I would like to build a line chart which can redraw or change during a period of time with dynamic data. So that the x, y axis will change if out of range. The graph may be somehow similar to Matlab. I am using vs2005.
View 2 RepliesI am need to drag drop listboxes with connection line in vb.net. If the listbox move then connection line should also move. I have attached picture as wel
View 1 RepliesProblem drawing dotted path lines, with even dots along the path line.I want to draw a path line that can be any shape (square, round, outline etc), and along this path line I want even dots to appear.
I also want to be able to resize the shape (as in the example attached)This is very easy to do using "DrawPath" and defining points for the path and using a pen defined as dots.The problem I have is I want the dots to be evenly placed along the path, on any shape or size I draw.In the example I have created, I create a square with 4 points and draw a dotted path.There are 2 buttons that allows me to resize the square (larger or smaller) this helps show the problem more clearly.
The path starts at the top left corner and finishes back at the top left corner, the dots are evenly placed along the path, except the final dots at the end of the path. (Sometimes the dots are even and other times they are not even).The shapes I want to draw can be any size and any shape, but I have used a square in this example to show the problem I have. point me in the direction I need to go that allows me to draw the dots and give the impression that they are even all along the path, for all shapes and sizes.
In the pictures below if you change the size of the shape, one will have even looking dots, the other will not.
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drawing text on a window which is not the current form's window.I remember doing this in Win32 api with getwindowdc(handle) to obtain a DC for the Window, then textout() on the DC.
View 2 RepliesI would like to include a bar chart in my program. My present tool box does not have that control. how I can include that control in my tool box.
View 2 RepliesI'm using the MS Charting control, and can't find the way to create the translucent effect shown in their example piccy[url]...
Notice how the pie chart is translucent. How is this done with the chart control on a winform?
I am drawing a bunch of shapes on a form and I want to relegate some of these to a subroutine other than Form1_Paint().The form has the DoubleBuffered property set to TRUE.All the shapes that are drawn by an external sub get overwritten:Code:
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I have several picture boxes on a form (frmMain).My question is, how do I paint a point on a particular picture box at the location specified by the coordinates of the current mouse position? The snippet below shows defining some canvases and pens. But I'm not sure how to capture the mouse position when the mouse is over a particular picture box and how to paint the actual point at that location.[code]
View 3 RepliesIGraphics and drawing and invalidating thing.I have improved, that I can tell. I won't explain everything, so here's the essential:Technically, my application will let you draw a rectangle on the form. You click, drag, and boom, a red rectangle is there. This rectangle will disappear when you start drawing another.I got that working.But my problem is performance. You see, obviously I have to update, invalidate and paint my rectangle every time the mouse moves while it is in "drawing mode". I do that every time the mouse's position changes.And that is quite a big deal. Every time the mouse's position changes? That's a lot of invalidations and redraws for a decently-sized rectangle!I thought of skipping some mouse movement, like only update every 5 coordinates moved or something. But that would render my goal quite inaccurate.I already invalidate only the regions necessary, that I can tell.
View 5 RepliesI'm trying to make a custom combobox from scratch that multiple instances will share the listbox that holds the data on. I'm trying to draw the button face manually using GraphicsPaths and pens and brushes, but I'm having a few issues with it:
1. How do you draw that down arrow glyph in a way that doesn't look like a two-year-old sneezed on it? I'm having problems with the shape looking like the traditional one.
2. How do you position the listbox that contains the data in such a way that isn't bound by the containing form's render window?
3. I've tried to make the background look different when it has focus, but the OnPaint seems to think it always has focus and always makes the background the "focused control" background.
Im using VB 2005 express edition. Im trying to draw rubber band lines and rectangles using controls like buttons in one form. My problem is, i did the rubberband lines and rectangles on diff forms.Here's the snippet code for rubberband rectangle:
Code:
Private Sub MyDrawReversibleRectangle(ByVal p1 As Point, ByVal p2 As Point, ByVal dashed As Boolean)
[code].....
Well im just upgrading from VB6 and i was able to paint images to the background of a form. The same method does not seem to work in VB 2008. Is there a way i can draw/paint images to the background of my form?
View 7 RepliesI'm just getting started, and it's as simple as that: I need guidance to draw a rectangle or place a dot or a point on Form1, in VB 2008 Express. I knew how in VB6 -- let's build on that.
View 3 RepliesI am drawing a circle, of let's say 300 pixels diameter. I want to draw a triangle, with the top of it being at New Point(diameter / 2, 0). How could I get the other 2 points of the triangle? If possible, how could i get the 3 points of a triangle rotated by x degrees?
View 1 RepliesProblem1: I have a picturebox on a form. I have also managed to draw several PNG files with transparency onto the picturebox (see below). However, If I move the form outside the border and move it back, the image is gone. My source so far:
Dim k1 As New Bitmap(My.Resources.image1)
Dim k2 As New Bitmap(My.Resources.image2)
Dim drawMe As Graphics = PictureBox1.CreateGraphics
Dim bgcolor As Color = Color.FromArgb(128, 128, 128)
drawMe.Clear(bgcolor)
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I created an application in VS2005 that draws text with a custom font and color. The images look great from my XP machine. But from another machine running Windows Vista, the graphics are messed up. It seems that the transparencies inherit the default black background so there's this gray'ish/black haze around the text...
View 1 RepliesI'm having a problem with the graphics portion of vb.net. As a school assignment, we are making "turtle graphics" applications. I have mine working perfectly, the problem that we are having (not even the teacher can fix it) is that when the window gets sent the command to be painted (ie minimized and maximized) the drawings in the picturebox I am using are completely erased. I am looking for a way to prevent this from happening. I have been trying to store the image as a bitmap in memory, which does not work. Is there another way to draw to a bitmap/image in memory and then output that to a picturebox?
View 2 RepliesI know how to do a simple graph on VS.I have a value in a textbox wich is updated every second and I need the chart to display that value on the chart every second with the last 5 values or so.
View 3 RepliesIf I try to draw a circle by using e.g.
Code:
e.Graphics.DrawEllipse(Pens.Red, 50.133, 100.321, 0.1, 0.1)
I will get an error message. I tried something like
Code:
Public ObjectPoint As PointF
Dim cpoint As New PointF()
cpoint.ObjectPoint = New PointF(startX, startY)
e.Graphics.DrawEllipse(Pens.Blue, cpoint.ObjectPoint, 0.4, 0.4)
but it didn't work for the location and the circle size. How to draw a circle(and rectangle) by using floating point numbers?
I am doing a project with graph (VB.NET). I am drawing a line handling dynamic property ( opacity changes based on DB value). I don't know how to change the opacity.
View 1 RepliesHow would you add a Dynamic Contextmenustrip to your form and how would you add the items to the contextmenustrip. Also when adding the items to the menustrip is it possible to give them names and text dynamically if so how?
View 5 Repliesi need plenty of textboxes in my program..i have already succeeded to create them easily
for y=1 to 9
for x=1 to 9
Dim square As New TextBox
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Is the ContextMenu control strictly to offer choices when the user right-clicks some object, or can it be used to offer choices in general?
In my situation, when a user opens a certain type of file, I want to offer a selection of specific subfiles (line ranges) within said file as choices. The presence of subfiles and their number is variable, so this would be a dynamic situation. (No subfiles: use the whole file; three subfiles: present three choices ...)Would ContextMenu be appropriate, or should I offer a list box or combo box or frame of radio buttons instead?
can we apply tone mapping algorithms in vb 2005?
View 1 Repliesmy interface is like this, i've put 4 text boxes above, followed by a Generate Button in the middle and a multiline text box below the Generate button (please see the attachment)
so all i want is when i click the Generate Button, i want the data entered inside the above 4 text boxes to display in the multiline text box at the bottom in 4 seperate lines and not in 1 row. Also i would like to have some line spaces.
this is the code i used
Code:
' This is used to display in Bold
OutputTextBox.Text = "" & TextBox1.Text & ""
' This is used to display TextBox2.Text
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Just wondering, is it possible to put some tabs above the big multiline text box at the bottom, say like 4 tabs and each tab consists of a big multiline text box inside it. And then when clicked the Generate Button which displays different data ...
I'm trying to rotate a mirror, which I represented by a line across a specific point. I translated the point of rotation to the center, rotated by an angle indicated in a text box and then translated it back to its original position.
Here is my code :
Quote:
HTML Code:
Dim theta As Single
Private Cntr_X_blu_Mirror As Single = 5
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I hope the code is good. The problem I encountered is that the line becomes smaller and smaller as I rotate it. and that's bad! Sometimes it even grows longer [I think when I rotate it in the oposite direction!]
Also, when I rotate it at 90 degrees, the rotation does not resembles a 90 degree rotation. It seems to be inclined at 45 degrees instead!
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?
View 6 Repliesinsert images in a combobox. I understood the code, but what I'm asking is how do I add multiple images per line of the combobox?? I mean the way, the smileys are displayed in dropdown grid in Yahoo! messenger or the sort when you click on the smiley button..
I'm using Microsoft Visual Basic 2008 Express Edition with .NET Framework 3.5
I'm making a custom class that mocks the System.Drawing.Rectangle class because the Rectangle class doesn't have a name property. I need a name property because I am adding all of my rectangles to a collection and I need a little more info stored than just their locale and size. So I changed the _onPaint event but nothing is working out when I run the program?
Public Class Rectanglar : Inherits UserControl
Public BackgroundColor As Color = Color.Blue
Public Sub New(ByVal name As String, ByVal XY As Point, ByVal Widthy As Integer, ByVal Heighty As Integer)
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I look at hundreds of VB.Net user interfaces through the internet and they all look horribly unsophisticated from a graphics point-of-view.Compare this to the backgrounds seen on tv broadcast that use blurred line gradients to create graphics that have some interesting appeal and draw the eye to them (at least my eye).I've attached some sample screenshot grabs below that I have annotated with magenta rects showing the interesting sections.What types of graphics routines can produce these types of graphic effects? The options that I have identified so far:
1.) More carefully done line smearing (see below..)
2.) Line drawing with a VB.Net version of the "Bresenham's line drawing algorithm"(as passel mentions in this post) (that might allow a specialized set anti-aliasing routines - like a wu algorithm).
3.) Line drawing with some Gaussian blurring as seen in the attachment to this post from my Perlin Noise thread.
4.) Possibly a gradient shaped by a vector GraphicsPath?
5.) Some other VB.Net gradient generating method?Possible the use of multiple passes with an alphafade brush?
6.) Last resort: manipulating the colors of individual pixels with lockbits marshal copying (highly undesirable).
I've done a fairly complete survey of whats out there on the internet for VB.Net samples for drawing lines to see if any of them combined line drawing with gradient effects and found very little.I played around with some code I found that did line drawing through mouse dragging and managed to achieve what I call the "line smearing" effect.I've attached my Line_Smearing_Demo below..As yet I have been unable to combine lines with shaped bezier curves,to produce Guilloche/Lissajous/complex Spirograph patterns like those seen on this page.