gui_manager.cpp

linux下一款GIS程序源码

// gui_manager.cpp

#include "gui_manager.h"
#include "KitSrc/ugk_memopr.h"
#include "KitSrc/ugkglobal.h"

GUI_Manager::GUI_Manager()
{
    m_NumLayer = 0;
    m_AllocLayer = 0;
    m_Layers  = NULL;
    m_BoundLeft = 0;
    m_BoundRight = 0;
    m_BoundTop = 0;
    m_BoundBottom = 0;
    m_XCenter = m_YCenter = 0;
    m_Xview = m_Yview = 0;
}

GUI_Manager::~GUI_Manager()
{
    if(m_Layers)
    {
	for(int i=0;i<m_NumLayer;i++)
	{
	    GUI_Layer *lyr=*(m_Layers+i);
	    delete lyr;
	}
	delete m_Layers;
    }
}


void GUI_Manager::setCenter(double cx, double cy)
{
    m_XCenter = cx;
    m_YCenter = cy;
}

void GUI_Manager::getCenter(double &cx, double &cy)
{
    cx = m_XCenter;
    cy = m_YCenter;
}

void GUI_Manager::setView(double vx, double vy)
{
    if(vx>(m_BoundRight-m_BoundLeft))
    {
	vx = m_BoundRight-m_BoundLeft;
    }
    if(vy>(m_BoundBottom-m_BoundTop)) 
    {   
	vy = m_BoundBottom-m_BoundTop;
    }
    if(vx<0.05)
	vx = 0.05;
    if(vy<0.05)
	vy = 0.05;
    m_Xview = vx;
    m_Yview = vy;
}

void GUI_Manager::getView(double &vx,double &vy)
{
    vx = m_Xview;
    vy = m_Yview;
}


void GUI_Manager::UpdateBound(double minX,double maxX,double minY,double maxY)
{
    if(m_NumLayer==1) //第一个
    {
	m_BoundLeft = minX;
	m_BoundRight = maxX;
	m_BoundTop = minY;
	m_BoundBottom = maxY;
	
    }
    else
    {
	if(minX<m_BoundLeft)
	    m_BoundLeft = minX;
	if(maxX>m_BoundRight)
	    m_BoundRight = maxX;
	if(minY<m_BoundTop)
	    m_BoundTop = minY;
	if(maxY>m_BoundBottom)
	    m_BoundBottom = maxY;
    }
    
    m_XCenter = (m_BoundLeft+m_BoundRight)/2;
    m_YCenter = (m_BoundTop+m_BoundBottom)/2;
    m_Xview =  m_BoundRight-m_BoundLeft+5;
    m_Yview =  m_BoundBottom-m_BoundTop+5;
    //printf("Xview = %f  Yview = %f \n",m_Xview,m_Yview);

}


void GUI_Manager::ComputerDistperPixel()
{
    //printf("paintWidth = %d paintHeight =  %d\n",m_paintWidth,m_paintHeight);
    //printf("m_Xview = %f  m_Yview =  %f \n",m_Xview, m_Yview);
    double xPerPixel = m_Xview/(m_paintWidth);  //边沿需要留一点空间
    double yPerPixel = m_Yview/(m_paintHeight);
    m_DistperPixel =(xPerPixel>yPerPixel)?xPerPixel:yPerPixel; 
    m_Xview = m_DistperPixel *(m_paintWidth);
    m_Yview = m_DistperPixel*(m_paintHeight);
    //printf("Xview= %f  Yview= %f\n",m_Xview,m_Yview);
}


GUI_Layer* GUI_Manager::GetLayerRef(int idx)
{
    if( (idx<0) || (idx>=m_NumLayer) )
	return NULL;
    return *(m_Layers+idx);
}

void GUI_Manager::AddLayer(GUI_Layer *lyrAdd)
{
    //printf("GUI_Manager::AddLayer()\n");
    if(lyrAdd==NULL)
	return;
    
    if(m_AllocLayer==m_NumLayer)
    {
	m_AllocLayer += 5;
	m_Layers = (GUI_Layer **)UGK_Realloc(m_Layers,m_AllocLayer*sizeof(GUI_Layer *) );
	
    }
    
    *(m_Layers+m_NumLayer) = lyrAdd;  
    m_NumLayer++;
    
    double left,right,top,bottom;
    lyrAdd->getLayerExtent(right,left,bottom,top);
    UpdateBound(left,right,top,bottom);
    
}


void GUI_Manager::RemoveLayer(int idx)
{
    if((idx<0)||(idx>=m_NumLayer))
    {
	return;
    }
    GUI_Layer *lyr=*(m_Layers+idx);
    int zPos = lyr->getZposition();
    for(int i=idx;i<m_NumLayer-1;i++)
    {
	*(m_Layers+i) = *(m_Layers+i+1);
	
    }
    *(m_Layers+m_NumLayer-1) = NULL;
    m_NumLayer--;
    delete lyr;
    lyr = NULL;
    for(int j=0;j<m_NumLayer;j++)
    {
	lyr = *(m_Layers+j);
	int pos =lyr->getZposition();
	if( pos>zPos)
	    lyr->setZposition(pos-1);
	    
    }
}


GUI_Layer* GUI_Manager::GetLayerRef(const char *lyrName)
{
    if(lyrName==NULL)
	return NULL;
    GUI_Layer *lyr=NULL;
    for(int i=0;i<m_NumLayer;i++)
    {
	lyr = GetLayerRef(i);
	assert(lyr!=NULL);
	if( EQUAL(lyrName,lyr->getFileName()) )
	    return lyr;
    }   
    return NULL;
}


GUI_Layer* GUI_Manager::GetLayerRefByZpos(int zPos)
{
    GUI_Layer *lyr=NULL;

    for(int i=0;i<m_NumLayer;i++)
    {
	lyr = GetLayerRef(i);
	assert(lyr!=NULL);
	if(lyr->getZposition()==zPos)
	    return lyr;
    }
    return NULL;
}

void GUI_Manager::setPaintRect(int top,int left, int pw,int ph)
{
    m_paintTop = top;
    m_paintLeft = left;
    m_paintWidth = pw;
    m_paintHeight = ph;    
}

void GUI_Manager::InitAllLayers()
{
    GUI_Layer *oneLyr=NULL;
    for(int i=0;i<m_NumLayer;i++)
    {
	oneLyr =GetLayerRef(i);
	if(!oneLyr->IsDataInited())
	    oneLyr->InitDataFromFile();
	
    }
}

void GUI_Manager::Draw(QPaintDevice *pd)
{
    printf("GUI_Manager::Draw()\n");
    ComputerDistperPixel();
    GUI_Layer *oneLyr=NULL;
    for(int i=m_NumLayer-1;i>=0;i--)
    {
	oneLyr = GetLayerRefByZpos(i);
	oneLyr->setLayerCenter(m_XCenter,m_YCenter);
	oneLyr->setLayerView(m_Xview,m_Yview);
	oneLyr->setDistperPixel(m_DistperPixel);
	oneLyr->setPaintRect(m_paintTop,m_paintLeft,m_paintWidth,m_paintHeight);
	oneLyr->Draw(pd);
    }
}


/*         调试用              */
void GUI_Manager::PrintInfo()
{
    printf("Layer Manager :\n");
    GUI_Layer *lyr=NULL;
    for(int i=0;i<m_NumLayer;i++)
    {
	lyr = GetLayerRef(i);
	printf("The Zposition  %d\n",lyr->getZposition());
	printf("The %d Layer:%s\n",i,lyr->getFileName());
	
    }
}