
'Check if the pointer is over the Text
If IsMouseOverText(e.X - 10, e.Y - 10) Then
MouseMoving = True
'Determine the upper left corner point from where the mouse was clicked
MovingOffset.X = e.X - ptText.X
MovingOffset.Y = e.Y - ptText.Y
Else
MouseMoving = False
End If
End Sub
Private Sub Form1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseMove
'Check if the pointer is over the Text
If IsMouseOverText(e.X - 10, e.Y - 10) Then
If Not MouseOver Then
MouseOver = True
Me.Refresh()
End If
Else
If MouseOver Then
MouseOver = False
Me.Refresh()
End If
End If
If e.Button = Windows.Forms.MouseButtons.Left And MouseMoving Then
ptText.X = CInt(e.X - MovingOffset.X)
ptText.Y = CInt(e.Y - MovingOffset.Y)
Me.Refresh()
End If
End Sub
Private Sub Form1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseUp
MouseMoving = False
Me.Refresh()
End Sub
Public Function IsMouseOverText(ByVal X As Integer, ByVal Y As Integer) As Boolean
'Make a Graphics Path from the rotated ptsText.
Using gp As New GraphicsPath()
gp.AddPolygon(ptsText)
'Convert to Region.
Using TextRegion As New Region(gp)
'Is the point inside the region.
Return TextRegion.IsVisible(X, Y)
End Using
End Using
End Function
Dim tbm As Bitmap
Private Sub Form1_Paint(ByVal sender As Object, _
ByVal e As System.Windows.Forms.PaintEventArgs) _
Handles MyBase.Paint
tbm = CType(bm.Clone, Bitmap)
Dim g As Graphics = Graphics.FromImage(tbm)
Dim mx As Matrix = New Matrix
Dim gpathText As New GraphicsPath
Dim br As SolidBrush = New SolidBrush(Color.FromArgb(tbarTrans.Value, _
KryptonColorButton1.SelectedColor))
SetptsText()
'Smooth the Text
g.SmoothingMode = SmoothingMode.AntiAlias
'Make the GraphicsPath for the Text
Dim emsize As Single = Me.CreateGraphics.DpiY * pic_font.SizeInPoints / 72
gpathText.AddString(strText, pic_font.FontFamily, CInt(pic_font.Style), _
emsize, New RectangleF(ptText.X, ptText.Y, szText.Width, szText.Height), _
StringFormat.GenericDefault)
'Draw a copy of the image to the Graphics Object canvas
g.DrawImage(CType(bm.Clone, Bitmap), 0, 0)
'Rotate the Matrix at the center point
mx.RotateAt(tbarRotate.Value, _
New Point(ptText.X + (szText.Width / 2), ptText.Y + (szText.Height / 2)))
'Get the points for the rotated text bounds
mx.TransformPoints(ptsText)
'Transform the Graphics Object with the Matrix
g.Transform = mx
'Draw the Rotated Text
If chkAddOutline.Checked Then
Using pn As Pen = New Pen(Color.FromArgb(tbarTrans.Value, KryptonColorButton2.SelectedColor), 1)
g.DrawPath(pn, gpathText)
End Using
Else
g.FillPath(br, gpathText)
End If
If CheckBox2.Checked = True Then
Dim p As New Pen(Color.FromArgb(tbarTrans.Value, KryptonColorButton2.SelectedColor), 1)
'draw te hollow outlined text
g.DrawPath(p, gpathText)
'clear the path
gpathText.Reset()
Else
g.FillPath(br, gpathText)
End If
'Draw the box if the mouse is over the Text
If MouseOver Then
g.ResetTransform()
g.DrawPolygon(ptsTextPen, ptsText)
End If
'Draw the whole thing to the form
e.Graphics.DrawImage(tbm, 10, 10)
'tbm.Dispose()
g.Dispose()
mx.Dispose()
br.Dispose()
gpathText.Dispose()
End Sub
Private Sub TrackBar_Scroll(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles tbarRotate.Scroll, tbarTrans.Scroll
lblRotate.Text = tbarRotate.Value
lblOpacity.Text = tbarTrans.Value
Me.Refresh()
End Sub
Sub SetptsText()
'Create a point array of the Text Rectangle
ptsText = New PointF() { _
ptText, _
New Point(CInt(ptText.X + szText.Width), ptText.Y), _
New Point(CInt(ptText.X + szText.Width), CInt(ptText.Y + szText.Height)), _
New Point(ptText.X, CInt(ptText.Y + szText.Height)) _
}
End Sub
Private Sub chkAddOutline_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkAddOutline.CheckedChanged
Me.Refresh()
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If FontDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
End If
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
If OpenFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
PictureBox1.Image = Image.FromFile(OpenFileDialog1.FileName)
bm = Image.FromFile(OpenFileDialog1.FileName)
szText = Me.CreateGraphics.MeasureString(strText, pic_font)
SetptsText()
ptsTextPen.DashStyle = DashStyle.Dot
End If
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
tbm.Save(SaveFileDialog1.FileName)
End If
End Sub
End Class
What do you mean.If you mean open a font dialog and select a font from it,here is the code.
' You need Import System.Drawing before your class
' In your class vars section
Dim fd As New FontDialog
'later in your code
' This should be in the code where you call the font dialog
If(fd.ShowDialog() == DialogResults.Ok)
pic_font = fd.Font
End If