Re: Using delegate for WindowProc - possible ?
On Thursday, 29 December 2011 at 20:08:45 UTC, bls wrote:
import std.stdio;
import std.functional;
int main(string[] argv)
{
extern(Windows) int delegate( int i) dg;
alias dg callback;
callback = toDelegate(&test);
writeln( callback( 1 ) );
readln();
return 0;
}
extern(Windows) int test(int i) { return 41 +i;}
hth, bjoern
Wow! This is actually pretty cool! I needed something similar,
but it was to call a member function from the Windows procedure,
and I had to use some thunking though assembly.
Maybe I can adapt my code to use a delegate like this instead.
Re: Using delegate for WindowProc - possible ?
On 12/28/2011 03:45 PM, Tal wrote:
Can I do something like this :
__
extern (Windows) LRESULT delegate (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) MyWinProcDelegate;
this() {
MyWinProcDelegate =&Events;
}
extern (Windows) LRESULT Events (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) {
MessageBoxA(null , "Success!!!" , null ,0);
return DefWindowProcA(hWnd, message, wParam, lParam);
}
__
The Events() doesn't seem to fire... am I missing something ?
ok next try, this works for me.
import std.stdio;
import std.functional;
int main(string[] argv)
{
extern(Windows) int delegate( int i) dg;
alias dg callback;
callback = toDelegate(&test);
writeln( callback( 1 ) );
readln();
return 0;
}
extern(Windows) int test(int i) { return 41 +i;}
hth, bjoern
Re: Using delegate for WindowProc - possible ?
On 12/28/2011 03:45 PM, Tal wrote:
Can I do something like this :
__
extern (Windows) LRESULT delegate (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) MyWinProcDelegate;
this() {
MyWinProcDelegate =&Events;
}
extern (Windows) LRESULT Events (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) {
MessageBoxA(null , "Success!!!" , null ,0);
return DefWindowProcA(hWnd, message, wParam, lParam);
}
__
The Events() doesn't seem to fire... am I missing something ?
ok next try : At least it compiles ..
import std.functional;
int main(string[] argv)
{
extern(Windows) int delegate() dg;
alias dg callback;
callback = toDelegate(&test);
return 0;
}
extern(Windows) int test() { return 42;}
hth, bjoern
Re: Using delegate for WindowProc - possible ?
On 12/28/2011 03:45 PM, Tal wrote:
Can I do something like this :
__
extern (Windows) LRESULT delegate (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) MyWinProcDelegate;
this() {
MyWinProcDelegate =&Events;
}
extern (Windows) LRESULT Events (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) {
MessageBoxA(null , "Success!!!" , null ,0);
return DefWindowProcA(hWnd, message, wParam, lParam);
}
__
The Events() doesn't seem to fire... am I missing something ?
Maybe std.functional toDelegate() ?
auto DelegateToUse = toDelegate(&Events);
Not sure how much sense this makes...
If I recall correctly I have used
alias extern windows LRESULT delegate() callback;
callback = &cbfunc;
As said I am not sure, hth Bjoern
Re: Using delegate for WindowProc - possible ?
On Wednesday, 28 December 2011 at 23:45:05 UTC, Tal wrote:
Can I do something like this :
__
extern (Windows) LRESULT delegate (HWND hWnd, UINT message,
WPARAM wParam,
LPARAM lParam) MyWinProcDelegate;
this() {
MyWinProcDelegate = &Events;
}
extern (Windows) LRESULT Events (HWND hWnd, UINT message,
WPARAM wParam,
LPARAM lParam) {
MessageBoxA(null , "Success!!!" , null ,0);
return DefWindowProcA(hWnd, message, wParam, lParam);
}
__
The Events() doesn't seem to fire... am I missing something ?
Nope. You are trying to assign the address of a function to a
delegate, both are differents.
Using delegate for WindowProc - possible ?
Can I do something like this :
__
extern (Windows) LRESULT delegate (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) MyWinProcDelegate;
this() {
MyWinProcDelegate = &Events;
}
extern (Windows) LRESULT Events (HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) {
MessageBoxA(null , "Success!!!" , null ,0);
return DefWindowProcA(hWnd, message, wParam, lParam);
}
__
The Events() doesn't seem to fire... am I missing something ?
