> I have written a small programm (see below). The scrollbar hesitates
> to work properly.
Did you mean something like this?
This appears to work correctly, as a guess at what you were trying to
achieve...
Built with "fltk2-config --compile test.cxx"
/* w.szukalski fltk2 scroll demo */
#include <stdlib.h>
#include <fltk/run.h>
#include <fltk/draw.h>
#include <fltk/Widget.h>
#include <fltk/Window.h>
#include <fltk/ScrollGroup.h>
#include <fltk/Button.h>
#include <fltk/Box.h>
#include <fltk/Input.h>
#include <fltk/Color.h>
static fltk::Window *win;
static fltk::ScrollGroup *scrollG;
static fltk::Input *inp;
static fltk::Button *but;
class Canvas : public fltk::Widget {
void draw();
public:
Canvas(int X,int Y,int W,int H) : fltk::Widget(X,Y,W,H)
{
box(fltk::FLAT_BOX);
}
};
void Canvas::draw() {
fltk::setfont(fltk::HELVETICA, h());
fltk::setcolor(fltk::RED);
fltk::drawtext("A", fltk::Rectangle(w(),h()),
fltk::ALIGN_CENTER);
}
static Canvas *canvas;
void cancel_cb(fltk::Widget* o, void*) {
win->hide();
}
int main(int argc, char** argv) {
win = new fltk::Window(417,340);
win->begin();
scrollG = new fltk::ScrollGroup(0,0,400,300);
scrollG->begin();
canvas = new Canvas(0,0,400,375);
int X = 10, Y = 320;
inp = new fltk::Input(X, Y, 100, 25);
inp->text("HELLO");
X += 110;
but = new fltk::Button(X, Y, 50,25);
but->copy_label("But");
scrollG->end();
scrollG->type(fltk::ScrollGroup::VERTICAL);//scrollbar type
scrollG->box(fltk::DOWN_BOX);
win->begin();
fltk::Button *b = new fltk::Button(50, 310, 60, 25, "Cancel");
b->callback(cancel_cb);
win->resizable(scrollG);
win->end();
win->show();
return fltk::run();
}
/* end of file */
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