I try to implement undo in drawing program I want to save the bitmap after every drawing and push it to stack then when the user click the button it will change the image to the last bitmap saved in the stack here is my code
Private Sub PictureBox1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseUp
Xend = e.X
Yend = e.Y
[code]....
I want to implement copy, cut and paste in my drawing program (copy part of an image that is selected)I don't know how to start?
View 10 Replieshow to implement undo/redo in an application? I've searched the web, and most I found don't work properly or just clear the textbox.
View 9 Repliesbasically add and remove text and selection information from a stack. Result: When using Undo/Redo the selection got messed up, the text moved, sometimes causing lag of epic proportions. I need a way of having complete and smooth undo/redo class for storing all information I would possible need.How to know whether or not to add an undo stack is easy, I just checked if the user clicked in the text or moved using the arrow keys. As soon a previous marking was given for "next text change needs to be backed up", it was backed up. At that point I stored the RTF and selection start/length. What do I have to store of a RichTextbox control to be able to restore it to a previous state, and how can I reset it back to a previous state? See it as having a "RichTextBoxState" class:
Public Class RichTextBoxState
Sub New(ByVal RTB As RichTextBox)
Me.text = RTB.RTF
Me.selectionstart = RTB.SelectionStart
[code]....
After restoring it must display the EXACT same thing as when it was saved as a state.
i have written code for undo and redo operations code for undo operation
[Code]...
now when i rotate the picture then tries to undo the image then this erorr comes Stack is Empty and program closes.
I want to put undo in a small program
View 10 RepliesIm looking to make an advanced drawing program in vb.net as a bit of a project to occupy my time.im looking to make one pretty much like Paint but with gradients and other features, but im at a loss as to where to find such a tutorial.
View 3 RepliesI'm using using System.Graphics for my latest project (A simple 2D application). Problem is, it gets a horrible FPS and I'm only drawing 8x8 tiles (usually 10-12 is enough to bring it down to 12FPS).
A friend of mine suggested that I use DirectX. He also suggested XNA but I opposed because I don't want my clients to have to install the XNA distributional. DirectX is common enough (to my knowledge) and I can just include the dll's if I need to.
So, my search began. I've been looking only for DirectX 2D tutorials for VB.net. I've had no solid success thus far. In truth, all I need to do is be able to draw bitmap x at position pos.
I've been using System.Graphics and a hacked up bitmap as my buffer thus far so I'll go for any improvement that I can get.
I'm using VB.net so I'll be ok if you give my one for C#, I'm pretty good at being able to read it (and I have a nice converter too). I would just prefer VB.net to save time.
I am trying to implement a timer in my program and i am unable to do so till now.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Static intCount As Integer
intCount = 10
While intCount <> 0
Dim fileReader As String
[Code] .....
How do I implement a timer that will close the IE after every 5 seconds till the count runs out?
I'm trying to implement a timer into my program, because I want to take a capture from a webcamdevice every x seconds.I've wandered around google all day and tried to implement all kind of timer classes (with system.threading because I can't use system.windows.forms.timer) but I won't figure it out!
View 14 RepliesI have an existing program, and it uses DLL files to do things I wish to implement a DLL in VB.NET the DLL's are not COM, they are standard call the method or function type DLL's
How would I implement the following in a VB.NET DLL extern "C" void __Export_TYPE HelloWorld(char *path)
I have the following function that loops through a directory and checks for a specified folder and file[code]...
View 1 RepliesI use VB.NET 2005 i need to implemente IMessageFilter for MSWord object.
View 8 RepliesI have an interface program written in VB .Net (VS2008xxx.dll). Is it possible to implement the Interface in a VB6 program (VB6xxx.exe)?
View 8 RepliesI'm looking to implement a sort function in my program however I am new to VB and don't know how to. Basically I have 6 objects in my program racing across the screen and what I would like is a leaderboard showing the current top 3.
View 13 RepliesI am trying to implement a service object class for the POS for .NET library using VB9. Specifically, the BillDispenser class. I define my class and inherit from Microsoft.PointOfService.BillDispenser. As normal, it creates stubs for all the MustOverride (abstract) properties and methods that I need to override (I love that), EXCEPT for the events. Apparently thare two events defined as abstract (MustOverride) in the POSCommon base class, but VB doesn't generate stubs for them.[code]...
View 8 RepliesI'd like to implement some very simple validation into a program I'm writing, but I have no experience in this area, so I'm not sure how to implement it.I'd like one to have one make sure that text entered in to a text box has only regular characters (A-Z, a-z), but I'm not sure how to go about it!
View 3 RepliesI want to implement copy, cut and paste in my drawing program (copy part of an image that is selected) I don't know how to start
View 5 RepliesI want to implement drag and drop functionality in my program, but it isn't working. Here's the
vb.net
'I removed the code because it wasn't needed anymore ;)
I've set the AllowDrop property to true, and when I drag a file onto a program, the cursor changes to Unavailable, and I can't drop my file.
I'm trying to implement printing functionality into a simple program for my company. It's not necessary, but it would be a nice finishing touch for everyone. And really, in practice, my printing feature works. My problem is that each line is printed on a separate page of paper and I can't find a way to just like, print a page.
It doesn't have to be fancy. I know that I won't need word wrap, nor will anyone ever print more than one page. Here's my ginked & modified code thus far:
Private Sub PrintDocument1_PrintPage(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage
Dim linesPerPage As Single = 0
[Code].....
I want to implement the TCP KeepAlive in order to check dropped connections by running a timer.
In my case, I have a TCP Client (using socket class) and a third party server (i have no control on it).
How can i use the TCP KeepAlive on my TCP Client in order to check the connection state?[code]...
I want to write a program that can control port communication in a PC by blocking certain port based on the admins request and also monitor incoming and outgoing network traffic. Can i achieve this using vb.net winsock?
View 1 RepliesI'm a newbie in visual basic. We have a project in our school in implementing queue using circular array.
View 5 Repliesdraw individual pixels, without resorting to drawing a line and setting it's length to 1. Is there an actual ability to draw a pixel that is just 1 pixel big?
View 2 RepliesI need some code to draw a resizable, draggable rectangular cursor (or selection box) on a picturebox. I found some excellent code (albeit rather old) that does just that, but on a form rather than a picturebox. I have tried converting the code - basically moving things to the picturebox events (Paint, MouseDown, MouseMove etc). It nearly works but leaves a trail behind it when you move or resize the cursor. In other words, the selection rectangle is not being erased before being drawn in the new position.
Is there some fundamental difference between drawing graphics on a form and drawing on a picturebox that would cause this behaviour? Something like, when you invalidate a form and cause a redraw it erases what you did last? If not, then I just need to dig a bit further and work out how the cursor is being erased from the previous position.
Here's the original code that works fine on a form:
Private DragRect As New RectangleF(20, 20, 100, 80)
Private Adornments(7) As RectangleF
Private MouseInRect As Boolean = False
[Code]....
Say I have 3 Buttons, labelled: Unit 1, Unit 2 and Unit 3. When I click on any button I want a drawing of that unit to appear on screen at a pre-specified starting point. Thereafter when I press any other one of the buttons the unit drawings appear alongside each other in a line. So I could end up with:
[Code]...
With this line...
If PictureBox1.Image = My.Resources._2star Then
I get this error: Operator '=' is not defined for types 'System.Drawing.Image' and 'System.Drawing.Bitmap'.Is there another way to say = with images?
Is it possible to convert an object form System.Drawing.Graphics to System.Drawing.Image?
View 4 RepliesHere is my favicon code
Dim oURL As Uri = New Uri(e.Uri.AbsoluteUri)
Dim favicon As Image
If oURL.HostNameType = UriHostNameType.Dns Then
[code]....
The error is Value of type System.Drawing.Image cannot be converted to System.Drawing.Icon Is it even possible to make the favicon be the icon of the form?
How to Undo changes in a form?
View 7 Replies
