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452 lines
14 KiB
452 lines
14 KiB
/* This file is part of the KDE project
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Copyright (C) 2005 Cedric Pasteur <cedric.pasteur@free.fr>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "kexiflowlayout.h"
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#include <kdebug.h>
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/// Iterator class
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class KexiFlowLayoutIterator : public TQGLayoutIterator
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{
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public:
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KexiFlowLayoutIterator( TQPtrList<TQLayoutItem> *list )
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: m_idx(0), m_list( list )
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{}
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uint count() const;
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TQLayoutItem *current();
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TQLayoutItem *next();
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TQLayoutItem *takeCurrent();
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private:
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int m_idx;
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TQPtrList<TQLayoutItem> *m_list;
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};
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uint
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KexiFlowLayoutIterator::count() const
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{
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return m_list->count();
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}
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TQLayoutItem *
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KexiFlowLayoutIterator::current()
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{
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return (m_idx < (int)count()) ? m_list->at(m_idx) : 0;
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}
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TQLayoutItem *
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KexiFlowLayoutIterator::next()
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{
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m_idx++;
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return current();
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}
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TQLayoutItem *
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KexiFlowLayoutIterator::takeCurrent()
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{
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return (m_idx < (int)count()) ? m_list->take(m_idx) : 0;
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}
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//// The layout itself
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KexiFlowLayout::KexiFlowLayout(TQWidget *parent, int border, int space, const char *name)
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: TQLayout(parent, border, space, name)
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{
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m_orientation =Qt::Horizontal;
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m_justify = false;
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m_cached_width = 0;
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}
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KexiFlowLayout::KexiFlowLayout(TQLayout* parent, int space, const char *name)
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: TQLayout( parent, space, name )
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{
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m_orientation =Qt::Horizontal;
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m_justify = false;
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m_cached_width = 0;
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}
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KexiFlowLayout::KexiFlowLayout(int space, const char *name)
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: TQLayout(space, name)
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{
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m_orientation =Qt::Horizontal;
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m_justify = false;
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m_cached_width = 0;
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}
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KexiFlowLayout::~KexiFlowLayout()
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{
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deleteAllItems();
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}
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void
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KexiFlowLayout::addItem(TQLayoutItem *item)
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{
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m_list.append(TQT_TQLAYOUTITEM(item));
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}
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void
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KexiFlowLayout::addSpacing(int size)
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{
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if (m_orientation ==Qt::Horizontal)
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addItem( TQT_TQLAYOUTITEM(new TQSpacerItem( size, 0, TQSizePolicy::Fixed, TQSizePolicy::Minimum )) );
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else
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addItem( TQT_TQLAYOUTITEM(new TQSpacerItem( 0, size, TQSizePolicy::Minimum, TQSizePolicy::Fixed )) );
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}
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TQLayoutIterator
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KexiFlowLayout::iterator()
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{
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return TQLayoutIterator( new KexiFlowLayoutIterator(&m_list) );
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}
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TQPtrList<TQWidget>*
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KexiFlowLayout::widgetList() const
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{
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TQPtrList<TQWidget> *list = new TQPtrList<TQWidget>();
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for (TQPtrListIterator<TQLayoutItem> it(m_list); it.current(); ++it) {
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if(it.current()->widget())
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list->append(it.current()->widget());
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}
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return list;
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}
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void
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KexiFlowLayout::invalidate()
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{
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TQLayout::invalidate();
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m_cached_sizeHint = TQSize();
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m_cached_minSize = TQSize();
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m_cached_width = 0;
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}
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bool
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KexiFlowLayout::isEmpty()
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{
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return m_list.isEmpty();
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}
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bool
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KexiFlowLayout::hasHeightForWidth() const
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{
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return (m_orientation ==Qt::Horizontal);
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}
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int
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KexiFlowLayout::heightForWidth(int w) const
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{
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if(m_cached_width != w) {
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// workaround to allow this method to stay 'const'
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KexiFlowLayout *mthis = (KexiFlowLayout*)this;
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int h = mthis->simulateLayout( TQRect(0,0,w,0) );
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mthis->m_cached_hfw = h;
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mthis->m_cached_width = w;
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return h;
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}
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return m_cached_hfw;
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}
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TQSize
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KexiFlowLayout::sizeHint() const
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{
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if(m_cached_sizeHint.isEmpty()) {
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KexiFlowLayout *mthis = (KexiFlowLayout*)this;
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TQRect r = TQRect(0, 0, 2000, 2000);
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mthis->simulateLayout(r);
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}
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return m_cached_sizeHint;
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}
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TQSize
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KexiFlowLayout::minimumSize() const
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{
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//js: do we really need to simulate layout here?
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// I commented this out because it was impossible to stretch layout conveniently.
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// Now, minimum size is computed automatically based on item's minimumSize...
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#if 0
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if(m_cached_minSize.isEmpty()) {
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KexiFlowLayout *mthis = (KexiFlowLayout*)this;
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TQRect r = TQRect(0, 0, 2000, 2000);
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mthis->simulateLayout(r);
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}
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#endif
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return m_cached_minSize;
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}
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TQSizePolicy::ExpandData
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KexiFlowLayout::expanding() const
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{
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if(m_orientation == Qt::Vertical)
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return TQSizePolicy::Vertically;
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else
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return TQSizePolicy::Horizontally;
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}
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void
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KexiFlowLayout::setGeometry(const TQRect &r)
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{
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TQLayout::setGeometry(r);
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if(m_orientation ==Qt::Horizontal)
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doHorizontalLayout(r);
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else
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doVerticalLayout(r);
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}
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int
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KexiFlowLayout::simulateLayout(const TQRect &r)
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{
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if(m_orientation ==Qt::Horizontal)
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return doHorizontalLayout(r, true);
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else
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return doVerticalLayout(r, true);
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}
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int
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KexiFlowLayout::doHorizontalLayout(const TQRect &r, bool testOnly)
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{
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int x = r.x();
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int y = r.y();
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int h = 0; // height of this line
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int availableSpace = r.width() + spacing();
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int expandingWidgets=0; // number of widgets in the line with TQSizePolicy == Expanding
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TQPtrListIterator<TQLayoutItem> it(m_list);
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TQPtrList<TQLayoutItem> currentLine;
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TQLayoutItem *o;
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TQSize minSize, sizeHint(20, 20);
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int minSizeHeight = 0 - spacing();
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while ( (o = it.current()) != 0 ) {
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if(o->isEmpty()) { /// do not consider hidden widgets
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++it;
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continue;
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}
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// kdDebug() << "- doHorizontalLayout(): " << o->widget()->className() << " " << o->widget()->name() << endl;
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TQSize oSizeHint = o->sizeHint(); // we cache these ones because it can take a while to get it (eg for child layouts)
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if ((x + oSizeHint.width()) > r.right() && h > 0) {
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// do the layout of current line
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TQPtrListIterator<TQLayoutItem> it2(currentLine);
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TQLayoutItem *item;
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int wx = r.x();
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int sizeHintWidth = 0 -spacing(), minSizeWidth=0 - spacing(), lineMinHeight=0;
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while( (item = it2.current()) != 0 ) {
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TQSize itemSizeHint = item->sizeHint(); // we cache these ones because it can take
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TQSize itemMinSize = item->minimumSize(); // a while to get them
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TQSize s;
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if(m_justify) {
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if(expandingWidgets != 0) {
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if(item->expanding() == TQSizePolicy::Horizontally || item->expanding() == TQSizePolicy::BothDirections)
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s = TQSize( TQMIN(itemSizeHint.width() + availableSpace / expandingWidgets
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, r.width()), itemSizeHint.height() );
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else
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s = TQSize( TQMIN(itemSizeHint.width(), r.width()), itemSizeHint.height() );
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}
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else
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s = TQSize( TQMIN(itemSizeHint.width() + availableSpace / (int)currentLine.count()
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, r.width()), itemSizeHint.height() );
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}
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else
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s = TQSize ( TQMIN(itemSizeHint.width(), r.width()), itemSizeHint.height() );
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if(!testOnly)
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item->setGeometry( TQRect(TQPoint(wx, y), s) );
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wx = wx + s.width() + spacing();
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minSizeWidth = minSizeWidth + spacing() + itemMinSize.width();
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sizeHintWidth = sizeHintWidth + spacing() + itemSizeHint.width();
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lineMinHeight = TQMAX( lineMinHeight, itemMinSize.height() );
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++it2;
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}
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sizeHint = sizeHint.expandedTo( TQSize(sizeHintWidth, 0) );
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minSize = minSize.expandedTo( TQSize(minSizeWidth, 0) );
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minSizeHeight = minSizeHeight + spacing() + lineMinHeight;
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// start a new line
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y = y + spacing() + h;
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h = 0;
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x = r.x();
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currentLine.clear();
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expandingWidgets = 0;
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availableSpace = r.width() + spacing();
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}
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x = x + spacing() + oSizeHint.width();
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h = TQMAX( h, oSizeHint.height() );
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currentLine.append(o);
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if(o->expanding() == TQSizePolicy::Horizontally || o->expanding() == TQSizePolicy::BothDirections)
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++expandingWidgets;
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availableSpace = TQMAX(0, availableSpace - spacing() - oSizeHint.width());
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++it;
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}
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// don't forget to layout the last line
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TQPtrListIterator<TQLayoutItem> it2(currentLine);
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TQLayoutItem *item;
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int wx = r.x();
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int sizeHintWidth = 0 -spacing(), minSizeWidth=0 - spacing(), lineMinHeight=0;
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while( (item = it2.current()) != 0 ) {
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TQSize itemSizeHint = item->sizeHint(); // we cache these ones because it can take
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TQSize itemMinSize = item->minimumSize(); // a while to get them
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TQSize s;
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if(m_justify) {
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if(expandingWidgets != 0) {
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if(item->expanding() == TQSizePolicy::Horizontally || item->expanding() == TQSizePolicy::BothDirections)
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s = TQSize( TQMIN(itemSizeHint.width() + availableSpace / expandingWidgets
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, r.width()), itemSizeHint.height() );
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else
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s = TQSize( TQMIN(itemSizeHint.width(), r.width()), itemSizeHint.height() );
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}
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else
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s = TQSize( TQMIN(itemSizeHint.width() + availableSpace / (int)currentLine.count()
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, r.width()), itemSizeHint.height() );
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}
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else
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s = TQSize ( TQMIN(itemSizeHint.width(), r.width()), itemSizeHint.height() );
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if(!testOnly)
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item->setGeometry( TQRect(TQPoint(wx, y), s) );
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wx = wx + s.width() + spacing();
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minSizeWidth = minSizeWidth + spacing() + itemMinSize.width();
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sizeHintWidth = sizeHintWidth + spacing() + itemSizeHint.width();
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lineMinHeight = TQMAX( lineMinHeight, itemMinSize.height() );
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++it2;
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}
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sizeHint = sizeHint.expandedTo( TQSize(sizeHintWidth, y + spacing() + h) );
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minSizeHeight = minSizeHeight + spacing() + lineMinHeight;
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minSize = minSize.expandedTo( TQSize(minSizeWidth, minSizeHeight) );
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// store sizeHint() and minimumSize()
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m_cached_sizeHint = sizeHint + TQSize(2* margin(), 2*margin());
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m_cached_minSize = minSize + TQSize(2* margin() , 2*margin());
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// return our height
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return y + h - r.y();
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}
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int
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KexiFlowLayout::doVerticalLayout(const TQRect &r, bool testOnly)
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{
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int x = r.x();
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int y = r.y();
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int w = 0; // width of this line
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int availableSpace = r.height() + spacing();
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int expandingWidgets=0; // number of widgets in the line with TQSizePolicy == Expanding
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TQPtrListIterator<TQLayoutItem> it(m_list);
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TQPtrList<TQLayoutItem> currentLine;
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TQLayoutItem *o;
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TQSize minSize, sizeHint(20, 20);
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int minSizeWidth = 0 - spacing();
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while ( (o = it.current()) != 0 ) {
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if(o->isEmpty()) { /// do not consider hidden widgets
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++it;
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continue;
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}
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TQSize oSizeHint = o->sizeHint(); // we cache these ones because it can take a while to get it (eg for child layouts)
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if (y + oSizeHint.height() > r.bottom() && w > 0) {
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// do the layout of current line
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TQPtrListIterator<TQLayoutItem> it2(currentLine);
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TQLayoutItem *item;
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int wy = r.y();
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int sizeHintHeight = 0 - spacing(), minSizeHeight = 0 - spacing(), colMinWidth=0;
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while( (item = it2.current()) != 0 ) {
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TQSize itemSizeHint = item->sizeHint(); // we cache these ones because it can take
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TQSize itemMinSize = item->minimumSize(); // a while to get them
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TQSize s;
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if(m_justify) {
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if(expandingWidgets != 0) {
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if(item->expanding() == TQSizePolicy::Vertically || item->expanding() == TQSizePolicy::BothDirections)
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s = TQSize( itemSizeHint.width(), TQMIN(itemSizeHint.height() + availableSpace / expandingWidgets
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, r.height()) );
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else
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s = TQSize( itemSizeHint.width(), TQMIN(itemSizeHint.height(), r.height()) );
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}
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else
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s = TQSize( itemSizeHint.width(), TQMIN(itemSizeHint.height() + availableSpace / (int)currentLine.count()
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, r.height()) );
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}
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else
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s = TQSize ( itemSizeHint.width(), TQMIN(itemSizeHint.height(), r.height()) );
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if(!testOnly)
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item->setGeometry( TQRect(TQPoint(x, wy), s) );
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wy = wy + s.height() + spacing();
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minSizeHeight = minSizeHeight + spacing() + itemMinSize.height();
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sizeHintHeight = sizeHintHeight + spacing() + itemSizeHint.height();
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colMinWidth = TQMAX( colMinWidth, itemMinSize.width() );
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++it2;
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}
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sizeHint = sizeHint.expandedTo( TQSize(0, sizeHintHeight) );
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minSize = minSize.expandedTo( TQSize(0, minSizeHeight) );
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minSizeWidth = minSizeWidth + spacing() + colMinWidth;
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// start a new column
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x = x + spacing() + w;
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w = 0;
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y = r.y();
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currentLine.clear();
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expandingWidgets = 0;
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availableSpace = r.height() + spacing();
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}
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y = y + spacing() + oSizeHint.height();
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w = TQMAX( w, oSizeHint.width() );
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currentLine.append(o);
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if(o->expanding() == TQSizePolicy::Vertically || o->expanding() == TQSizePolicy::BothDirections)
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++expandingWidgets;
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availableSpace = TQMAX(0, availableSpace - spacing() - oSizeHint.height());
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++it;
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}
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// don't forget to layout the last line
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TQPtrListIterator<TQLayoutItem> it2(currentLine);
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TQLayoutItem *item;
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int wy = r.y();
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int sizeHintHeight = 0 - spacing(), minSizeHeight = 0 - spacing(), colMinWidth=0;
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while( (item = it2.current()) != 0 ) {
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TQSize itemSizeHint = item->sizeHint(); // we cache these ones because it can take
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TQSize itemMinSize = item->minimumSize(); // a while to get them
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TQSize s;
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if(m_justify) {
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if(expandingWidgets != 0) {
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if(item->expanding() == TQSizePolicy::Vertically || item->expanding() == TQSizePolicy::BothDirections)
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s = TQSize( itemSizeHint.width(), TQMIN(itemSizeHint.height() + availableSpace / expandingWidgets
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, r.height()) );
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else
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s = TQSize( itemSizeHint.width(), TQMIN(itemSizeHint.height(), r.height()) );
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}
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else
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s = TQSize( itemSizeHint.width(), TQMIN(itemSizeHint.height() + availableSpace / (int)currentLine.count()
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, r.height()) );
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}
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else
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s = TQSize ( itemSizeHint.width(), TQMIN(itemSizeHint.height(), r.height()) );
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if(!testOnly)
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item->setGeometry( TQRect(TQPoint(x, wy), s) );
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wy = wy + s.height() + spacing();
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minSizeHeight = minSizeHeight + spacing() + itemMinSize.height();
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sizeHintHeight = sizeHintHeight + spacing() + itemSizeHint.height();
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colMinWidth = TQMAX( colMinWidth, itemMinSize.width() );
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++it2;
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}
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sizeHint = sizeHint.expandedTo( TQSize( x + spacing() + w, sizeHintHeight) );
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minSizeWidth = minSizeWidth + spacing() + colMinWidth;
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minSize = minSize.expandedTo( TQSize(minSizeWidth, minSizeHeight) );
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// store sizeHint() and minimumSize()
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m_cached_sizeHint = sizeHint + TQSize(2* margin(), 2*margin());
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m_cached_minSize = minSize + TQSize(2* margin(), 2*margin());
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// return our width
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return x + w - r.x();
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}
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