On 18.10.2010, at 12:49, Paul R wrote:
I first got the seg fault calling activate() on the input fields directly
within the callback for the button., i only added the reset function to try and
get around the issue or simply see if any difference.
will this seg fault be heirarchy related also do you think ?
Yes, it's the same for both callbacks (BTW. Ian, well-done,
I overlooked that inheritance issue at the first look).
I append a modified and completetd version of your program,
with all (I hope) essential changes marked with "***". I tried
to do only minimal changes w/o rewriting the widget hierarchy,
as Ian did. You may compare both versions and see what fits
your intentions better (no competition intended ;-) ).
Mainly I changed parent() to window(), so that you could later
add intermediate groups w/o needing to change the program. Since
the window can't be cast to SetupTest, I stored the "this" pointer
in the window's user_data() member. That's not how I would do it
in a working program, however, it's just to show how it *could*
be done. YMMV.
Albrecht
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Int_Input.H>
#include <stdlib.h>
#include <stdio.h>
class SetupTest
{
public:
Fl_Window* SetupWindow;
Fl_Button* ResetButton; // ***
Fl_Int_Input *inputA;
Fl_Int_Input *inputB;
bool state;
int valCount;
void InputCb_i(Fl_Widget* wgt, void* v);
static void InputCb(Fl_Widget* wgt, void* v);
void ButtonCb_i(Fl_Widget* wgt, void* v);
static void ButtonCb(Fl_Widget* wgt, void* v);
void Reset();
SetupTest();
};
SetupTest::SetupTest()
{
SetupWindow = new Fl_Window(300, 200);
SetupWindow->user_data(this); // ***
ResetButton = new Fl_Button(226, 20, 64, 20, "Reset"); // ***
inputA = new Fl_Int_Input(215, 50, 20, 24, "InputA");
inputA->tooltip("enter number A");
inputA->type(2);
inputA->when(FL_WHEN_RELEASE);
inputB = new Fl_Int_Input(215, 80, 20, 24, "InputB");
inputB->tooltip("enter number B");
inputB->type(2);
inputB->when(FL_WHEN_RELEASE);
valCount = 0;
state = false;
inputA->callback((Fl_Callback*) InputCb);
inputB->callback((Fl_Callback*) InputCb);
ResetButton->callback((Fl_Callback*) ButtonCb);
SetupWindow->end ();
SetupWindow->show ();
}
void SetupTest::InputCb_i(Fl_Widget* w, void* v)
{
Fl_Int_Input* inp = (Fl_Int_Input*) w;
char* p;
long int longI = 0;
if (inp->changed())
{
inp->clear_changed();
longI = strtol(inp->value(), &p, 10);
printf("%s '%s'\n",inp->label(),inp->value());
printf("%ld\n",longI);
inp->deactivate();
valCount++;
}
if(valCount == 2)
{
printf("READY\n");
valCount = 0;
}
}
void SetupTest::InputCb(Fl_Widget* wgt, void* v)
{
((SetupTest*)(wgt->window()->user_data()))->InputCb_i(wgt, v); // ***
}
void SetupTest::ButtonCb_i(Fl_Widget* w, void* v)
{
Fl_Button* button = (Fl_Button*) w;
if(!state)
{
Reset();
state = true;
}
else
state = false;
}
void SetupTest::ButtonCb(Fl_Widget* wgt, void* v)
{
((SetupTest*)(wgt->window()->user_data()))->ButtonCb_i(wgt, v); // ***
}
void SetupTest::Reset()
{
printf("Reset!\n");
inputB->activate();
inputA->activate();
}
int main (int argc, char ** argv)
{
setvbuf (stdout,NULL,_IONBF,0); // stdout unbuffered for Cygwin/MinGW
SetupTest testObj;
return(Fl::run());
}
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