// widgetSpacer.c  -- Spacer widget (invisible stretching element)
//
// A zero-sized invisible widget with weight=100, used purely for
// layout control. It absorbs leftover space in box layouts, pushing
// sibling widgets apart. Common use: place a spacer between buttons
// in a toolbar to right-align some buttons, or between a label and
// a control to create elastic spacing.
//
// Because calcMinSize returns 0x0, the spacer takes no space when
// there is none to spare, but greedily absorbs extra space via its
// weight. This is the simplest possible layout primitive -- no paint,
// no mouse, no keyboard, no state. The entire widget is effectively
// just a weight value attached to a position in the sibling list.

#include "widgetInternal.h"


// ============================================================
// wgtSpacer
// ============================================================

WidgetT *wgtSpacer(WidgetT *parent) {
    WidgetT *w = widgetAlloc(parent, WidgetSpacerE);

    if (w) {
        w->weight = 100;  // spacers stretch by default
    }

    return w;
}


// ============================================================
// widgetSpacerCalcMinSize
// ============================================================

void widgetSpacerCalcMinSize(WidgetT *w, const BitmapFontT *font) {
    (void)font;
    w->calcMinW = 0;
    w->calcMinH = 0;
}