unsigned short int x, y;
for(x=0; x<9; x++) {
for(y=0; y<9; y++) {
// Code to create controls
STATIC_xy = CreateWindow(
"STATIC",
"-",
WS_VISIBLE | WS_CHILD,
10 + x, 10 + y, 30, 30,
hwnd,
(HMENU) ID_STATIC_xy,
NULL,
NULL);
}
}
Array of Controls
Author
Hi,
I want to create several controls dynamically in Win32 C++. Because typing out 9*9 controls and edit their position is quite difficult, I would like to create them using a for loop:
Author
Quote:Original post by Sneftel
What is "STATIC_xy"?
This is what I meant by STATIC_xy, it should be a dynamic name:
STATIC_00
STATIC_01
STATIC_02
...
STATIC_99
Congratulations, you chose one of the few programming languages that don't allow dynamic variable naming. :) As I understand it, for the most part you can only do that with interpreted languages, so you're going to have to be more clever about it.
I'm not familiar with Win32 programming, but since CreateWindow just returns a window handle, it seems to me that a simple array will do the trick, especially since you know exactly how many you want to create.
I'm not familiar with Win32 programming, but since CreateWindow just returns a window handle, it seems to me that a simple array will do the trick, especially since you know exactly how many you want to create.
Quote:Original post by brechtjahQuote:Original post by Sneftel
What is "STATIC_xy"?
This is what I meant by STATIC_xy, it should be a dynamic name:
STATIC_00
STATIC_01
STATIC_02
...
STATIC_99
C++ doesn't work that way; the variable names don't "exist" in the compiled code.
The natural way to accomplish this sort of thing is with a container. You can use one from the standard library, such as std::vector, or an array, which is built-in.
Author
Quote:Original post by ZahlmanQuote:Original post by brechtjahQuote:Original post by Sneftel
What is "STATIC_xy"?
This is what I meant by STATIC_xy, it should be a dynamic name:
STATIC_00
STATIC_01
STATIC_02
...
STATIC_99
C++ doesn't work that way; the variable names don't "exist" in the compiled code.
The natural way to accomplish this sort of thing is with a container. You can use one from the standard library, such as std::vector, or an array, which is built-in.
Would it then still be better (here better not in the meaning of efficient) to create all 81 controls?
what you would have to do is this
// for example's sake, x = 5
HWND *controlList = new HWND[x]; //dynamicly allocate(create) enough room
//for your list of controls
for(i = 0;i<x;i++)
{
controlList = CreateWindow(fill this with stuff);
}
// for example's sake, x = 5
HWND *controlList = new HWND[x]; //dynamicly allocate(create) enough room
//for your list of controls
for(i = 0;i<x;i++)
{
controlList = CreateWindow(fill this with stuff);
}
Quote:Original post by godsenddeath
what you would have to do is this
// for example's sake, x = 5
HWND *controlList = new HWND[x]; //dynamicly allocate(create) enough room
//for your list of controls
for(i = 0;i<x;i++)
{
controlList = CreateWindow(fill this with stuff);
}
You forgot to delete [] the data you newed.
I would strongly consider the use of a standard container instead of raw memory management. In this case, std::vector<> with some clever indexing or boost::multi_array could work.
Author
Thanks for all the help, however, I've bumped into a problem I don't understand. This is my code:
It gives me the following error (Dev Cpp):
'column' cannot appear in a constant expression
I've never seen this error, some articles on Google speak of doing something tat is not allowed by the standards but why wouldn't you be able to do the above code?
EDIT: I solved it like this, but why won't it accept a two dimensional array?
[Edited by - brechtjah on November 15, 2008 5:48:59 AM]
unsigned short int row, column, i; row = 9; column = 9; i = 0; HWND *controlList = new HWND[row][column]; for(row=0;row<9;row++) { for(column=0;column<9;column++) { controlList[row][column] = CreateWindow("EDIT", NULL, ES_CENTER | WS_VISIBLE | WS_CHILD, 10+row*30, 10+column*30, 20, 20, hwnd, (HMENU) 400+i, NULL, NULL); i++; } }It gives me the following error (Dev Cpp):
'column' cannot appear in a constant expression
I've never seen this error, some articles on Google speak of doing something tat is not allowed by the standards but why wouldn't you be able to do the above code?
EDIT: I solved it like this, but why won't it accept a two dimensional array?
unsigned short int row, column, i; row = 9; column = 9; i = 0; HWND *controlList = new HWND[81]; for(row=0;row<9;row++) { for(column=0;column<9;column++) { controlList = CreateWindow("EDIT", // Window Type NULL, // Text ES_CENTER | WS_VISIBLE | WS_CHILD, 10+row*30, 10+column*30, 20, 20, // x, y, width, height hwnd, // Parent Handle (HMENU) 400+i, // Window ID NULL, NULL); i++; } }[Edited by - brechtjah on November 15, 2008 5:48:59 AM]
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