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317 lines
9.2 KiB
317 lines
9.2 KiB
15 years ago
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/* Copyright 2004, Daniel Woods Bullok <dan.devel@bullok.com>
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distributed under the terms of the
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GNU GENERAL PUBLIC LICENSE Version 2 -
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See the file kdebase/COPYING for details
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*/
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#include "flowgridmanager.h"
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#include <kdebug.h>
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#ifdef DEBUG
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#define DEBUGSTR kdDebug()
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#else
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#define DEBUGSTR kndDebug()
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#endif
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FlowGridManager::FlowGridManager(QSize p_item_size,
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QSize p_space_size,
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QSize p_border_size,
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QSize p_frame_size,
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Qt::Orientation orient,
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int num_items,
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Slack slack_x,Slack slack_y)
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{
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_pItemSize=p_item_size;
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_pSpaceSize=p_space_size;
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_pBorderSize=p_border_size;
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_pFrameSize=p_frame_size;
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_orientation=orient;
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_numItems=num_items;
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_slackX=slack_x;
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_slackY=slack_y;
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_conserveSpace=false;
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_dirty=true;
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_valid=false;
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}
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// set members.
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// These all set the _dirty flag if the new value is different.
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void FlowGridManager::setNumItems(int num_items)
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{ if (_numItems==num_items)
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return;
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_numItems=num_items; _dirty=true;
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}
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void FlowGridManager::setItemSize(QSize p_item_size)
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{ if (_pItemSize==p_item_size)
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return;
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_pItemSize=p_item_size; _dirty=true;
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}
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void FlowGridManager::setSpaceSize(QSize p_space_size)
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{ if (_pSpaceSize==p_space_size)
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return;
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_pSpaceSize=p_space_size; _dirty=true;
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}
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void FlowGridManager::setBorderSize(QSize p_border_size)
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{ if (_pBorderSize==p_border_size)
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return;
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_pBorderSize=p_border_size; _dirty=true;
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}
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void FlowGridManager::setFrameSize(QSize p_frame_size)
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{ if (_pFrameSize==p_frame_size)
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return;
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_pFrameSize=p_frame_size;
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if (_pFrameSize.width()<=0) {
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_orientation=Qt::Vertical;
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}
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if (_pFrameSize.height()<=0) {
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_orientation=Qt::Horizontal;
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}
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_dirty=true;
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}
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void FlowGridManager::setOrientation(Qt::Orientation orient)
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{ if (orient==_orientation)
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return;
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_orientation=orient; _dirty=true;
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}
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void FlowGridManager::setSlack(Slack slack_x, Slack slack_y)
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{ if (slack_x==_slackX && slack_y==_slackY) return;
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_slackX=slack_x; _slackY=slack_y; _dirty=true;}
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void FlowGridManager::setConserveSpace(bool conserve)
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{ if (_conserveSpace==conserve)
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return;
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_conserveSpace=conserve; _dirty=true;
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}
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// get members
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QSize FlowGridManager::itemSize() const
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{ _checkReconfigure(); return _itemSize;}
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QSize FlowGridManager::spaceSize() const
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{ _checkReconfigure(); return _spaceSize;}
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QSize FlowGridManager::borderSize() const
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{ _checkReconfigure(); return _borderSize;}
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QSize FlowGridManager::gridDim() const
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{ _checkReconfigure(); return _gridDim;}
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QSize FlowGridManager::gridSpacing() const
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{ _checkReconfigure(); return _gridSpacing;}
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QSize FlowGridManager::frameSize() const
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{ _checkReconfigure(); return _frameSize;}
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QPoint FlowGridManager::origin() const
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{ _checkReconfigure(); return _origin;}
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Qt::Orientation FlowGridManager::orientation() const
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{ _checkReconfigure(); return _orientation;}
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/*Slack FlowGridManager::slackX() const
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{ return _slackY;}
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Slack FlowGridManager::slackY() const
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{ return _slackY;}
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*/
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bool FlowGridManager::conserveSpace() const
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{ return _conserveSpace; }
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bool FlowGridManager::isValid() const
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{ _checkReconfigure(); return _valid;}
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QPoint FlowGridManager::posAtCell(int x,int y) const
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{ _checkReconfigure();
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return _origin+QPoint(_gridSpacing.width()*x,_gridSpacing.height()*y);
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}
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QPoint FlowGridManager::pos(int i) const
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{ return posAtCell(cell(i).x(),cell(i).y());
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}
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QPoint FlowGridManager::cell(int index) const
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{ _checkReconfigure();
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//assert((index>=0) && (index<_gridDim.width()*_gridDim.height()));
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int x=index % _gridDim.width(),
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y=index / _gridDim.width();
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return QPoint(x,y);
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}
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// return height if orientation is Horizontal
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// return width if orientation is Vertical
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int FlowGridManager::_getHH(QSize size) const
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{ if (_orientation==Qt::Horizontal)
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return size.height();
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return size.width();
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}
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// return height if orientation is Vertical
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// return width if orientation is Horizontal
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int FlowGridManager::_getWH(QSize size) const
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{ if (_orientation==Qt::Horizontal)
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return size.width();
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return size.height();
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}
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// swap horizontal and vertical if orientation is Vertical, otherwise return arg
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QSize FlowGridManager::_swapHV(QSize hv) const
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{ if (_orientation==Qt::Horizontal)
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return hv;
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QSize temp=hv;
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temp.transpose();
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return temp;
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}
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// return the amount of slack when:
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// nitems = # of items
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// length = total length of space where items will be placed
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// item, space, border = length of respective entities
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int FlowGridManager::_slack(int nitems,int length,int item,int space,int border) const
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{ return length-(2*border)-(nitems-1)*space-nitems*item;}
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void FlowGridManager::_clear() const
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{
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_borderSize=QSize(0,0);
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_spaceSize=QSize(0,0);
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_itemSize=QSize(0,0);
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_gridDim=QSize(0,0);
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_gridSpacing=QSize(0,0);
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_origin=QPoint(0,0);
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_frameSize=QSize(0,0);
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_dirty=false;
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_valid=false;
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}
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int FlowGridManager::indexNearest(QPoint p) const
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{ if (!isValid()) return -1;
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QPoint c=(p-_origin)-QPoint(_spaceSize.width(),_spaceSize.height())/2;
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int x=c.x()/_gridSpacing.width(),
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y=c.y()/_gridSpacing.height();
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int i= x+y*_gridDim.width();
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if (i>_numItems) return -1;
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return i;
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}
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// Redistribute the boxes
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void FlowGridManager::_reconfigure() const
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{ if ((!_pFrameSize.isValid()) ||
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(!_pItemSize.isValid()) ||
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_numItems==0 ) {
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_clear();
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return;
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}
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int height=_getHH(_pFrameSize),
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pItemHeight=_getHH(_pItemSize),
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pSpaceHeight=_getHH(_pSpaceSize),
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pBorderHeight=_getHH(_pBorderSize),
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spanlen=(height-2*pBorderHeight+pSpaceHeight)/(pItemHeight+pSpaceHeight);
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int slack,iSlack;
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if (spanlen==0) {
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_dirty=false;
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_valid=false;
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return;
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}
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// figure out the number of spans required for all items
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int numspans=_numItems/spanlen;
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if (numspans*spanlen<_numItems) {
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numspans++;
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}
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slack=_slack(spanlen,height,pItemHeight,pSpaceHeight,pBorderHeight); // total slack
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iSlack=slack/spanlen; // slack per item
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// Items pick up extra slack
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if (_slackX==ItemSlack) pItemHeight+=iSlack;
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slack=_slack(spanlen,height,pItemHeight,pSpaceHeight,pBorderHeight);
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// space picks up extra slack
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if (spanlen>1) {
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iSlack=slack/(spanlen+1);
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pSpaceHeight+=iSlack;
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}
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slack=_slack(spanlen,height,pItemHeight,pSpaceHeight,pBorderHeight);
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iSlack=slack/2;
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pBorderHeight+=iSlack;
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if (_conserveSpace) {
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_itemSize=_swapHV(QSize(_getWH(_pItemSize),pItemHeight));
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_spaceSize=_swapHV(QSize(_getWH(_pSpaceSize),pSpaceHeight));
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_borderSize=_swapHV(QSize(_getWH(_pBorderSize),pBorderHeight));
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}
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else {
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_itemSize=_swapHV(QSize(pItemHeight,pItemHeight));
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_spaceSize=_swapHV(QSize(pSpaceHeight,pSpaceHeight));
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_borderSize=_swapHV(QSize(pBorderHeight,pBorderHeight));
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}
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_gridDim=_swapHV(QSize(numspans,spanlen));
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_gridSpacing=_itemSize+_spaceSize;
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_origin=QPoint(_borderSize.width(),_borderSize.height());
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_frameSize=2*_borderSize+QSize(_gridDim.width()*_gridSpacing.width()-_spaceSize.width(),
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_gridDim.height()*_gridSpacing.height()-_spaceSize.height());
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_dirty=false;
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_valid=true;
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}
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void FlowGridManager::dump()
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{
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DEBUGSTR<<endl<<flush;
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DEBUGSTR<<"_pItemSize=("<<_pItemSize.width()<<","<<_pItemSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_pSpaceSize=("<<_pSpaceSize.width()<<","<<_pSpaceSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_pBorderSize=("<<_pBorderSize.width()<<","<<_pBorderSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_pFrameSize=("<<_pFrameSize.width()<<","<<_pFrameSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_borderSize=("<<_borderSize.width()<<","<<_borderSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_spaceSize=("<<_spaceSize.width()<<","<<_spaceSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_itemSize=("<<_itemSize.width()<<","<<_itemSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_gridDim=("<<_gridDim.width()<<","<<_gridDim.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_gridSpacing=("<<_gridSpacing.width()<<","<<_gridSpacing.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_origin=("<<_origin.x()<<","<<_origin.y()<<")"<<endl<<flush;
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DEBUGSTR<<"_frameSize=("<<_frameSize.width()<<","<<_frameSize.height()<<")"<<endl<<flush;
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DEBUGSTR<<"_conserveSpace="<<_conserveSpace<<endl<<flush;
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DEBUGSTR<<"_orientation="<<_orientation<<endl<<flush;
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DEBUGSTR<<"_numItems="<<_numItems<<endl<<flush;
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DEBUGSTR<<"_slackX="<<_slackX<<endl<<flush;
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DEBUGSTR<<"_slackY="<<_slackY<<endl<<flush;
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DEBUGSTR<<"_dirty="<<_dirty<<endl<<flush;
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DEBUGSTR<<"_valid="<<_valid<<endl<<flush;
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DEBUGSTR<<endl<<flush;
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}
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bool operator== ( const FlowGridManager & csg1, const FlowGridManager & csg2 )
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{
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return csg1.gridDim()==csg2.gridDim() &&
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csg1.origin()==csg2.origin() &&
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csg1.gridSpacing()==csg2.gridSpacing() &&
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csg1.frameSize()==csg2.frameSize();
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}
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