Re: Mouse Coordinates in a specific area. - C# Discussion Boards

Mouse Coordinates of a bitmap form in the main window

17-Apr-09 4:02

The problem is that you are only telling it to add one item.

Replace:

if (dr.Read() == true)

with:

while (dr.Read())

and all should work as required.

Incidentally, you should have posted this as a reply to musefan. He was waiting to help you. He's probably sitting in front of his computer crying now, because you haven't replied! Smile | :)

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

sebogawa17-Apr-09 3:44

sebogawa

17-Apr-09 3:44

I have the mouse event handler function that takes the mouse x and y coordinates and converts that integer to a string and is sent to two text boxes, one for each axis. I am trying the get the x and y coordinates of the mouse when it is on any part of a live video stream bitmap. It is for a color tracking app, ill eventually get the color ARGB values of the pixel the mouse is over and save it to the color filter value chart. I digress, all i need to know is where do i have to place my function:

protected override void OnMouseMove(MouseEventArgs mouseEv)
{
txtMouseX.Text = mouseEv.X.ToString();
txtMouseY.Text = mouseEv.Y.ToString();
}

so that i get the coordinates of the bitmap, not the application window.

modified on Friday, April 17, 2009 10:06 AM

Henry Minute17-Apr-09 4:08

17-Apr-09 4:08

If you put the Bitmap on the window, you should know its coordinates. Keep your code where it is but put a test before your existing code to see if the mouse is in the rectangle for the image. If not in the rectangle, return. Then just add offsets to your two lines for the X and Y coordinates of the image.

sebogawa17-Apr-09 4:14

sebogawa

17-Apr-09 4:14

The issue is that I stop receiving coordinates when the mouse enters the bitmap rectangle due to the fact that it is part of a form group. How do i get rid of the border that separates the bitmap and text boxes from the rest of the application window.

Henry Minute17-Apr-09 4:20

17-Apr-09 4:20

sebogawa wrote:
due to the fact that it is part of a form group

I do not understand. What, exactly, is a form group? Do you mean that the image is on one form, and the TextBoxes are on another?

If not, then please clarify.

sebogawa17-Apr-09 4:28

sebogawa

17-Apr-09 4:28

Ill try my best to explain. So imagine a simple form window. It has a black rectangle, thats the video feed bitmap thing, then it has two text boxes. The bitmap rectangle and the text boxes are surrounded by a border that groups then under a specific title. I got the color filtering code from the "Lego Pan and Tilt with color tracking" app posted on this site. The mouse coordinates only change value in the textboxes when the mouse is outside the group border, but still inside the main window. If u look up the Lego app u will see what i am talking about in the images posted with that article. Everthing in the picture is the same except for two text oxes under the bitmap rectangle. Thanks for healping : )

Henry Minute17-Apr-09 4:46

How to add items in listbox from database

17-Apr-09 4:46

sebogawa wrote:
thats the video feed bitmap thing

And is the 'bitmap thing' actually a control?

If it is, then in the designer, select it, in the Properties Window, switch to Events page and double click on the MouseMove event. Put your code in the handler stub created in the code view for the form, should work OK, no need for offsets etc..

kaushik_dass17-Apr-09 3:27

kaushik_dass

17-Apr-09 3:27

i tried to add the items in listbox from database but it adds only one record from database

Re: How to add items in listbox from database

musefan17-Apr-09 3:36

musefan

17-Apr-09 3:36

how did you try to do it? post some example code

Life goes very fast. Tomorrow, today is already yesterday.

Re: How to add items in listbox from database

PauloCastilho17-Apr-09 12:38

PauloCastilho

17-Apr-09 12:38

Try to use this two properties: DataValueField and DataTextField.
e.g.

<br />
//SOURCE_FROM_DB -> The method or object or ... whatever ... that has the items.<br />
myListBox.DataSouce = SOURCE_FROM_DB;<br />
//VALUE_COLUMN_NAME -> The column name of the DataSource that represents the VALUE of the item.<br />
myListBox.DataValueField = "VALUE_COLUMN_NAME";<br />
//TEXT_COLUMN_NAME -> The column name of the DataSource that represents the TEXT of the item.<br />
myListBox.DataTextField = "TEXT_COLUMN_NAME";<br />
myListBox.DataBind();<br />

How understand Dataset changes ?

Coban_17-Apr-09 3:22

Coban_

17-Apr-09 3:22

Hi all, I have a dataset which I have designed in database designer. I have desinged a form with drag drop datasources. So there is a navigator. If I change some textboxt value etc.. at run time, When I had pressed buttons on navigator (Next, Previous, First or Last) before I saved. , Can it give a message that is
"There are some changes. Do you want to save ??"

How can I understand cahnges on dataset at runtime ??

Thanks all

S.A.A

Creating a Help Form

caksabre217-Apr-09 3:14

caksabre2

17-Apr-09 3:14

Hello,

I really want to create a help page in my C# windows application and was wondering if anyone has any recommendations on best practice for this.

Cheers,

Chris

Henry Minute17-Apr-09 4:11

17-Apr-09 4:11

There are plenty of examples for this on MSDN and the Web. Search for 'creating application help .NET'.

caksabre217-Apr-09 5:16

caksabre2

17-Apr-09 5:16

Sorry Henry, but I tried searching on that with the quotes and still didn't find anything.

Could you specify and exact page?

Thanks

Henry Minute17-Apr-09 5:24

17-Apr-09 5:24

Try Googling 'creating help' or 'creating help files'. Without the quotes. Loads of hits. Take your pick.

Naruki19-Apr-09 15:53

Naruki

19-Apr-09 15:53

You could have just said "no". It's as helpful and more accurate.

Codemonkeys don't do it at all. Too busy coding.

Henry Minute19-Apr-09 23:36

19-Apr-09 23:36

I disagree.
Saying no, would achieve nothing. By pointing out likely phrases to Google for the OP gets a chance to find an article that they can understand. The topic was too complex to allow a simple step by step answer, or a code snippet. Equally, my own favourite article might not have suited the OP.
This way they get to choose their own.

I had originally given what I thought was a likely phrase, the OP said it was no good, even though it was very, very similar to those suggested later. The OP had neither the wit nor intelligence to modify it for themself, in order to get more relevent responses. The topic is such a common one that there are thousands of articles on how to do it, no point in re-inventing the wheel.

simple page load query

AndyInUK17-Apr-09 2:39

AndyInUK

17-Apr-09 2:39

Hi all,

How can i call a private void abc(def ghi) method from a page load.
Here def is a abstract class.

Thank you

*Developer Day Scotland - Free community conference Delegate Registration Open

Colin Angus Mackay17-Apr-09 2:45

Colin Angus Mackay

17-Apr-09 2:45

AndyInUK wrote:
How can i call a private void abc(def ghi) method from a page load.
Here def is a abstract class.

def being an astract class isn't going to make any difference that I can see. ghi is a reference to the base class def, ghi will naturally have to be a instance of a class derived from def that isn't abstract.

The issue is where is this private method located. If it is in the same class as the Page_Load then that's fine. If it is anywhere else then it isn't fine.

AndyInUK17-Apr-09 2:51

AndyInUK

17-Apr-09 2:51

yes it is in the same class as Page_Load. it is user control code basically.
but i am not getting the right syntax ?

i have tried calling abc(ghi). This gives me runtime error. So is something wrong with the method or i am calling it wrongly in page load

*Developer Day Scotland - Free community conference Delegate Registration Open

Colin Angus Mackay17-Apr-09 2:56

Colin Angus Mackay

17-Apr-09 2:56

AndyInUK wrote:
but i am not getting the right syntax ?

Something like this?

// define ghi
def ghi = new jkl(); // jkl is derived from def
 
// make the call:
abc(ghi);

If that isn't want you meant could you explain a bit more.

*Developer Day Scotland - Free community conference Delegate Registration Open

Colin Angus Mackay17-Apr-09 3:16

Colin Angus Mackay

17-Apr-09 3:16

That was odd... Your message just disappeared. Here is my response to it.

AndyInUK wrote:
So how to create instance of this abstract class ?

You cannot make an instance of an abstract class. Marking a class as an abstract is telling the compiler that you don't want anyone creating an instance of it. You must derive from an abstract class and make an instance of that.

AndyInUK wrote:
And how did the jkl derived from abc?

public abstract class abc
{
    // You class content goes here
}
 
public class jkl : abc // jkl is derived from abc
{
    // Your class content goes here
}