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painttree_one.cpp
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painttree_one.cpp
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#include "painttree_one.h"
#include <QPainter>
#include <QPixmap>
int paintTree_one::iCount;//已经画出的步骤
paintTree_one::paintTree_one(QWidget *parent) :
QFrame(parent)
{
this->iCount=-1;
this->setStyleSheet ("border: 1px solid gray;background-color:white"); //设置边框颜色
// this->setAutoFillBackground(true);
// this->setPalette(Qt::white); //背景色为白色
}
void paintTree_one::paintEvent(QPaintEvent *event)
{
paintNext();//画下一步
}
void paintTree_one::resizeEvent(QResizeEvent *event) //获得子控件大小,随窗口变化而变化
{
iWidth=this->width();//画图窗口宽度
iHeight=this->height();//画图窗口高度
//this->resize(QSize(iWidth,iHeight));
}
QString paintTree_one::charToName(char &cCh)
{
QString temp;
if(cCh>='a'&&cCh<='e')
temp.sprintf(":/image/lowercase/%c.png",cCh);
else
temp.sprintf(":/image/uppercase/%c.png",cCh);
return temp;
}
void paintTree_one::setTreeNode(treeNode *t)
{
this->m_tree=t;
}
void paintTree_one::paintNext()
{
vector<Node> nTemp;
nTemp=this->m_tree->tree;
int space_x, space_y;
int lowCount=0;//树中出现终结符的个数，方便计算空间间隔宽度
int upCount=0;//树中出现终结符的个数，方便计算空间间隔高度
for(int j=nTemp.size()-1;j>=0;j--)
{
if(nTemp[j].y==0)
{
lowCount=nTemp[j].x+1;//x坐标从0开始的，所以要加一
break;
}
else
{
lowCount=0;
continue;
}
}
for(int j=nTemp.size()-1;j>=0;j--)
{
char temp=nTemp[j].key;
if(temp=='A' || temp=='B' || temp=='S' )
{
upCount=nTemp[j].y+1; //y坐标从0开始的，所以要加一
break;
}
else
{
upCount=0;
continue;
}
}
// int space_x=iWidth/(lowCount+1);//横向间隔
// int space_y=iHeight/(upCount+1);//纵向间隔
space_x=iWidth/(lowCount+1);//横向间隔
if(upCount==0)
space_y=iHeight/3;
else
space_y=iHeight/(upCount+1);//纵向间隔
QString fileName;
QPainter painter;
//QPen pen;
//pen.setWidth(2);//设置线的宽度为2个像素
int currentX;
int currentY;
int x,y,nY;
if(iCount<nTemp.size()&&iCount>=0)
{
for(int i=0;i<=iCount;i++)
{
painter.begin(this);
//painter.setPen(pen);
fileName=charToName(nTemp[i].key);
currentX=space_x*(nTemp[i].x+1);
currentY=iHeight-space_y*(nTemp[i].y+1);
QPixmap picture;
picture.load(fileName);
// painter.drawPixmap(currentX,currentY,picture);
if(nTemp[i].key=='A')//画A->Ab或A->b的直线
{
if(nTemp[i].y>1)
{
painter.drawPixmap(currentX,currentY,picture);
painter.drawLine(space_x*(nTemp[i-2].x+1)+16,iHeight-space_y*(nTemp[i-2].y+1)+16,currentX+16,currentY+16);
painter.drawLine(space_x*(nTemp[i-1].x+1)+16,iHeight-space_y*(nTemp[i-1].y+1)+16,currentX+16,currentY+16);
painter.end();
}
else
{
painter.drawPixmap(currentX,currentY,picture);
painter.drawLine(currentX+16,currentY+space_y*nTemp[i].y+16,currentX+16,currentY+16);
painter.end();
}
}
else if(nTemp[i].key=='B')//画B->d的直线
{
findXY('A',x,y);
nY=y;
painter.drawPixmap(currentX,iHeight-space_y*(nY+1),picture);
painter.drawLine(currentX+16,currentY+space_y*nTemp[i].y+16,currentX+16,iHeight-space_y*(nY+1)+16);
painter.end();
}
else if(nTemp[i].key=='S')//画S->aAcBe的所有直线
{
painter.drawPixmap(currentX,currentY,picture);
findXY('A',x,y);
nY=y;
findXY('a',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,currentX+16,currentY+16);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,space_x*(x+1)+16,iHeight-space_y*(y+1)+16);
findXY('A',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(y+1)+16,currentX+16,currentY+16);
findXY('c',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(y+1)+16,currentX+16,currentY+16);
findXY('B',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,currentX+16,currentY+16);
findXY('e',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,currentX+16,currentY+16);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,space_x*(x+1)+16,iHeight-space_y*(y+1)+16);
painter.end();
}
else
{
painter.drawPixmap(currentX,currentY,picture);
painter.end();
}
}
}
else if(iCount>=0)
{
painter.begin(this);
for(int i=0;i<=nTemp.size();i++)
{
fileName=charToName(nTemp[i].key);
currentX=space_x*(nTemp[i].x+1);
currentY=iHeight-space_y*(nTemp[i].y+1);
QPixmap picture;
picture.load(fileName);
// painter.drawPixmap(currentX,currentY,picture);
if(nTemp[i].key=='A')//画A->Ab或A->b的直线
{
if(nTemp[i].y>1)
{
painter.drawPixmap(currentX,currentY,picture);
painter.drawLine(space_x*(nTemp[i-2].x+1)+16,iHeight-space_y*(nTemp[i-2].y+1)+16,currentX+16,currentY+16);
painter.drawLine(space_x*(nTemp[i-1].x+1)+16,iHeight-space_y*(nTemp[i-1].y+1)+16,currentX+16,currentY+16);
}
else
{
painter.drawPixmap(currentX,currentY,picture);
painter.drawLine(currentX+16,currentY+space_y*nTemp[i].y+16,currentX+16,currentY+16);
}
}
else if(nTemp[i].key=='B')//画B->d的直线
{
findXY('A',x,y);
nY=y;
painter.drawPixmap(currentX,iHeight-space_y*(nY+1),picture);
painter.drawLine(currentX+16,currentY+space_y*nTemp[i].y+16,currentX+16,iHeight-space_y*(nY+1)+16);
}
else if(nTemp[i].key=='S')//画S->aAcBe的所有直线
{
painter.drawPixmap(currentX,currentY,picture);
findXY('A',x,y);
nY=y;
findXY('a',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,currentX+16,currentY+16);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,space_x*(x+1)+16,iHeight-space_y*(y+1)+16);
findXY('A',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(y+1)+16,currentX+16,currentY+16);
findXY('c',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(y+1)+16,currentX+16,currentY+16);
findXY('B',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,currentX+16,currentY+16);
findXY('e',x,y);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,currentX+16,currentY+16);
painter.drawLine(space_x*(x+1)+16,iHeight-space_y*(nY+1)+16,space_x*(x+1)+16,iHeight-space_y*(y+1)+16);
}
else
painter.drawPixmap(currentX,currentY,picture);
}
painter.end();
}
}
void paintTree_one::findXY(const char cCh, int &x, int &y)
{
vector<Node> nTemp;
nTemp=m_tree->tree;
if(cCh>='a'&&cCh<='e')//从左到右查找
{
for(int i=0;i<nTemp.size();i++)
{
if(nTemp[i].key==cCh)
{
x=nTemp[i].x;
y=nTemp[i].y;
return;
}
}
}
else
{
for(int i=nTemp.size();i>=0;i--)//从右到左查找
{
if(nTemp[i].key==cCh)
{
x=nTemp[i].x;
y=nTemp[i].y;
return;
}
}
}
}