On 14.05.2012 20:41, Albrecht Schlosser wrote:
> (2) rb (resize-box) was added to maintain the other widgets's sizes.
I just checked another idea: instead of adding the resize box, just
disable the group's own resizing by setting the group's resizable()
to NULL.
... well, then you can also remove the init_sizes() call, and the
statement `group->redraw()` seems to be unnecessary as well.
After all, there's not much I changed for a working sample code.
Essentially it's the top-left box for Fl_Scroll spacing, setting
the group's resizable() to NULL, and adding one redraw() call.
Does this (see inline code below) work for you?
Albrecht
// asker.h
#ifndef ASKER_H
#define ASKER_H
#include <FL/Fl_Pack.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Box.H>
#include <FL/fl_ask.H>
template <class T>
class Asker : public Fl_Pack
{
public:
Asker(int a, int b, int c, int d, const char * itemName, int s);
private:
Fl_Button * addButton;
static void add_cb( Fl_Widget * button, void * a );
int s;
int d;
};
template <class T>
Asker<T>::Asker(int a, int b, int c, int d2, const char * itemName, int
s2) : Fl_Pack( a, b, c, d2 ) , s(s2), d(d2)
{
add(addButton = new Fl_Button( a, b, c, d, itemName)); // Creates the
gen button
addButton->callback((Fl_Callback*) add_cb, this ); // Creates the
gen callback
end();
spacing(s);
}
template <class T>
void Asker<T>::add_cb( Fl_Widget * button, void * a ) {
Asker<T> * asker = ( Asker<T> * ) a; // Gets the caller
Fl_Group *group = (Fl_Group *)asker->parent(); // parent =
Fl_Group (!)
Fl_Scroll *scroll = (Fl_Scroll *)group->parent(); // group's parent =
Fl_Scroll (!)
T * newWidget = new T(0 , 0 , 0 ,asker->d); // Creates the new
widget, only height matters because Fl_Pack
asker->insert(*newWidget, 0); // Inserts the new
Widget on top
group->size(group->w(), group->h() + asker->d + asker->s ); //
Increases the Height of the parent by the new Widget + 1 Spacing
scroll->redraw(); // MUST BE DONE
}
#endif // ASKER_H
// end of asker.h
//----------------------------------------------------------
// asker.cxx
// (MAIN.CPP)
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Scroll.H>
#include <FL/Fl_Input.H>
#include "asker.h"
int main(int argc, char **argv) {
Fl_Window *window = new Fl_Window(340,400);
Fl_Scroll *Z = new Fl_Scroll(0,0,340,400);
Fl_Box * top_box = new Fl_Box(0,0,3,3); // to keep spacing in
Fl_Scroll
// top_box->color(FL_RED); top_box->box(FL_FLAT_BOX); // make it
visible (comment this out!)
Fl_Group * A = new Fl_Group(20,40,300,300,"A");
A->resizable(0); // needed to keep the other widgets in their original
sizes
Fl_Input * A1 = new Fl_Input( 30, 50, 280, 40, "A1" );
Asker<Fl_Input> * B = new Asker<Fl_Input>(30, 100, 280, 40, "TEST",
10 ); // Each Input will be 40 height, spacing is 10
A->end();
A->box(FL_UP_BOX);
Z->end();
window->end();
window->resizable(window);
window->show(argc, argv);
return Fl::run();
}
// end of asker.cxx
//----------------------------------------------------------
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