Draw A Circular Gradient?
Mar 22, 2011How do I draw a circular gradient like this in vb.net?
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Circular Motion In VB?
Dec 24, 2009I have to make a learning object program for a school project and i am doing it about circular motion and satellite orbits.how i can get a object to orbit around another object in visual basic, allowing the orbit radius to vary as the user inputs values?
View 2 Replies.net - Circular Dependency Between MODEL And BLL?
Sep 1, 2011Assuming an architecture as such.MODEL > BLL > DLL
Trying to implement lazy loading in my MODEL I have run into a circular dependency between my MODEL and BLL..Basically imagine a property in my model that I want to implement as follows
Public Readonly Property ProjectCategory As ProjectCategory
Get
If Me._ProjectCategory Is Nothing Then
Me._ProjectCategory = ProjectCategoryBLL.GetProjectCategoryByID(Me._ProjectCategoryID)
End If
[Code]...
I have my MODEL, BLL and DLL in separate projects and because of the fact that my BLL references my model I can not reference my BLL from my model as this would create a circular dependency.
Working With A Circular Transparency?
Aug 24, 2009my team is working on an application where we have to have one image which is acting as the base of all the elements on the screen.. and this same image has a transparency in the center. now this centre transparency is supposed to display a picture which will be captured from a web cam.currently everything working fine but the only problem which we are facing is that the picture is not proportionate to what is the actual resolution that it was shot at. it has been stretched from the top and bottom. the reason is that the imagebox which has been used to call this webcam display is a aquare.now it seems that the team is not being able to use the exact proportions of the image to call it in the picturebox for a reason that the final image needs to be cropped to fit in a circle.in simple words, i have a rectangular image and i want to draw a circle over this image. whatever is within the circle should be visible, whatever is outside the circle should be transparent. (a mask needs to be created...)but the only thing is that this circle will first display the image/video from the web camera and only once the picture is clicked, it should show the same picture within this circular area.
View 3 Replies.net - High Speed Circular Buffer?
Jun 8, 2012I have been asked to improve the memory efficiency of an application that is used for high speed data acquisition. After running the VS memory profiler several times and scanning the projects for obvious issues I came to the following conclusion: despite using a fixed size circular buffer for storing acquired sample points, the RAM usage increases relative to the polling period. For example: polling data for one signal at 2 microseconds can use 5 times more memory (private bytes) than when running at 50 microseconds ... even though the buffer size is the same.
The circular buffer is an array of SamplePoint objects. Each of these objects contains an array of Shorts (16 bit) for corresponding data per signal and one date object (8 bytes) for the time stamp. For efficiency, the circular buffer is Redimmed only once every time it begins polling and filled with empty sample points which are then "assigned".
Also, it seems that when we stop and run the application it hogs even more memory each time as though the Redim is not releasing the previous array. My questions boil down to the following: What is most memory efficient way of implementing a circular buffer containing managed objects which have arrays?Also, how and why is memory usage increasing with a fixed size array with different polling speeds? Does the garbage collector not have time? Do local variables get disposed of IMMEDIATELY when a sub or function exits?These are some of the doubts and concerns that I would like to rule out before proceeding.
[Code]...
Circular Reference In A TextBox_TextChanged Event?
Jun 10, 2009I have created a TextBox array where certain cells are assigned a number which I do not want the operator to change either intentionally or inadvertantly.The relevant TextBox cells are identified by their BackColor, (in this case LightBlue)If the cell is changed the original content is immediately assigned to the cell and a relevant message is displayed.My problem is that by changing the value back to its original value I create another TextChanged event and the consequence is that the MsgBox is displayed twice, one after the other.I have avoided the problem by not displaying a message box. The outward appearance is that the TextBox is not changed at all, which of course is my aim.However I would prefer to display a message box.An example of the scenario is shown below.
Another bewildering fact, (to me), is that in the example below, if the check is not made of the BackColor but instead the value of the TextBox the problem doesn't occur
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
If TextBox1.BackColor = Color.LightBlue Then[code]...
In the example above, if in the Text_Changed event handler the 'Remark' is changed from one 'If' statement to the other the differences in the result can be seen.
Circular Referencing - Validated Three Lists
Oct 5, 2010I'm working on creating my own sudoku solver to learn vb.net. I decided to have an element class which represents a single square in the puzzle. That element then has references to three lists which can be validated (no duplicate numbers). The three lists then would be its corresponding row/column/subGrid. Each list then holds a reference to 9 elements. Thus in my design an element has a reference to a list, which then holds a reference to that same element. Now vb.net will allow me to do this so I don't think it is the same issue that I saw when searching for solutions to circular referencing. However, I still wonder whether or not this is bad design.
View 2 RepliesCreate A Circular Buffer On The Heap?
Feb 24, 2010How can I create a circular buffer on the heap in VB.NET ? This would be used for audio playback via P/Invoke to winmm.dll waveoutopen and waveoutwrite to support development of a software synth. I currently use the marshall class to build a regular array of bytes in the heap.
View 1 RepliesCreating A Circular VB Form - 2008?
Jan 31, 2010Is it possible to create a circular visual basic form. I see plenty of tutorials on how to do this for VB6 but none on Visual Basic Express.
View 7 RepliesDisposing Of Objects And Circular References
May 24, 2010I have a button which opens FormTest. When FormTest opens, it creates an instance of ClassTest and that class instance takes the form instance that called it (FormTest) so that it can perform operations on FormTest from the ClassTest class instance. So i have a form which owns an instance of a class which has a reference to the form.
[Code]...
DotNetBar Circular Progress Bar - Marquee?
Feb 7, 2012There is a question that I have from YEARS after working with DotNetBar Components that How do you set the Marquee style of a normal progress bar on the circular one? The circular progress bar from DotNetBar, i want to be clear.There is no "Style" Property and now I really need to know it for a project I'm doing now
View 3 RepliesUse Circular Reference In A Calculation In Program?
Sep 1, 2010I've got a requirement where I need to calculate a value, however also refer to this value when calculating it. So I've got for example[code]...
I can see how this can be achieved in excel using Circular Reference, however I'm not sure how I go about it when using VB.Net. Is there a similar method to create a Circular Reference as in excel or any other way I can possibly work out the TotalValue?
Make A Circular Portion Of Rectangle Transparent?
Apr 26, 2011If I were to draw a rectangle with e.Graphics.FillRectangle(), how would I make a circular portion of the rectangle transparent?
View 1 RepliesVS 2010 DirectSound - Streaming / Circular Buffer?
Feb 8, 2012I use the following code (with Imports Microsoft.DirectX.DirectSound and Microsoft.DirectX) to play sound using an 8 second static buffer:
Dim SD As Device = New Device
SD.SetCooperativeLevel(Me.Handle, CooperativeLevel.Priority)
Dim MS As New IO.MemoryStream(Gbuffer) ' Gbuffer is byte array with properly formatted WAV data
Dim waveFormat As New WaveFormat
waveFormat.SamplesPerSecond = 44100
[Code] .....
What I would like to do next is to change to a "circular" or "streaming" buffer so that I can write new data "on the fly". I've done a lot of Googling but can't quite see how to adapt my present code to use a circular buffer. I can get the current write and play positions using Msb.GetCurrentPosition(iPlayPos, iWritePos) but how do I actually insert new data into the buffer? I have tried "manually" writing new data into my Gbuffer byte array but that doesn't work - I guess once a sound has been played through once, the data is cached somewhere and the contents of Gbuffer are not used again.
C# - Delegate Event To Form Without Creating Circular Reference
Jun 19, 2012I have a class that is in an assembly due to being required for other projects that I'm currently working on. One class lets call it Class Factory, creates a group of controls which require click event handlers to be attached, I have algorithms which determine polymorphic behavior based on certain features but that is relatively irrelevant.
Due to the event handler having to open up a specific form that isn't part of my assembly, and that form requiring this "Factory" class. Without creating circular reference is there any way I can essentially "delegate" the handler event for the form to define? As a simple work around I have had to maintain two separate classes, one in the project with the form and one in the assembly.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Width = 1500
Dim panel As New Panel
panel.Location = New Point(0, 0)
panel.Size = New Size(1000, 200)
[Code] .....
Custom Serialization And Circular References, Is There A Clean Solution?
Aug 3, 2010I'm implementing some custom serialization (to byte array), and have run into a problem handling circular references.Example:
Class A
public MyBs as new List(of B)
End class
Class B
public MyParent as A
public MiscInt1 as integer[code]....
If I know that an instance of B will only ever be serialized through the serialization of an instance of A, then I can handle the setup of the MyParent reference from the instance of A and not even record that information inside the byte buffer for the instance of B.This doesn't feel quite right, but it might be the best solution.
VS 2005 - Program To Implement Queue Using Circular Array?
Nov 30, 2009I'm a newbie in visual basic. We have a project in our school in implementing queue using circular array.
View 5 RepliesGet DataGridView To Draw The Way A Professional Control Should Draw?
Apr 26, 2010I need to get the DataGridView to perform the way it should perform. I'm new to the .NET environment, but I learn fairly quickly. However, I find it difficult to decipher themassive black box of the DataGridView control enough to make it do anything other than what it already does--Draw very slowly.
View 3 RepliesApply Gradient To A Square?
Apr 8, 2012I am working in vb.net, visual studio 2010.
So i want to apply gradient to a square, a center to edges gradient. This is the code:
Public Class Form1
Private Sub PicSourcefrm(ByVal sender As System.Object, ByVal e As PaintEventArgs) Handles Me.Paint
Dim Graph As Graphics
[Code].....
NOTE: Picsource is just a PictureBox named that way. If I put "BrushSquare.SurroundColors = Color.Red" in a comment. The program works but the edges are white, not red like I want them to be.
Cannot Get Gradient Form To Work
Jun 18, 2009I have this code for a gradient form(EXAMPLE 1). It works fine on its own.I tried putting it into an existing project of mine and I cannot get it to work. The project is quite large so I am no sure what the issue is. Is it due to the fact that I have an InitializeComponent() line in the my Sub New in Example 2? Note I have alot of code
EXAMPLE 1:
Public Class Form1
Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
'Creating a new Rectangle as similar width and height of the base form
[code]....
Cannot Get Gradient Form To Work?
Oct 29, 2009I have this code for a gradient form(EXAMPLE 1). It works fine on its own. I tried putting it into an existing project of mine and I cannot get it to work. The project is quite large so I am no sure what the issue is. Is it due to the fact that I have anInitializeComponent() line in the my Sub New in Example 2? Note I have alot of code
View 1 RepliesDataGridView - Add Separate Gradient To Each Row?
Apr 21, 2010DataGridView, add unique gradient to each Row I like to add a gradient brush to each row of my datagridview. I like to change the gradient colors for each row independently depending of some cell values in the row. I know how to add a solid background color to each, cell, row, column etc. but I do not know how to add a gradient brush to each row individualy.
I need to fill the datagridview with values, the datagridview is disconnected from any database or other data source. After filling the datagridview, I want to step trough each row, find my key values, decide the gradient colors and then add the gradient to the row.I like to do something similar to what I now do with a background color:
For Each R As DataGridViewRow In DGV.Rows
Dim CS As New DataGridViewCellStyle
Select Case i
[code].....
I am using VB.NET and VS 2008 and 2010.
DataGridView, Add Unique Gradient To Each Row
Apr 22, 2010I like to add a gradient brush to each row of my datagridview. I like to change the gradient colors for each row independently depending of some cell values in the row.
I know how to add a solid background color to each, cell, row, column etc. but I do not know how to add a gradient brush to each row individualy.
I need to fill the datagridview with values, the datagridview is disconnected from any database or other data source. After filling the datagridview, I want to step trough each row, find my key values, decide the gradient colors and then add the gradient to the row.
I like to do something similar to what I now do with a background color:
For Each R As DataGridViewRow In DGV.Rows
Dim CS As New DataGridViewCellStyle
Select Case i
[Code]....
Gradient Background Without Images
Apr 27, 2012How can I create a gradient background for my form and text without using any images and how can I add multiple images in same form background in VB.NET?
View 1 RepliesMake A Gradient That Goes To Four Corners?
Jul 30, 2009I Have been working with the gradient brush, and its quite cool I would Though like to make a gradient that goes to four corners, where each corner is a different color. Anyone know how to do this, or any short tutorials on this?
View 5 RepliesRepeat Gradient PDF Background
Nov 25, 2010I am creating a page that auto-creates a pdf file from data in the database. I have the entire pdf working with the exception of the pdf background. The customer wants a gradient which I will need to repeat, but how would I create this? the image is 1px in width 976 in height [Code]. I was hoping that declaring a longer width it would stretch the image across but this failed.
View 1 RepliesC# - Enable Circular Dependencies In Visual Studio At The Assembly Level?
Jul 3, 2010So in Visual Studio, you can't have two projects X and Y such that X references Y and Y references X.In general, I can totally understand how having a circular dependency can be problematic, for a variety of reasons.But is it really not possible to compile two projects that are interdependent in this way? It seems to me that it must be possible, since (in my mind -- maybe I'm completely off-base about this) having two mutually dependent assemblies is really not so different from having two mutually dependent classes -- a case which is legal and can be compiled.
It would make sense to me if you said, "two assemblies cannot depend on each other because the compiler could not compile one before the other"; except that it seems you could make the same argument for two classes within the same assembly, and clearly the compiler can deal with this scenario just fine.
Basically the reason I'm asking is not that I have some desperate desire to do this thing that I know is generally ill-advised anyway. Specifically I'm wondering because it would be nice if I could have two projects -- say, MyProjectCS and MyProjectVB -- that existed basically as two mutually dependent parts of a single unit, and were only separate because certain parts were written in C# and other parts were written in VB.NET.
Is it possible to enable this behavior (in Visual Studio, or elsewhere, for that matter)? If it's not possible within any IDE, it it at least theoretically possible, or could mutually dependent assemblies not possibly exist? If it's not even theoretically possible, why not? In other words, how are mutually dependent assemblies different from mutually dependent code within a single assembly?
Code Organization - .NET Circular Dependency / Duplex Communication Between Projects?
Oct 16, 2011I have 2 projects
UI
Functionality
UI references Functionality to call specific functions. Functionality needs to call certain functions that operate UI. This is what I mean by Duplex communication. Is there any way to do this without causing circular dependency?Should there be 1 main project which simply does all the calling acting as a "wrapper" between UI and Functionality?
Oop - .NET Class Properties Ends Up In Circular References And Through StackOverflow Exception?
Jan 9, 2012I have 2 classess. Role and User like this
Role
Public Class Role
Public Property RoleID As Integer
Public Property CreatedBy As User
[code]....
The situation is like when we create roles, we will save who created this role. So i have a CreatedBy Property of type User. Similarly when we create a User, we will mention what role the new user belongs to .So i have a property called "Role" of type "Role". This circular reference giving me StackOverflow exception as its recursive when i create an object of User class.How do i handle this ? should i restucture my entties ? how ?
Drawing A Gradient In Visual C++ 2008?
Feb 9, 2010I'm trying to draw a simple rectangular gradient but I keep getting this one error. Here is the code below: Drawing::Rectangle^ myRectangle =
gcnew Drawing::Rectangle(10, 10, 100, 100);
Drawing2D::LinearGradientBrush^ myGradient =
gcnew Drawing2D::LinearGradientBrush(myRectangle ,Color::Red, Color::Blue, 50);
e->Graphics->FillRectangle(myGradient, 20, 30, 100, 100);