Zoom In A Picture Box But Keep It Centred On A Point?
Sep 10, 2010
I'm using VS2010 and I've set up a form with a picturebox inside a panel and have zoom working via the mousewheel. The user can also pan by clicking and dragging the mouse. So all good so far. But I've struck a problem.
When I zoom it is anchored on the top left of the image.
What I would like to be able to do is have the user click a point and zoom on that point, or at worst a simple zoom on the center of what is displayed in the picture box.
i have a picturebox which displays a map i have 2 modes add point and delete point when the user clicks the picture it creates a point on the picture where the user has clicked that works perfectly its when i try and delete the point when it doesent work :/ i have all the points loading from an xml file this is the code i have:
[Code]...
basicly i want it to when the user clicks the point it fines the x any y in the xml delete the node then delete all the points on the map then reload them all according to the xml
i have a picture box which is display image from database.right now i'm having a problem of zooming an image.
cmd.CommandText = "Select sketch from diagram where ReportNumber = " & reportnumber(i) & " " cmd.CommandType = CommandType.Text Dim d As New MySqlDataAdapter(cmd)
zoom in on an image within my picturebox. i have tried several lots of links. i had one that worked but yet when you zoom in on image its terribly distorted. my picturebox is called picturebox1. basically i have created a zoom button called (btnzoom) i would like for the user to click the zoom button and each click there is the more it zooms in.
[code]when I multiply trkZoom.Value by anything I am getting unwanted results (x * trkZoom.Value). x = 20 varies sizes...x = 100 cannot downsize the image. What am I doing wrong to get this to increase or decrease x5?
Ive been hacking away at this portion of a project for some time and I have a Picbox in a panel, I can, Draw on the image no problem, I can pan and then draw on the image, no problem. How ever when I zoom in out out on the image I can no longer draw on the zoomed image. How ever if I try and draw then zoom again, the lines will show up, but in the wrong places
I would like to have a picture box, that contains something.. This then can be zoomed in on.. Moved around.. ect. What's the best, most effective way of doing this?
So I've got a picture box and I want to load up all kinds of pictures programmatically , with unknown dimensions. So I pick sizemode Zoom to ensure that the image isn't distorted and I can see all the image. However if the image width is greater than height it vertically centres the image in the PictureBox control's bounds, leaving a gap at the top and bottom.
What I'd like is for the picture to be alighned to the top of the control in this scenario. So the picture will be immediately below a control above it.
Is there any way of acheiving this? Perhaps by over-riding paint event ?
Oh PS: The Picture box is docked to 'fill', otherwise I'd just change it's dimensions in code to have the same aspect ratio as the image.
I Have a picture box on my project, but the picture that I have is larger than the box and I want to keep the SizeMode normal so How do I put scroll bars on my pictue box.
Also I would like to be abe to zoom in and out on the picture how would I do this?
I am trying to perform Zoom and Pan the image in Picture box using the following The Width and Height of the picturebox is (1024,1024).
Private Sub Picturebox1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Picturebox1.Paint If Mouse_Operation = "ZOOM" then ZoomWidth = 1024 * Total_Zoom_value ZoomHeight = 1024 * Total_Zoom_value
[code]....
Total_Zoom_Value and (imgx, imgy) are calculated based on the mouse movements on the picturebox.Now I am able to do the PAN operation after Zoom operation. But If i try to do Zoom operation after PAN operation, I am not able to Zoom the image from the PAN co-ordinates (imgx, imgy). I am not getting how to retain the image drawn using e.graphics.drawimage.how to do the operations on e.graphics.drawimage.
How can I zoom in/zoom out screen display? This is to be used for people having eyesight problem. I want to control the screen resolution by percent and not to any fixed size provided in control panel/display settings.I have to control the output of the main display and zoom in/zoom out by percent, according to user's eyesight matching
I created a Zoom in and Zoom out function for my application and it works great. I would just like your opion on my code, because I am wondering if it can be done a bit neater and more effective.
ts = ToolStrip cms = ContextMenuStrip vb.net If Me.Font.Size < 30 Then
[Code]...
Me.form.font changes the font of all the controls except toolstrips, contextmenu's and menustrips.
Any idea's if this can be done any neater or how you can make menustrip etc.. use the font of the form?
Edit:This is the Zoom In version btw. The Zoom out is identical except it uses - instead of + when declaring the newFontSize.
I hve been working with points a lot recently, and I have been wondering if there is a way to set a point without setting point.x and point.y separately. For example for (3, 5): Point1 = (3, 5) But that isn't right
i have map of a State, i need to let the user to Zoom in amd Zoom out and show some buttons on the Picture if we zoomin or zoomout the buttons also will be moved according to the location like google map how to achive this?
I have a Diagonal line drawn on a picture box on my forum and i need to know if the user has clicked the line I have the Start point and End Point of the Line and the mouse x,y location So i basically need to find out if the x,y of the mouse is on the line.
I'm trying to extract a piece of text from within the string, defining both a starting point and an ending point. For instance, say I want to search for the text found between "That is a " and " car" in the string "That is a red car", so it would return "red".I know you can use .SelectionStart and SelectionLength, but the length of the word can change, so the selection length can vary. What I want is to establish a specific starting point and a specific ending point from which to extract the text from the string.
I'm trying to calculate the direction between two points on a two-dimensional grid. Actually I want to determine if that vector is within a range of two values. Suppose the grid's origin is 0,0 at the upper left corner, and 0 degrees represents north. I have a point A on that grid. I want to know if a line from point A to point B on the grid is within a range of directions between 111.8 degrees (a little south of east) and 158.2 (a little east of south). Those are approximations; the 111.8 is 90 degrees plus the arctangent of 2/5, and 158.2 is 180 minus that value. I worked out a series of calculations worthy of a medieval astronomer, but I suspect there is a simpler way. I'm going to have to do this for a variety of other vectors, and I'd like to generalize
I know how I can construct an icon setting point by point, but that isn't what I want. I want to use a bitmap file or a jpeg -is easy to convert an jpeg to an bitmap- and built an icon that looks like this picture.
I want to make a drawing application which needs a few drawing functions I cant handle myself as im not very mathematicly inclined The first on the list of functions is to create an arc from a start point, end point and radius. The method signature is as followes.
Function CreateArc(byval StartPoint as PointF, EndPoint as PointF, Raduis as single) As PointF() 'Code to create an array of points...
I have a DataGridView that will occasionally have a RowError icon displayed in the RowHeader (shown below)I have code that displays a small form when the users mouse moves over the row header or clicks the row header.I would like to draw aline from the top-left of the form to the middle-right of the row header.I basically want to point from the form to the error icon.
I need to move an ellipse from a known point on the screen to another known point on the screen.
I've tried using For.....Loops with less than desired results.
I can't remember everything I've tried, a lot of trial and error has been layed to waste. Lol
I've ended up with this code after putting together what I've tried, what I've learned elsewhere, and a couple of posts I've read on here.
All I want to do is move the ellipse from one point to the other along a straight line that forms the angle between the two points (X1,Y1) and (X2,Y2), make it grow from 2 pixels at it's start, to about 80 pixels by the time it reaches half way, then shrink from 80 pixels back down to 2 pixels by the time it reaches the point (X2,Y2).
Easier said than done.
Here's what I have at the present.....
Dim W As Integer Dim H As Integer Dim Num As Integer
[Code].....
....This seems like such a simple task, yet it's been a week since I came up with the idea, and I've had little success.
