addscrollbars.cpp

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

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#include <qobjectlist.h>
#include <qwidgetstack.h>
#include <qwidgetlist.h>
#include <qscrollview.h>
#include <qtabwidget.h>

static void addScrollBars(QTabWidget* tw)
{
    // Put a scrollbar on every page.
    // Reasonably general. Works for QTabWidgets from Qt Designer.

    QWidgetStack* stack = (QWidgetStack*)tw->child(0,"QWidgetStack");

    const QObjectList *tabs = stack->children();
    if (tabs) {
	QObject *o;
	QWidgetList pages;
	QObjectListIt oi(*tabs);
	for (; (o = *oi); ++oi) {
	    if (o->isWidgetType() && strcmp(o->className(),"QWidgetStackPrivate::Invisible")!=0)
		pages.append((QWidget*)o);
	}
	QWidget *w;
	QStringList pagelabs;
	QWidget *v = tw->currentPage();
	for (QWidgetListIt wi(pages); (w = *wi); ++wi) {
	    pagelabs.append(tw->tabLabel(w));
	    tw->removePage(w);
	}
	QStringList::ConstIterator li = pagelabs.begin();
	for (QWidgetListIt wi(pages); (w = *wi); ++wi) {
	    QScrollView* sv = new QScrollView(stack,w->name()); // Move name (so hide magic still works)
	    w->setName(0);
	    sv->setFrameStyle(QFrame::NoFrame);
	    sv->setResizePolicy(QScrollView::AutoOneFit);
	    sv->addChild(w);
	    tw->addTab(sv,*li); ++li;
	    if ( w == v )
		v = sv;
	}
	if ( v )
	    tw->showPage(v);
    }
}