www.pudn.com > VCad3.0.zip > VCadView-1.cpp
// VCadView.cpp : implementation of the CVCadView class
//
#include "stdafx.h"
#include "VCad.h"
#include "VCadDoc.h"
#include "VCadView.h"
#include "Base.h"
#include "Command.h"
#include "CreateCmd.h"
#include "ModifyCmd.h"
#include "Entity.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CVCadView
IMPLEMENT_DYNCREATE(CVCadView, CView)
BEGIN_MESSAGE_MAP(CVCadView, CView)
//{{AFX_MSG_MAP(CVCadView)
ON_WM_LBUTTONDOWN()
ON_WM_MOUSEMOVE()
ON_WM_RBUTTONDOWN()
ON_COMMAND(ID_PICK, OnPick)
ON_UPDATE_COMMAND_UI(ID_PICK, OnUpdatePick)
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
ON_COMMAND_RANGE(ID_CREATE_LINE, ID_CREATE_ARC, OnCreateEntity)
ON_UPDATE_COMMAND_UI_RANGE(ID_CREATE_LINE, ID_CREATE_ARC, OnUpdateCreateCommand)
ON_COMMAND_RANGE(ID_MODIFY_MOVE, ID_MODIFY_MIRROR, OnModifyEntity)
ON_UPDATE_COMMAND_UI_RANGE(ID_MODIFY_MOVE, ID_MODIFY_MIRROR, OnUpdateModifyCommand)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CVCadView construction/destruction
CVCadView::CVCadView()
{
// TODO: add construction code here
g_pView = this;
m_pCmd = NULL;
// 初始化世界坐标与屏幕坐标的关系
m_dOrgX = m_dOrgY = 0.;
scale = 1.;
}
CVCadView::~CVCadView()
{
if( m_pCmd )
delete m_pCmd ;
}
BOOL CVCadView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CVCadView drawing
void CVCadView::OnDraw(CDC* pDC)
{
g_nRefresh ++; // 每次视窗被重新绘制时，刷新次数加 1
CVCadDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
pDoc->Draw(pDC);
}
/////////////////////////////////////////////////////////////////////////////
// CVCadView diagnostics
#ifdef _DEBUG
void CVCadView::AssertValid() const
{
CView::AssertValid();
}
void CVCadView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CVCadDoc* CVCadView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CVCadDoc)));
return (CVCadDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CVCadView message handlers
void CVCadView::OnCreateEntity(int m_nID)
{
// 如果当前状态存在命令，那么
// 1. 取消该命令的操作
// 2. 删除该命令对象
// 3. 将命令指针设为空
if( m_pCmd ){
m_pCmd->Cancel();
delete m_pCmd ;
m_pCmd = NULL;
}
// 下面根据不同的菜单命令创建不同的命令对象
switch(m_nID)
{
case ID_CREATE_LINE: // 直线
{
m_pCmd = new CCreateLine();
break;
}
}
}
void CVCadView::OnUpdateCreateCommand(CCmdUI* pCmdUI)
{
int flag = 0 ;
switch(pCmdUI->m_nID)
{
case ID_CREATE_LINE:
{
if( (m_pCmd != NULL && m_pCmd->GetType() == ctCreateLine) )
flag = 1;
break;
}
default:
break;
}
pCmdUI->SetCheck(flag);
}
void CVCadView::OnModifyEntity(int m_nID)
{
// 如果当前状态存在命令，那么
// 1. 取消该命令的操作
// 2. 删除该命令对象
// 3. 将命令指针设为空
if( m_pCmd ){
m_pCmd->Cancel();
delete m_pCmd ;
m_pCmd = NULL;
}
// 下面根据不同的菜单命令创建不同的命令对象
switch(m_nID)
{
case ID_MODIFY_MOVE: // 平移
{
m_pCmd = new CMove();
break;
}
case ID_MODIFY_ROTATE: // 旋转
{
m_pCmd = new CRotate();
break;
}
case ID_MODIFY_MIRROR: // 镜像
{
m_pCmd = new CMirror();
break;
}
default:
break;
}
}
void CVCadView::OnUpdateModifyCommand(CCmdUI* pCmdUI)
{
int flag = 0 ;
switch(pCmdUI->m_nID)
{
case ID_MODIFY_MOVE:
{
if( (m_pCmd != NULL && m_pCmd->GetType() == ctMove) )
flag = 1;
break;
}
case ID_MODIFY_ROTATE:
{
if( (m_pCmd != NULL && m_pCmd->GetType() == ctRotate) )
flag = 1;
break;
}
case ID_MODIFY_MIRROR:
{
if( (m_pCmd != NULL && m_pCmd->GetType() == ctMirror) )
flag = 1;
break;
}
default:
break;
}
pCmdUI->SetCheck(flag);
}
void CVCadView::WorldtoScreen(const Position& pos, CPoint& screenPt)
{
// 获取当前客户区的大小
CRect rect ;
GetClientRect(&rect) ;
// 将屏幕原点设置为客户区的中心
int nSOrgX = (rect.left + rect.right) / 2 ;
int nSOrgY = -(rect.top + rect.bottom) / 2 ;
// 计算屏幕坐标值
screenPt.x = (int)((pos.x - m_dOrgX) / scale + nSOrgX) ;
// screenPt.y = (int)(nSOrgY - (pos.y - m_dOrgY) / scale) ;
screenPt.y = (int)((pos.y - m_dOrgY) / scale + nSOrgY) ;
}
void CVCadView::ScreentoWorld(const CPoint& pt, Position& pos)
{
CPoint screenPt = pt;
CDC* pDC = GetDC();
pDC->SetMapMode(MM_LOENGLISH);
pDC->DPtoLP(&screenPt);
ReleaseDC(pDC);
// 获取当前客户区的大小
CRect rect ;
GetClientRect(&rect) ;
// 将屏幕原点设置为客户区的中心
int nSOrgX = (rect.left + rect.right) / 2 ;
int nSOrgY = -(rect.top + rect.bottom) / 2 ;
// 计算世界坐标值
pos.x = (screenPt.x - nSOrgX) * scale + m_dOrgX;
// pos.y = (nSOrgY - screenPt.y ) * scale + m_dOrgY;
pos.y = (screenPt.y - nSOrgY ) * scale + m_dOrgY;
}
double CVCadView::GetScale()
{
return scale;
}
void CVCadView::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CVCadDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
Position pos;
ScreentoWorld(point, pos); // 将设备坐标转换为世界坐标
if(m_pCmd)
m_pCmd->OnLButtonDown(nFlags, pos);
else
pDoc->OnLButtonDown(nFlags, pos);
CView::OnLButtonDown(nFlags, point);
}
void CVCadView::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CVCadDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
Position pos;
ScreentoWorld(point, pos);// 将设备坐标转换为世界坐标
if(m_pCmd)
m_pCmd->OnMouseMove(nFlags, pos);
else
pDoc->OnMouseMove(nFlags, pos);
CView::OnMouseMove(nFlags, point);
}
void CVCadView::OnRButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
Position pos;
ScreentoWorld(point, pos);// 将设备坐标转换为世界坐标
if(m_pCmd)
m_pCmd->OnRButtonDown(nFlags, pos);
CView::OnRButtonDown(nFlags, point);
}
void CVCadView::OnPick()
{
// TODO: Add your command handler code here
if(m_pCmd){
delete m_pCmd;
m_pCmd = NULL;
}
}
void CVCadView::OnUpdatePick(CCmdUI* pCmdUI)
{
// TODO: Add your command update UI handler code here
pCmdUI->SetCheck(m_pCmd == NULL ? 1 : 0) ;
}
/////////////////////////////////////////////////////////////////////////////
// CVCadView printing
BOOL CVCadView::OnPreparePrinting(CPrintInfo* pInfo)
{
// 每页打印5 个图元对象的信息
CVCadDoc* pDoc = GetDocument();
pInfo->SetMaxPage(pDoc->m_EntityList.GetCount()/5 + 1);
return DoPreparePrinting(pInfo);
}
void CVCadView::OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo)
{
// TODO: add extra initialization before printing
// 获得可打印区域（毫米值）
int nHorzSize = pDC->GetDeviceCaps(HORZSIZE);
int nVertSize = pDC->GetDeviceCaps(VERTSIZE);
// 计算页面的高度和宽度（逻辑单位）
m_nPageWidth = (int)((double)nHorzSize / 25.4 * 100.0);
m_nPageHeight = (int)((double)nVertSize / 25.4 * 100.0);
}
void CVCadView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
void CVCadView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
// TODO: Add your specialized code here and/or call the base class
pDC->SetMapMode(MM_LOENGLISH);
CView::OnPrepareDC(pDC, pInfo);
}
void CVCadView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
{
// TODO: Add your specialized code here and/or call the base class
// CView::OnPrint(pDC, pInfo); // 注释掉缺省的代码
int nStart, nEnd, nHeight;
CString str;
CPoint point(30,-70);
TEXTMETRIC tm;
ASSERT_VALID(pDC);
// 打印页眉
PrintPageHeader(pDC,pInfo);
CVCadDoc* pDoc = GetDocument();
str.Format("%8.8s %8.8s %8.8s","图元序号","图元类型","图元属性");
pDC->SetTextAlign(TA_LEFT);
pDC->TextOut(point.x,point.y,str);
pDC->GetTextMetrics(&tm);
nHeight = tm.tmHeight + tm.tmExternalLeading;
int index = -1;
nStart = (pInfo->m_nCurPage - 1) * 5;
nEnd = nStart + 5;
POSITION pos = pDoc->m_EntityList.GetHeadPosition();
while(pos!=NULL)
{
CEntity* pEntity = (CEntity *) pDoc->m_EntityList.GetNext(pos);
index ++;
if(index < nStart)
continue;
else if(index >= nEnd)
break;
point.y -= nHeight;
if(pEntity->IsKindOf(RUNTIME_CLASS(CLine)))
{
CLine* pLine = (CLine*)pEntity;
str.Format("%8d %8.8s ", index + 1, "直线");
CString str1,str2;
Position pos1,pos2;
pos1 = pLine->GetBeginPos();
pos2 = pLine->GetEndPos();
str1.Format("%8.8s %8.2f %8.2f ","起点:",pos1.x,pos1.y);
str2.Format("%8.8s %8.2f %8.2f ","终点:",pos2.x,pos2.y);
str = str + str1 + str2;
pDC->TextOut(point.x, point.y, str);
}
// else if(其它类型)...
// 读者可以试着自己添加
}
// 打印页脚
PrintPageFooter(pDC,pInfo);
}
void CVCadView::PrintPageHeader(CDC *pDC, CPrintInfo *pInfo)
{
// 获取设备描述表中缺省的字体
TEXTMETRIC tm;
pDC->GetTextMetrics(&tm);
// 创建新字体并将其选入设备描述表
CFont newFont;
newFont.CreateFont(-tm.tmHeight,
0,0,0,
FW_NORMAL,
FALSE, FALSE,
0,
ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
DEFAULT_QUALITY, DEFAULT_PITCH|FF_MODERN,
"Courier New");
CFont* pOldFont = (CFont*)pDC->SelectObject(&newFont);
// 页眉中的文本右对齐
pDC->SetTextAlign(TA_RIGHT);
// 打印页眉文本
pDC->TextOut(pInfo->m_rectDraw.right, -25, "VCad 绘图系统");
// 打印页眉中的水平直线
int y = - 35 - tm.tmHeight;
pDC->MoveTo(0,y);
pDC->LineTo(pInfo->m_rectDraw.right,y);
// 根据页眉占用的空间来调整可打印图形区域
y -= 25;
pInfo->m_rectDraw.top += y;
// 恢复以前的字体
pDC->SelectObject(pOldFont);
}
// 打印页脚
void CVCadView::PrintPageFooter(CDC *pDC, CPrintInfo *pInfo)
{
CVCadDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// 由文档保存的位置或者标题和当前的页码构成页脚的文本
// 如果文档没有被保存，则打印文档的标题名称；反之，则打印文档保存的位置
CString strFooter = pDoc->GetPathName();
CString strTitle = pDoc->GetTitle();
if(strTitle == "Untitled" || strTitle == "无标题")
strFooter = strTitle;
// 文本左对齐
pDC->SetTextAlign(TA_LEFT);
// 打印文本
pDC->TextOut(pInfo->m_rectDraw.left,
pInfo->m_rectDraw.bottom + 100, strFooter);
// 在页脚中添加页码信息
CString strPage;
strPage.Format("%s%d%s", "第", pInfo->m_nCurPage, "页");
// 获取页码的宽度
CSize size = pDC->GetTextExtent(strFooter);
// 页码右对齐
pDC->TextOut(pInfo->m_rectDraw.right - size.cx,
pInfo->m_rectDraw.bottom + 100, strPage);
// 绘制页脚的水平上划线
TEXTMETRIC tm;
pDC->GetTextMetrics(&tm);
int y = pInfo->m_rectDraw.bottom + 90 + tm.tmHeight;
pDC->MoveTo(0, y);
pDC->LineTo(pInfo->m_rectDraw.right, y);
}