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I don't think its convoluted at all. In fact, I think my way is much easier than your suggestion. The unique color value would be an index into the table of elements. She wouldn't have to draw anything but one bitmap, and she would only need an element class and to read in the color values of the template bitmap beforehand.
She could do a stretchblt to make both bitmpas fit the window size.
"It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt." - Abraham Lincoln
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But what about window resizing?
When all you need to do is draw a rectangle with text, then I tend to use GDI to draw a rectangle and text.
Although there is a certain elegance when you get down to determining which element was clicked on, the building the infrastructure for such elegance is worse than using a slightly less tricky technique.
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Terry O`Nolley wrote:
But what about window resizing?
Use StretchBlt to resize both the on screen table graphic and the off screen template graphic, assuring that they remain the same size.
Most Element tables aren't arranged in a square grid pattern. The look more like this: http://www.webelements.com/[^]
It's easy to draw X elements with i rows and j columns, but its not so so easy to draw 2 on one row, 4 on another, etc.
Terry O`Nolley wrote:
Although there is a certain elegance when you get down to determining which element was clicked on, the building the infrastructure for such elegance is worse than using a slightly less tricky technique.
You have one offscreen DC containing the template bitmap. If the screen and template are the same size, all you have to do is call dcOffScreen.GetPixel(x,y) to get the color at the point clicked. If it's black, then they didn't click on an element. If its not black, find the element with that color and there you have it. The hardest part would be reading the colors into your element object, but that could be hard coded if need be.
"It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt." - Abraham Lincoln
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THe more you describe it, the more I like it.........
I think I just have an aversion to using large bitmaps when not necessary.
Another drawback to using bitmaps is that if you need to change any text, or add functionality you have to redo the bitmaps.
I am actually writing this app with an eye on the entire design process for a beginners article.
I'm using an Access database to hold the info about the elements and GDI to do the display graphics. WHen I find new info about an element, say the discoverer, I can just update it and not have to worry about creating a new bitmap and doing all of that color mapping.
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Terry O`Nolley wrote:
I think I just have an aversion to using large bitmaps when not necessary.
I don't know how to make bitmaps anyway. Although, if everyone here feels this is the best way for me to do it, I guess there's no harm in learning! I want to impress my boss (he already loves everything I've done so far!), so all this help you're all giving me is great!
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I wrote up a quick and dirty demo of this conscept. I'll send it to you if you're interested. I think I'll write an article on it too.
"It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt." - Abraham Lincoln
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Yes, I'm definitely interested in seeing how you did it. I still don't completely know how I want to go about doing this, so it would be nice to have something to look at.
Thanks so much.
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Want me to send this to you via email?
"It is better to remain silent and be thought a fool than to open one's mouth and remove all doubt." - Abraham Lincoln
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Yeah, can you send it through this, or do i have to give you my email address? (I don't mind if i have to, it's not that big of a deal really)
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Ok, i saw the ? thing used in some code, and i dont know what it does. I tried googling, but, um, i dont know what its called, and you cant google for "c++ ?" very easily.
So, what is it called so i can google for it lol.
*.*
cin >> knowledge;
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You mean like: int foo = (blah == 2) ? 1 : 0; or something like that? If so, that's a conditional expression, referred to variously as "immediate if", the "ternary operator", the "conditional operator", or simply the "?:" operator. It's basically an "if..then..else" type of expression that returns a value. Users of functional languages are very familiar with doing conditionals like this.
- Mike
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ok, so in the example above, it basically means
<br />
(if blah == 2)<br />
{<br />
foo = 1;<br />
}<br />
else<br />
{<br />
foo = 0;<br />
}<br />
<br />
pretty neat...thanks-o.
*.*
cin >> knowledge;
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do you mean the ? : operator????
This is just an abbreviation for an if else statement used in C++. Consider the following for example:
return x = a ? b< c : d > a;
In this case x is either (b<c) or="" (d="">a) depending on the programming return value.
Hope it helps.
Regards.
Alex
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I was able to redistribute MSXML4 using a msi package. everything worked ok till i was working as administrator on a Windows 2000 box , when I logged on as a user I got an error in the XML part of the code saying that the object couldnt be created ! What do i need to do ?
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Might be a permissions issue. Do you have the error code?
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I am pretty confidant its bcos of permissions or things not getting setup globally ( like for all users , admins etc ) .
hr=m_plDomDocument.CreateInstance("Msxml2.DOMDocument.4.0");
if(FAILED(hr)){
::MessageBox(0,"Failed Dom Document CreateInstance",0,0);
I get the messageBox indicating an error while running as an User .
As an user I cannot even get access permissions to install the MSXML cab redistribution file to write certain registry keys !
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You might want to check with the XML/XSL forum on this website.
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I don't know much about thread programming, but I have a general question. Are threads more of an operating system function. For example there isn't any thread functions in the STL are there? Wouldn't threads be dealt with differently on Linux and Windows?
Thanks.
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Anonymous wrote:
For example there isn't any thread functions in the STL are there?
Correct.
Anonymous wrote:
Wouldn't threads be dealt with differently on Linux and Windows?
While the implementation between the two OSs would no doubt be different, I suspect the net result of each would be somewhat similar.
Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?
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Hi,
yes threads are part of the Operating system. Windows for example handles threads in a different manner than Unix or Linux does. Windows assigns to each thread a certain amount of time during which this thread can perform its task. If there are multiple threads at one time Windows determines which thread has priority of the others and executes this thread. Linux and Unix handle threads differently. The stl can also handle threads yet it does not have a special class or library that deals with threads. You have to write your own thread managing class or library.
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Thanks for the information.
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Hi all,
I was wondering if there was a way to parse a binary number that I receive over a TCP port, into either 4 bit chunks or into hex.
Thank you.
Jimmy
Just cause I am 15, doesn't mean I'm dumb! (I'll really be 4 on Feb. 29...the year 2004)
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