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Home » U++ Library support » U++ Widgets - General questions or Mixed problems » PrintJob does not works on "large project"
| PrintJob does not works on "large project" [message #30404] |
Tue, 28 December 2010 15:51  |
alex100
Messages: 118
Registered: November 2007
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Experienced Member |
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Hi all
I have a problem on printing that just happens on a large UPP project I have.
If I compile and execute the following project:
#include "teste2.h"
teste2::teste2()
{
CtrlLayout(*this, "Window title");
btBut <<= THISBACK(OnBut);
}
void teste2::OnBut(void)
{
PrinterJob pj;
Draw& w = pj;
w.StartPage();
w.DrawText(0, 0, "Hello world!", Roman(100));
w.EndPage();
}
GUI_APP_MAIN
{
teste2().Run();
}
the printer prints the message.
But in a large GUI project I use the same code on a button handler and the printer does not move its printing head...
(In this large project I included also the Report support for printing other things on other menu/button options.)
void CSearchHistory::OnButtonOPrint(void)
{
PrinterJob pj1("History job");
Draw& w1 = pj1;
w1.StartPage();
w1.DrawText(0, 0, "Hello world!", Roman(100));
w1.EndPage();
}
Any ideads to catch the problem?
I put an Exclamation on the method beginning and at method end and i realized that OnButtonOPrint method is executed from the beginning until the end.
By the way, debuging facility on the IDE never worked for me...
Env: win7, Mingw and Upp 2901
Thanks a lot
Alex
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| Re: PrintJob does not works on "large project" [message #30405 is a reply to message #30404] |
Tue, 28 December 2010 17:39  |
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mirek
Messages: 14257
Registered: November 2005
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Ultimate Member |
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| alex100 wrote on Tue, 28 December 2010 09:51 |
Hi all
I have a problem on printing that just happens on a large UPP project I have.
If I compile and execute the following project:
#include "teste2.h"
teste2::teste2()
{
CtrlLayout(*this, "Window title");
btBut <<= THISBACK(OnBut);
}
void teste2::OnBut(void)
{
PrinterJob pj;
Draw& w = pj;
w.StartPage();
w.DrawText(0, 0, "Hello world!", Roman(100));
w.EndPage();
}
GUI_APP_MAIN
{
teste2().Run();
}
the printer prints the message.
But in a large GUI project I use the same code on a button handler and the printer does not move its printing head...
(In this large project I included also the Report support for printing other things on other menu/button options.)
void CSearchHistory::OnButtonOPrint(void)
{
PrinterJob pj1("History job");
Draw& w1 = pj1;
w1.StartPage();
w1.DrawText(0, 0, "Hello world!", Roman(100));
w1.EndPage();
}
Any ideads to catch the problem?
|
First thing that comes to mind is that you have problem with default printer.
Try pj1.Execute() before Draw& .... line to find out.
| Quote: |
By the way, debuging facility on the IDE never worked for me...
Env: win7, Mingw and Upp 2901
|
I strongly recommend avoiding mingw and using free Win7 SDK... Saves a lot of troubles, debugging included, and produces better code too.
Mirek
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| Re: PrintJob does not works on "large project" [message #30509 is a reply to message #30418] |
Wed, 05 January 2011 16:46 |
alex100
Messages: 118
Registered: November 2007
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Experienced Member |
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The problem arises from the code
printjob.cpp
::Execute0
if(!PrintDlg(&dlg))
{
DWORD x= CommDlgExtendedError();
the CommDlgExtendedError returns 0x1008 which means
"A default printer does not exist."
How to solve this?
Again, the following small project runs well...
#include "teste2.h"
teste2::teste2()
{
CtrlLayout(*this, "Window title");
btBut <<= THISBACK(OnBut);
}
void teste2::OnBut(void)
{
PrinterJob pj;
Draw& w = pj;
w.StartPage();
w.DrawText(0, 0, "Hello world!", Roman(100));
w.EndPage();
}
GUI_APP_MAIN
{
teste2().Run();
}
It seems that it is something related with that project/executable...
Thanks
Alex
[Updated on: Wed, 05 January 2011 17:01] Report message to a moderator |
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| Re: PrintJob does not works on "large project" [message #30557 is a reply to message #30509] |
Sat, 08 January 2011 13:15 |
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mirek
Messages: 14257
Registered: November 2005
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Ultimate Member |
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| alex100 wrote on Wed, 05 January 2011 10:46 |
The problem arises from the code
printjob.cpp
::Execute0
if(!PrintDlg(&dlg))
{
DWORD x= CommDlgExtendedError();
the CommDlgExtendedError returns 0x1008 which means
"A default printer does not exist."
How to solve this?
Again, the following small project runs well...
#include "teste2.h"
teste2::teste2()
{
CtrlLayout(*this, "Window title");
btBut <<= THISBACK(OnBut);
}
void teste2::OnBut(void)
{
PrinterJob pj;
Draw& w = pj;
w.StartPage();
w.DrawText(0, 0, "Hello world!", Roman(100));
w.EndPage();
}
GUI_APP_MAIN
{
teste2().Run();
}
It seems that it is something related with that project/executable...
Thanks
Alex
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Well, the general approach I am using in cases like this (you have big project with strange behaviour of unknown source) is to "exclude" the code until it starts working.
E.g. rename "GUI_APP_MAIN" of above code to "DoTest", then put all of that to your project (temorarily) and call DoTest at beginning of your big app GUI_APP_MAIN. If it does not work, there is a bug in global constructor somewhere. If it works ok, start it moving down the code... until it stops - then you have identified what makes the error.
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