Currently I have not found a way to generate an event when a user clicks on a line that is drawn in my workspace area. The line that is drawn is created by calling the function e.Graphics.Drawline(Connector,X1,Y1,X2,Y2), where Connector is a System.Drawing.Pen object and X1,Y1,X2,Y2 are integer coordinates of the two points to draw the line between. I have not found any events such as Click that are associated with the line that I can use. Do I need to create a custom event for these lines if so how do I go about this?
I am using this code to draw a line on a form using textboxes as the x and y coordinates. I then click the button with the code below that will draw the line.
Before the new line is drawn, I would like to have previous lines deleted first.
How can I delete these lines?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim canvas As New ShapeContainer
I want to draw lines (paths) for AI to follow. I need to know the X,Y coordinates of each pixel in the line.Lines drawn straight vertical (0 or 180 Degs), diagonal (45 or 225 Degs), or horizontal (90 or 270 Degs) are easy to map.I need to know how to map straight lines that are not one of the those three. Like 1 degree to 44 degrees, 46 degrees to 89 degrees, and so on...
I'm creating a type of drawing program. The user can draw a line, much like in word or paint, etc. But once the line is drawn (to a picturebox or bitmap in memory), I want the user to be able to click on the line and drag it around (translate it).
If I know the coordinates of the endpoints of the line, as well as the pen width it was drawn with, how can I tell if a certain coordinate (mouse location) is contained by the line?
My first thought was to take a mathematical approach, like get an equation for a line, and check to see if the coordinate belonged to it. But for a higher pen width, the line is thicker, and thus contains more points.
How can I tell what coordinates are part of the line? Is there some sort of intersect function in the gdi that takes a line?
I have drawn (3) lines on a panel, each a diff color. I want user to muse click on a given line to bring up a label that will explane what the line is telling the user. There s/b no bit maps involved. I am using graphics to draw the panels and lines.
Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load End Sub
[code]....
My code above will draw the line but i can not see how to use path to get a "hit" on mouse move for the line?I use private routines to draw many panels and assign pens to colors and panels. I must be able to connect panel and line ID to pen name to know the nature of the line to label it! I can see that path must be used; but how?
Does anyone know how to create a custom start and end cap for a line drawn with System.Drawing.Pen? I wanted to use a custom start and end cap that I have from an image that I created that contains two arrows pointing in the same direction one after the other.[code]...
I need to draw several line-graphics on a form, then select and drag individual graphics to new locations. Is it possible for example to give each graphic path an identity when drawn, then select any one (via mousedown, whatever) and link it to the dragged mouse co-ordinates until released? MS Visio has exactly this ability - can it be done in .NET?
Private Sub frmGraphTT_MouseHover(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.MouseHover
sender = ChartBox Dim XYpoint As Point XYpoint.X = MousePosition.X[code].....
I have a form with a picturebox called Chartbox and I'm trying to fire a mousehover event when the mouse is over a drawn region (Cregion). My code (see above) is not working.
Usually I code C# in VS10, but I have to code a small program in VB.NET in VS10.And I am used to selecting something with code-assist with Enter, but now in VB Enter also make a new line, witch is very annoying because I can't help doing that all the time. How can i turn this off/on so it's like when I code C#? I have looked, but could not find anything.
I have a bound datagridview containing 4 columns. All I want to do is click on a row and then assign the value for each column to other controls (in this case textboxes). My problem is, I'm not sure which Event to use. I don't know how many events I've tried the code below in several different events but none of them are working.[code]
I wanted to select the entire line/row in the RichTextBox, where currently the cursor is. How should I do it ?The code should be paste in command button 'cmdSelect'
I have a textbox in a tab control and iv'e coded the textbox_leave event to show a msgbox and reselect the textbox if the text doesn't meet certain conditions.
Private Sub TextBoxChaseTime_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBoxChaseTime.Leave If IsDate(Me.TextBoxChaseTime.Text) Then Me.TextBoxChaseTime.Text = Format(CDate(Me.TextBoxChaseTime.Text), "hh:mm")[code]..... (Reselecting the textbox is the only way i can find to efectively cancel the leave event - is there another)
I've also added a line to also reselect the tabpage incase the textbox_leave event was triggered by selecting a different tab in the tabcontol.However, when the textbox_leave event is triggered by the user selecting a different tab the textbox_leave event seems to be triggered several times displaying the msgbox four times.why this is, but it seems to be caused by the by the line that reselects the tabcontrolhow to stop the msgbox being shown more than once Interestingly, if i add a line to change the text in the text box to meet the conditions the msgbox is only shown once, but the tabpage is not reselcted
The following code (VB 2008 .NET 3.5) failes to move focus to the combo box. How can do it?
Private Sub TabControl1_Selecting(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TabControlCancelEventArgs) Handles TabControl1.Selecting If cbOrderType.SelectedIndex = 0 Then
I have a datagridview and some code that will seek out the appropriate row and select it programmatic.
For intIndex As Integer = 0 To ofrmMasterList.dgvMasterList.Rows.Count - 1 If ofrmMasterList.dgvMasterList.Rows(intIndex).Cells(0).Value = strMasterID Then ofrmMasterList.dgvMasterList.Rows(intIndex).Selected = True
[Code].....
The above code works like a charm, except that my selecting of the right row does not fire the datagridview 'selectionchanged' event like it would normally do if I just clicked on it manually.
what I need to do to get the grid to fire off this event after selecting a row with code instead of a mouse click?
take a shot from a camera every last day of the month at midnight. I know how to to take the shot, but I don't know how to generate an event repetitively after a time period. I thought about to calculate the time between now and the next shot time, but how to run a method after a time period?
I am currently using Snarl to generate notifications whenever an event / error occurs in my program. How would I go about coding a native VB notification instead of using a 3rd party program?
I have been trying to figure out how to do this program for a few days. Here is the question.Write a Windows application that allows the user to enter a seven-letter combination corresponding to that number in a multiple line TextBox when the user clicks the Generate Words button.Avoid phone numbers with the digits 0&1.
I got some help from my instructor but I can't get anything in the listbox?
all this in datalist as you can see so it will be repeated..i have put one image in it now i want call a method when any image will be clicked i make one sub called s() in vb i want to call it i use on clientclick() event but doesn't work
Ok, so I`ve been studying a bit of VB lately.. bought a few books and read lot`s of articles and seen hours of instructional videos, and I slightly start to get the hang of a few things.. :) I`ve recently started a fun little project, but I seem to lack a bit of knowledge to reach my goal. I`ll first try to describe my project:
I've used the developerfusion C# to VB conversion tool to convert Brad Smith's ComboTreeBox project and I'm having troubles on, as is fairly normal for me and C#-to-VB conversions, an event handler.
In the interface implementation for IList(Of ComboTreeNode).Item there is this C# code:
#region IList<ComboTreeNode> Members public ComboTreeNode this[int index] { get {
[Code]....
I'm getting errors on the last two lines of the Set method and frankly I don't understand what's even being done, there. It appears, from my limited C# events knowledge, to be adding an event handler back onto the event itself, which leaves me completely lost.
Doing a naive conversion to AddHandler value.Nodes.CollectionChanged, AddressOf CollectionChanged just brings up a reminder that the second argument of AddHandler needs to be a method address.
I'm writting program in VB 2010, but I have a problem. I want to draw a temporary line on PictureBox control MouseMove event. That works fine but deleting of that line doesn't work. I tried to draw the white line on the same coordinates (PictureBox's background is white), but won't work.
Here is the code: Private Sub drawing_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles drawing.MouseMove
In a application i'm working on i need to be able to select a graphic (a line to be specific) and then i need to change or move it but i cant find how to add a click event to the line when a draw it. Basicly i want to click on the line to select it (make it fatter or an other color) and then be able to alter it in position and size (lenght). Is there any way or what is the correct way to do this?
How can I do some code when the user changes what line the caret is on? So something like: sub textbox1_lineindexchanged (byval ....) Handles Textbox1.Lineindexchanged 'do code based on the current line end sub I am using a richtextbox, just I always used it so I just call it a textbox.
I have several multi-line textboxes that I want to lose focus (i.e. when the user presses the right arrow key) but the control wil not relinquish the focus.Simply put, I first verify if the selection start is at the end of the text, if it is, and the user presses the arrow key, it should move to the next textbox. some debug.print code placed in strategic locations indicates that the target textbox gets focus and immediately loses it and the source textbox gains focus once again. Essentially not allowing the textbox to lose focus.
Select Case Case Keys.Right tbRight.Focus()
[code]....
After changing the source textbox multi-line property to false, it behaves as expected. Is this a "feature" .. surely I don't have to resort to "SendKeys"
what i need to do is open a txt file, read line by line, decode each line into an array and display. Now all works ok apart from one line.
sTextLine = objReader.ReadLine() <-- Value of string cannot be converted.
full code here ------------- Dim objReader As New System.IO.StreamReader(sOpenFile.Text) Dim sTextLine As New ArrayList() Dim sText As String = "" Dim i As Integer = 0
I draw some graphics on a picture box. However, I want to change the width and height of the picture box so that the drawn graphics fit exactly in the picture box (during run time, where graphics may change). How can I do this, or how can I get the region of the drawn graphics so that I can change the width and the height of the picture box manually.
