rectangle drawn on picturebox gets erased when i scroll image.i.e
i have made application for image cropping. on mouse down and mouse up event, an rectangle is drawn on picturebox using graphics.
1) now the problem is that when scroll image rectangle drawn on picturebox gets erased.
2)now i want resize this rectangle as per user's interest
how to resize the rectangle and drag the rectangle on picture box.
I've been using VB6 for a long time and finally my employer is giving me the signal to port my electronics cooling application over to .Net.One thing that I cannot figure out is refreshing a picturebox. My graphics consist of a lot of filled and empty rectangles.And I get various results, all of them not up to usefulness.Right now what is happening is when I draw on the picturebox and then show the form, I get the graphics. But if I min/max the form or move another form over it, the graphics get erased.The code is fairly basic:[code]...
View 8 RepliesI have application, where is a big image, displayed in picture box, but only a part of image is on the screen (I set display mode "zoom", so it's center). But now, I need to fluently scroll this image using mouse, so when I click on picture box, and move mouse, the visible part of image should be changing.
View 2 RepliesIn my application I need to draw several filled rectangles on a panel with a tiled background image. Depending on user actions, certain - not all - rectangles must be removed afterwards, revealing the background image again. Drawing and filling the rectangles is not so difficult, but how can I remove them in such a way that the background gets restored correctly?
View 2 RepliesSo; I've drawn this rectangle vb Dim zr As New Rectangle(100, 100, 100, 100)e.Graphics.DrawRectangle(Pens.Red, zr)
View 4 Repliesin my program were ever you click on a picturebox it draws a image, that works, but the picturebox it in a panel so that when the picturebox gets to big scroll bars appear, that works, but when i scroll down the picturebox and click it wont put a image exacly were i clicke, but if i did not scroll at all and click it works just fine.
View 11 RepliesI want to write a vb program to allow user to draw rectangle. User can click on a point as starting position and drag on the screen. A rectangle is drawn with the current mouse position and the starting position. The user then release the mouse as end position. When the rectangle is drawn, user can resize the rectangle by drag the border of the rectangle.
View 2 RepliesI created a form with a PictureBox. I created a drawing in the PictureBox. But I can't save the file to a specified folder without dialogue controls. Only through code.
View 1 RepliesI have a program where I use a picture box (pAudiogram) to display a template. Then I use Graphics (myLine) to plot things on this picture box. Some example code is below:
Dim myBluePen As New Pen(Color.Blue) : myBluePen.Width = 2
Dim myRedPen As New Pen(Color.Red) : myRedPen.Width = 2
Dim myLine As Graphics = pAudiogram.CreateGraphics
[code].....
I have an application that has a list of point and I can choose a tool and draw one image to different locations then remove them if I wish, and when I finish editing those images, I can then pick another tool . The images are supposed to go away that were drawn by e.graphics but they only do when I click in the picturebox. How can I hide the images or delete them from graphics when I choose another imageHere's the paint event alone
vb
Private Sub MapGrid_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MapGrid.Paint
[code].....
I am trying to draw a rectangle in a PictureBox (100 x 50)
Using gr As System.Drawing.Graphics = Picbox.CreateGraphics
Dim rect As New System.Drawing.Rectangle(10, 10, 80, 30)
gr.DrawRectangle(Drawing.Pens.Blue, rect)
End Using
From looking at the examples in my book, I "think" it should work, but alas, tis not working - nothing is drawn.
How can i draw a rectangle in picturebox using coordinate(X , Y) and size of rectangle from textbox?
View 7 RepliesThis code is used to demonstrate drawing a blue border around a picture box...(I've numbered the lines so I can refer to them below
1 Dim objGraphics As Graphics
2 objGraphics = Me.CreateGraphics
3 objGraphics.Clear(SystemColors.Control)
[code]....
Regarding line 1, the author says, "To instantiate an object in code, you create a variable that holds a reference to an instantiated object".!Regarding line 2, he says "the CreateGraphics method is pretty complicated, but for now, just know that it instantiates a new object that represents the client area of the current form".So now I have two new instances, the one from line 1 - an instance of a graphics object, and this one from line 2 representing the client area of the form.The rest of it is pretty clear; But Why can't I draw the rectangle around the picturebox itself? Why do I have to draw it around the "instance" of the picture box?
I have try many different methods but still no avail.how to do this? As i found a good tutorial over
here where it create a resizable rectangle on a form. But what i want is on a picturebox with image.
correct way to draw rectangles onto a picturebox, and also to explain the paint event more clearly.Basically I have an application where a picturebox contains an image, this image is a small computer monitor as such:
The idea of this part of my application is that the user can draw small window size rectangles which represent windows later on. I have already used some excellent code on this forum to be able to draw the rectangles on the picturebox (As pictured above), the rectangle outline is drawn from MouseDown and MouseUp respectivley.
The problem I am encountering is with the 'repainting' of this rectangle. I have included code to repaint the rectangle in the Paint event of the picturebox. This works when you move the picturebox 'off screen' and bring it back. However when the form is re-sized or other various things occur the rectangle is not re-drawn? even though the picturebox 'appears' to be clean and always there!
My code is below, it is not full and complete, but the few main subs listed should give an indication as to how I am currently creating the rectangle:
Private Sub picboxAdvDisplay_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles picboxAdvDisplay.MouseDown
'Set the flag for Drawing enabled
[code]....
1. What is the CORRECT way to draw a rectangle onto a Picturebox?
2. How do you code so that the rectangle is ALWAYS visible/drawn on a form re-size, minimise, window overlap etc etc.
Actually I'm creating a simple paint application in VB.Net 2010. I want to draw shapes in my application same as we do in Microsoft Paint using mouse.
I'm a bit successful also using mousedown and mouseup events of a picture box. The mousedown event sets the starting point and mouseup event sets the ending point(diagonally opposite point of rectangle.) The problem is "Nothing seems to be occuring between mousedown and mouseup events(Well..that is obvious because I didn't add any code on mousemove event). My question is: "Can I do something to see a growing rectangle during mousemove event?". The rest of the drawing should remain unaffected.
I have a form in which I draw a rectangle and a line depending on the button click. I basically want a dynamic line/ rectangle that moves when the mouse is clicked on another point on the picturebox. I found some code online for a rectangle, and I'm trying to extend it to draw a line too, but i'm having some issues. The line is not displayed when the mouse is lifted(mouse up event).
Here's my code:
Public Class Form1
Dim selection As Rectangle = Nothing
Dim m_Drawing As Boolean = False
Dim m_Start As Point
Dim square_click As Boolean = False
[Code] ......
' Show game directions.[code]...
I think this is actually really easy to do that it isn't documented on here or msdn.
I have a pictureBox on my form along with two buttons (Back and Forward) but I can not find a viable method of doing what I wish to do: Scrolling through images in a folder like the default Windows Picture Viewer does with Arrow Keys.Is there an efficient way to do this?
I'm using Visual Basic .NET with Visual Studio 2010, if that matters.
I have an picturebox and textarea in an panel I need to scroll the picture box image on keypress down arrow.
View 1 RepliesI have 1 panel and 1 picturebox and I want to scroll up/down picturebox with mouse wheel.
View 2 Replieshi there, i have a problem with my picture box which has the facility to zoom and pan with scroll bars, when i zoom in on the image then move the scroll bar down and leave it there and then click my 100% zoom button, the image is only just showing at the bottom of the screen and it is movable so you have to drag it into position when you shouldnt need to because it was fixed.
View 11 Repliesi want to add a new floating rectangle with an image inside it to my form when i click on a button control and then use a timer control to move it in a straight line across the Form. the problems I'm having are:
1) Drawing and filling the RectangleF on the screen.
2) Animating/moving it from X1,Y1 to X2,Y2
3) Triggering the Drawing and movement with a Button Control
I have a picture box in my form and now I want to add an event so that if the mouse is scrolled up the scale of the picture box gets larger and when the user scrolls down the size off the picture box gets smaller. This way I want to make a zoom in and out effect.So now i have the following code in the mouse wheel event of the Picture box:
If
e
.
Delta
>
[code]...
But somehow this whole mouse wheel event isn't fired.
I have a picturebox inside a panel, the picturebox is long, and the panel is set to allow scrollbars, which it adds. I can scroll the picture at design and runtime, but how do you scroll it programmatically?
Starting with the picture box with the top set to 0, and then doing this... (using any non-zero value as the lY value)
Dim newLocation As New System.Drawing.Point(0, -lY)
[Code]....
So how do i get the value to change (e.g. to scroll the picturebox!)
I drew an image in a picturebox with the image height as picturebox height and image width as picturebox width. The image is placed somewhere on the center of the picturebox. My intention is to scale the image to fit to the picturebox.
View 2 RepliesI am currently working on image cropping software. Any idea how to make image under rectangle to be clear and outside area translucent?
View 5 RepliesI using vb6.0.I want to load a image into a picture box and resize it in runtime through mouse.Image type is jpg or png.my logic is,
1. load image[jpg or png ] into picture box and draw a rectangle using rectangle API, according to image size.
2. resize rectangle through mouse and according to the size of rectangle change size of image.
I have a program I'm working on that, for one of the features, allows the user to drag an image from a picturebox, into the main form space, anywhere they want. [code]...
When trying to drag the image from the CurrentTilePicBox, the very moment I move the mouse while dragging the cursor becomes a circle with a cross and won't drag and drop into the new picturebox.
i'm doing a simple form tat could add picturebox during runtime and i could add several picture into it.
View 5 Replies