On 04/03/12 09:52, Robert Arkiletian wrote:
> Question from a student I could not answer:
>
> Want to have 3 horiz groups in a window.
>
> -top group resizes both horiz and vert
> -middle group resizes only horiz
> -bottom group resizes both horiz and vert
>
> So the top and bottom will always be the same size.
> Middle group height remains constant.
>
> Possible?
There might be a way to do it with a combo of group resizables, but
I'd take the route of doing custom resize() calculations myself..
see the MyThreeGroups::resize() method below:
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Button.H>
#include <FL/Fl_Box.H>
//
// Demonstrate 3 groups with custom sizing - erco 04/03/12
//
// 3 horiz groups in a window.
// -top group resizes both horiz and vert
// -middle group resizes only horiz
// -bottom group resizes both horiz and vert
// So the top and bottom will always be the same size.
// Middle group height remains constant.
//
void MakeFourButtons(int X,int Y,int W,int H) {
new Fl_Button(X+20, Y+20, 100,25,"A");
new Fl_Button(X+W-20-100,Y+20, 100,25,"B");
new Fl_Button(X+20, Y+H-20-25,100,25,"C");
new Fl_Button(X+W-20-100,Y+H-20-25,100,25,"D");
}
class MyThreeGroups : public Fl_Group {
Fl_Group *top;
Fl_Group *mid;
Fl_Group *bot;
public:
MyThreeGroups(int X,int Y,int W,int H) : Fl_Group(X,Y,W,H) {
Fl_Align center = FL_ALIGN_CENTER|FL_ALIGN_INSIDE;
top = new Fl_Group(0, 0,300,150,"Top"); top->align(center);
top->box(FL_FLAT_BOX); top->color(45); top->begin();
MakeFourButtons(top->x(), top->y(), top->w(), top->h());
top->end();
mid = new Fl_Group(0,150,300,150,"Mid"); mid->align(center);
mid->box(FL_FLAT_BOX); mid->color(47); mid->begin();
MakeFourButtons(mid->x(), mid->y(), mid->w(), mid->h());
mid->end();
bot = new Fl_Group(0,300,300,150,"Bot"); bot->align(center);
bot->box(FL_FLAT_BOX); bot->color(49); bot->begin();
MakeFourButtons(bot->x(), bot->y(), bot->w(), bot->h());
bot->end();
}
// CUSTOM RESIZE CODE FOR TOP/MID/BOT SIZING
void resize(int X,int Y,int W,int H) {
// Calculate height of top+bottom groups
int tbh = (H-mid->h())/2;
// Calculate y positions for top/mid/bot
int top_y = Y;
int mid_y = Y+tbh;
int bot_y = mid_y+mid->h();
// Apply new sizes
top->resize(X,top_y,W,tbh);
mid->resize(X,mid_y,W,mid->h());
bot->resize(X,bot_y,W,tbh);
// Children were repositioned
init_sizes();
}
};
int main() {
Fl_Window win(300,450);
win.begin();
MyThreeGroups grp(0,0,300,450);
win.end();
win.resizable(grp);
win.show();
return(Fl::run());
}
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