CFileViewer(文件浏览器)
作者：互联网
1 #pragma once
2 #include <afxwin.h>
3 #include <afxtempl.h>
4
5 class CFileViewer : public CWnd
6 {
7 DECLARE_MESSAGE_MAP()
8 DECLARE_DYNAMIC(CFileViewer)
9 public:
10 struct FileItem
11 {
12 int type; //0为File 1为 directory
13 CString name; //
14 CString path; //代表当前D:\Download的路径,不包括名称
15 HICON hIcon;
16 };
17 CFileViewer();
18 ~CFileViewer();
19 /**
20 * 创建一个控件使其初始化
21 * @param pParent 父窗口对象指针
22 * @param dwStyle 控件样式
23 * @param rect 控件区域
24 * @param nId 控件的ID
25 */
26 void Create(CWnd* parent, DWORD style, RECT rect, UINT nId);
27 LPCTSTR GetClassName() {
28 return _T("CFileViewer");
29 }
30 LPCTSTR GetWindowName() {
31 return _T("CFileViewer");
32 }
33 /**
34 * 列举指定目录的文件
35 * @param dir 要列举的文件目录
36 */
37 void ListFile(CString dir);
38 virtual void SetDefaultVisualStyle();
39 private:
40 void AddFileViewer(FileItem* item)
41 {
42 m_arrItem.Add(item);
43 }
44 HICON GetFileIcon(SHFILEINFO strFileIcon, const CString& path);
45 /**
46 * 控件改变大小的时候会触发
47 * @param nType 是垂直还是水平大小
48 * @param cx x方向的偏移
49 * @param cy y方向的偏移
50 */
51 afx_msg void OnSize(UINT nType, int cx, int cy);
52 /**
53 * 重新绘制的时候触发
54 */
55 afx_msg void OnPaint();
56 afx_msg void OnVScroll(UINT, UINT, CScrollBar*);
57 afx_msg BOOL onm ouseWheel(UINT, short, CPoint);
58 afx_msg BOOL OnEraseBkgnd(CDC* pDC);
59
60 void RegisterCtrl();
61 void DrawItem(const FileItem* item, CDC* pDC);
62 void DrawText(CDC* pDC, CRect cr, CString str);
63 void GetPosition(CPoint& p);
64 void GetLayoutInfo();
65 static LRESULT WndProc(HWND, UINT, WPARAM, LPARAM);
66 protected:
67 CArray<FileItem*> m_arrItem;
68 int curX; ///< 每个item获取完位置后的X偏移
69 int curY; ///< 每个item获取完位置后的Y偏移
70 CSize itemSize; ///< 每个item的大小
71 CRect m_ctrlPadding; ///< ctrl的内间距
72 CRect m_itemPadding; ///< item的内间距
73 CRect m_itemMargin; ///< item之间的间距
74 CScrollBar m_scVertical; ///< 垂直滚动条
75 int m_nVertScrollPos;///< 垂直滚动的位置
76 int m_nRow; ///< item画出来需要多少行
77 int m_nCol; ///< item画出来需要多少列
78 bool m_bNeedGetLayout; ///< 是否需要重新计算布局 如果为true则需要
79 bool m_bFileMode; ///< 是否是文件模式 ，如果为否则为文件夹模式
80 };
#include "pch.h"
#include "CFileViewer.h"
#include <Gdiplus.h>
IMPLEMENT_DYNAMIC(CFileViewer, CWnd)
BEGIN_MESSAGE_MAP(CFileViewer, CWnd)
ON_WM_PAINT()
ON_WM_ERASEBKGND()
ON_WM_SIZE()
ON_WM_VSCROLL()
ON_WM_MOUSEWHEEL()
END_MESSAGE_MAP()
CFileViewer::CFileViewer()
{
WNDCLASS windowclass;
HINSTANCE hInst = AfxGetInstanceHandle();
if (!::GetClassInfo(hInst, this->GetClassName(), &windowclass))
{
RegisterCtrl();
}
m_bNeedGetLayout = false;
}
CFileViewer::~CFileViewer()
{
for (int i = 0; i < m_arrItem.GetSize(); i++)
{
delete m_arrItem[i];
}
}
void CFileViewer::Create(CWnd* pParent, DWORD dwStyle, RECT rect, UINT nId)
{
WNDCLASS windowclass;
HINSTANCE hInst = AfxGetInstanceHandle();
if (!::GetClassInfo(hInst, this->GetClassName(), &windowclass))
{
RegisterCtrl();
}
CWnd::Create(GetClassName(), GetWindowName(), dwStyle, rect, pParent, nId);
SetDefaultVisualStyle();
rect.left = rect.right - 10;
m_scVertical.Create(WS_CHILD | WS_CLIPCHILDREN | SBS_VERT, rect, this, AFX_IDW_VSCROLL_FIRST);
m_scVertical.EnableScrollBar(ESB_ENABLE_BOTH);
m_scVertical.SetScrollRange(0, 100, TRUE);
}
void CFileViewer::GetPosition(CPoint& p)
{
//p点作为右上角的点
//默许从左到右排序，然后依次换行
CRect rectClient;
GetClientRect(&rectClient);
if (curX == 0)
curX += m_ctrlPadding.left;
else
curX += m_itemMargin.right + itemSize.cx + m_itemMargin.left;
if (curY == 0)
curY += m_ctrlPadding.top;
if (curX >= rectClient.Width() - m_ctrlPadding.right)
{
//超过范围 开始下一行
curX = m_ctrlPadding.left;
curY += m_itemMargin.bottom + m_itemMargin.top + itemSize.cy;
}
p.SetPoint(curX, curY);
}
void CFileViewer::GetLayoutInfo()
{
if (m_bNeedGetLayout) return;
CRect rectClient;
GetClientRect(&rectClient);
int size = m_arrItem.GetSize();
//计算col列row行
m_nCol = (rectClient.Width() - m_ctrlPadding.left - m_ctrlPadding.right) / (itemSize.cx + m_itemMargin.left + m_itemMargin.top);
m_nRow = size / m_nCol + 1;
double dbTotalHeight = m_nRow * (itemSize.cy + m_itemMargin.top + m_itemMargin.bottom)
+ m_ctrlPadding.top + m_ctrlPadding.bottom;
float range = dbTotalHeight / (double)rectClient.Height() * 100.0;
if (range > 100)
{
m_scVertical.ShowScrollBar();
//set range
m_scVertical.SetScrollRange(0, range);
}
m_bNeedGetLayout = true;
}
void CFileViewer::OnSize(UINT nType, int cx, int cy)
{
//Invalidate();
}
void CFileViewer::ListFile(CString srcFile)
{
m_arrItem.RemoveAll();
//HICON hIcon = GetFileIcon(sfile, srcFile);
//逐个列举文件夹内所有txt文件
CString strFileName, strFileTemp, strSuffixTemp;
CFileFind findFile;
if (srcFile.Right(1) != '\\')
srcFile = srcFile += '\\';
else
{
srcFile.Right(1) = '\\';
srcFile = srcFile;
}
strFileTemp = srcFile + _T("*.*");
int nIsFind = findFile.FindFile(strFileTemp); //执行文件搜索
while (nIsFind)
{
nIsFind = findFile.FindNextFile(); //查找下一个文件
if (findFile.IsDirectory()) //若为目录，结束本次循环
continue;
strFileName = findFile.GetFileName(); //获取文件名称，包括后缀
FileItem* fitem = new FileItem();
SHFILEINFO sfile{ 0 };
fitem->hIcon = GetFileIcon(sfile, srcFile + strFileName);
fitem->name = strFileName;
fitem->path = srcFile;
//if (strFileName == ".." || strFileName == ".")
// continue;
//strSuffixTemp = strFileName.Mid(strFileName.GetLength() - 3, 3);
strFileName = srcFile + strFileName;
AddFileViewer(fitem);
//对文件进行后续处理
Invalidate();
}
}
HICON CFileViewer::GetFileIcon(SHFILEINFO stFileInfo, const CString& path)
{
// 同时将 ENM_CHANGE 标志“或”运算到掩码中。
::SHGetFileInfo(path, 0, &stFileInfo, sizeof(stFileInfo), SHGFI_ICON);
return stFileInfo.hIcon;
}
void CFileViewer::OnPaint()
{
CClientDC client(this);
//CDC& client = *GetDC();
PAINTSTRUCT ps;
this->BeginPaint(&ps);
CRect rectClient;
GetClientRect(&rectClient);
//bufferMemBitmap.CreateCompatibleBitmap(&client, rectClient.Width(), rectClient.Height());
//计算滚动
int size = m_arrItem.GetSize();
////计算col列row行
//int nCol = (rectClient.Width() - m_ctrlPadding.left - m_ctrlPadding.right) / (itemSize.cx + m_itemMargin.left + m_itemMargin.top);
//int nRow = size / nCol + 1;
//double dbTotalHeight = nRow * (itemSize.cy + m_itemMargin.top + m_itemMargin.bottom)
// + m_ctrlPadding.top + m_ctrlPadding.bottom;
//float range = dbTotalHeight /(double) rectClient.Height() * 100.0;
////set range
//m_scVertical.SetScrollRange(0,range);
//重新计算布局,
curX = 0;
curY = 0;
for (int i = 0; i < size; i++)
{
FileItem* fi = m_arrItem.GetAt(i);
DrawItem(fi, &client);
}
/*client.BitBlt(rectClient.left, rectClient.top, rectClient.Width(), rectClient.Height(),
&memDC, 0, 0, SRCCOPY);*/
//bufferMemBitmap.DeleteObject();
//memDC.DeleteDC();
EndPaint(&ps);
::SwapBuffers(client.GetSafeHdc());
/*LPITEMIDLIST pidl = NULL;
int hr = SHGetFolderLocation(NULL, CSIDL_BITBUCKET, NULL, 0, &pidl);*/
//SHFILEINFO shfi = { 0 }; //文件信息结构变量用于存放函数调用的结果
////memset(&shfi, 0, sizeof(shfi));
//DWORD dwError = GetLastError();
//SHGetFileInfo(_T("E:\\"), 0, &shfi, sizeof(SHFILEINFO), SHGFI_LARGEICON);
////SHGetFileInfo((LPCTSTR)pidl, -1, &shfi, sizeof(SHFILEINFO), SHGFI_ATTRIBUTES | SHGFI_TYPENAME);
//dwError = GetLastError();
//HICON hIcon = shfi.hIcon;
//client.DrawIcon(200, 20, hIcon);
}
void CFileViewer::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* scroll)
{
int TempPos = m_scVertical.GetScrollPos();
//SCROLLINFO si;
//GetScrollInfo(SB_HORZ, &si, SIF_ALL);
//m_ImgVScrollPos = si.nPos;
//dbHScroll = si.nPos;
m_nVertScrollPos = nPos;
GetLayoutInfo();
//switch (nSBCode)
//{
//case SB_THUMBPOSITION://拖动滑块
// m_scVertical.SetScrollPos(nPos);
// break;
//case SB_TOP://点击左边的箭头
// if (TempPos > 1)
// {
// TempPos--;
// }
// m_scVertical.SetScrollPos(TempPos);
// break;
//case SB_BOTTOM://点击右边的箭头
// if (TempPos < 100)
// {
// TempPos++;
// }
// m_scVertical.SetScrollPos(TempPos);
// break;
//}
//m_scVertical.Invalidate();
Invalidate(TRUE);
}
BOOL CFileViewer::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
if (m_nVertScrollPos < 0)
{
m_nVertScrollPos = 0;
return TRUE;
}
m_nVertScrollPos -= zDelta / 100.0;
INT min, max;
m_scVertical.GetScrollRange(&min, &max);
m_scVertical.SetScrollPos(m_nVertScrollPos);
GetLayoutInfo();
CRect rectClient;
GetWindowRect(&rectClient);
rectClient.right -= 60;
//InvalidateRect(&rectClient);
Invalidate();
// m_scVertical.Invalidate();
return TRUE;
}
BOOL CFileViewer::OnEraseBkgnd(CDC* pDC)
{
CRect rect;
GetClientRect(&rect);
//rect.right -= 60;
pDC->FillSolidRect(&rect, RGB(255, 255, 255));
//pDC->FillSolidRect(0, 0, 320, 240, RGB(255,255,255));
return TRUE;
}
void CFileViewer::SetDefaultVisualStyle()
{
itemSize.SetSize(100, 80);
m_itemPadding = { 1,1,1,1 }; //item内部
m_itemMargin = { 2,2,2,2 }; //margin间距
m_ctrlPadding = { 2,2,2,2 }; //控件内部padding
//m_arrItem.SetSize(3);
}
void CFileViewer::RegisterCtrl()
{
WNDCLASS w;
memset(&w, 0, sizeof(WNDCLASS)); // start with NULL defaults
w.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
w.lpszClassName = GetClassName();
w.hCursor = AfxGetApp()->LoadStandardCursor(IDC_ARROW);
w.hIcon = NULL;//GetIcon(FALSE);
w.hInstance = AfxGetInstanceHandle();
w.lpszMenuName = NULL;//_T("Menu");
w.cbClsExtra = w.cbWndExtra = 0;
w.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);//::GetSysColor(COLOR_WINDOW);
w.lpfnWndProc = (WNDPROC)AfxWndProc; //::DefWindowProc;//(WNDPROC)CGridCtrl::GridCtrlProc;
if (!AfxRegisterClass(&w))
{
AfxThrowResourceException();
return;
}
}
void CFileViewer::DrawItem(const FileItem* item, CDC* pDC)
{
CPoint p;
GetPosition(p);
p.y -= m_nVertScrollPos;
//p.Offset(itemSize.cx / 2, itemSize.cy / 2);
//pDC->Ellipse(p.x, p.y, p.x + itemSize.cx, p.y + itemSize.cy);
pDC->Rectangle(p.x, p.y, p.x + itemSize.cx, p.y + itemSize.cy);
CRect rect{ p.x, p.y, p.x + itemSize.cx, p.y + itemSize.cy };
CBrush brush(RGB(125, 125, 125));
pDC->FillRect(&rect, &brush);
pDC->DrawIcon(p.x + 40, p.y + 10, item->hIcon);
rect.DeflateRect(10, 50, 10, 10);
//pDC->TextOut(p.x, p.y, item->name);
//pDC->DrawText(item->name, rect, ES_MULTILINE| DT_TOP);
DrawText(pDC, rect, item->name);
}
void CFileViewer::DrawText(CDC* pDC, CRect cr, CString text)
{
CSize size;
GetTextExtentPoint(pDC->GetSafeHdc(), text, text.GetLength(), &size);
//BOOL B = this->SetCaretPos(nStartX, nStartY);
int cx = cr.left;
int cy = cr.top;
CString cstr;
for (int i = 0; i < text.GetLength(); i++)
{
cstr = text.GetAt(i);
GetTextExtentPoint(pDC->GetSafeHdc(), cstr, 1, &size);
//cr.SetRect(0, 0, size.cx, size.cy);
if (cx >= cr.right)
{
cx = cr.left;
cy += size.cy;
}
//cr.MoveToX(size.cx);
//pDC->DrawText(cstr, &cr, DT_CENTER);
pDC->TextOut(cx, cy, cstr);
cx += size.cx;
}
}
LRESULT CFileViewer::WndProc(HWND hWnd, UINT msgType, WPARAM wParam, LPARAM lParam)
{
return AfxWndProc(hWnd, msgType, wParam, lParam);
}
标签：文件,浏览器,int,void,cx,rectClient,CFileViewer,pDC 来源： https://www.cnblogs.com/yang131/p/14372442.html