一 組合框 ComboBox
1 組合框的樣式
1.1 簡單組合框 CBS_SIMPLE
1.2 下拉式組合框 CBS_DROPDOWN
能輸入或者從下拉列表中選擇
1.3 下拉列表式組合框 CBS_DROPDOWNLIST
只能從下拉列表中選擇
2 組合框的使用
2.1 組合框的創建
窗口類名稱是 COMBOBOX, 使用CreateWindow創建, 創建時要注意窗口高度(彈出的列表).
2.2 增加選項
CB_ADDSTRING/CB_INSERTSTRING
CB_ADDSTRING: WPARAM為0不使用, LPARAM是添加字符串的地址
2.3 刪除選項
CB_DELETESTRING 刪除指定選項
CB_RESETCONTENT 清空所有選項
2.4 選擇
CB_GETCURSEL 獲取被選擇項
CB_SETCURSEL 設置當前的選擇項
CB_SELECTSTRING 設置選擇指定的字符串所對應的項
2.5 查找
CB_FINDSTRING 根據指定的字符串,找到對應項的索引
1)大小寫不敏感
2)字符串和選項從左到右匹配.
3)選項包含字符串即可
2.6 獲取選項或者被選擇字符串
CB_GETLBTEXT 獲取選項的字符串
WM_GETTEXT 獲取被選擇到窗口的字符串
2.7 選項的數據
可以將自定義數據信息,在選項中設置和獲取.
CB_SETITEMDATA 將數據保存到選項中
CB_GETITEMDATA 從選項當中獲取數據
2.8 目錄顯示
CB_DIR 將指定路徑下的文件和路徑信息顯示在ComboBox當中
wParam - 顯示的類型
lParam - 路徑字符串地址
2.9 通知消息
通過WM_COMMAND消息,通知父窗口.
CBN_SELCHANGE 當窗口的選項發生變化的情況下,通知父窗口.
View Code
// WinComboBox.cpp : Defines the entry point for the application. // #include "stdafx.h" #include "stdio.h" #include "resource.h" HINSTANCE g_hInst = NULL; void OnCreate( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { //簡單組合框的創建 CreateWindow( "COMBOBOX", "SIMPLE", WS_CHILD|WS_VISIBLE|CBS_SIMPLE, 50, 50, 120, 300, hWnd, (HMENU)1001, g_hInst, NULL ); //下拉式組合框的創建 CreateWindow( "COMBOBOX", "DROPDOWN", WS_CHILD|WS_VISIBLE|WS_VSCROLL|CBS_DROPDOWN, 200, 50, 120, 300, hWnd, (HMENU)1002, g_hInst, NULL ); //下拉列表式組合框的創建 CreateWindow( "COMBOBOX", "DROPDOWNLIST", WS_CHILD|WS_VISIBLE|WS_VSCROLL|CBS_DROPDOWNLIST, 350, 50, 120, 100, hWnd, (HMENU)1003, g_hInst, NULL ); } void OnAdd( HWND hWnd ) { //獲取COMBOBOX窗口句柄 HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); //添加多個選項 CHAR szText[] = "ComboBox 0"; for( int nIndex=0; nIndex<10; nIndex++ ) { //添加選項 LRESULT nItem = SendMessage( hSimple, CB_ADDSTRING, 0, (LPARAM)szText ); //設置項的數據 SendMessage( hSimple, CB_SETITEMDATA, nItem, 100+nIndex ); SendMessage( hDropDown, CB_ADDSTRING, 0, (LPARAM)szText ); SendMessage( hDropList, CB_ADDSTRING, 0, (LPARAM)szText ); //改變選項內容 szText[9]++; } } void OnDel( HWND hWnd ) { //獲取COMBOBOX窗口句柄 HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); //刪除指定項 SendMessage( hSimple, CB_DELETESTRING, 5, 0 ); SendMessage( hDropDown, CB_DELETESTRING, 5, 0 ); SendMessage( hDropList, CB_DELETESTRING, 5, 0 ); } void OnReset( HWND hWnd ) { //獲取COMBOBOX窗口句柄 HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); //清空所有項 SendMessage( hSimple, CB_RESETCONTENT, 0, 0 ); SendMessage( hDropDown, CB_RESETCONTENT, 0, 0 ); SendMessage( hDropList, CB_RESETCONTENT, 0, 0 ); } void OnSelect( HWND hWnd ) { //獲取COMBOBOX窗口句柄 HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); //獲取和設置選擇項 LRESULT nSel = SendMessage( hSimple, CB_GETCURSEL, 0, 0 ); //獲取數據 LRESULT nValue = SendMessage( hSimple, CB_GETITEMDATA, nSel, 0 ); CHAR szInfo[260] = { 0 }; sprintf( szInfo, "%d", nValue ); MessageBox( NULL, szInfo, "WinCombo", MB_OK ); //設置選擇項 SendMessage( hDropDown, CB_SETCURSEL, nSel, 0 ); CHAR szText[] = "ComboBox 5"; SendMessage( hDropList, CB_SELECTSTRING, -1, (LPARAM)szText ); } void OnFind( HWND hWnd ) { //獲取COMBOBOX窗口句柄 HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); //查找字符串 CHAR szText[] = "ComboBox 5"; LRESULT nFind1 = SendMessage( hSimple, CB_FINDSTRING, -1, (LPARAM)szText ); SendMessage( hDropDown, CB_SETCURSEL, nFind1, 0 ); SendMessage( hDropList, CB_SETCURSEL, nFind1, 0 ); } void OnPath( HWND hWnd ) { //獲取COMBOBOX窗口句柄 HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); //顯示目錄 CHAR szPath[MAX_PATH] = "C:\\*.*"; SendMessage( hSimple, CB_DIR, DDL_DIRECTORY|DDL_ARCHIVE, (LPARAM)szPath ); SendMessage( hDropDown, CB_DIR, DDL_DIRECTORY|DDL_ARCHIVE, (LPARAM)szPath ); SendMessage( hDropList, CB_DIR, DDL_DIRECTORY|DDL_ARCHIVE, (LPARAM)szPath ); } void OnCommand( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { int nNotifyCode = HIWORD( wParam ); int nEventID = LOWORD( wParam ); switch( nEventID ) { case ID_ADD: OnAdd( hWnd ); break; case ID_DEL: OnDel( hWnd ); break; case ID_RESET: OnReset( hWnd ); break; case ID_SEL: OnSelect( hWnd ); break; case ID_FIND: OnFind( hWnd ); break; case ID_PATH: OnPath( hWnd ); break; case 1001: { HWND hSimple = GetDlgItem( hWnd, 1001 ); HWND hDropDown = GetDlgItem( hWnd, 1002 ); HWND hDropList = GetDlgItem( hWnd, 1003 ); LRESULT nSel = 0; switch( nNotifyCode ) { case CBN_SELCHANGE: nSel = SendMessage( hSimple, CB_GETCURSEL, 0, 0 ); SendMessage( hDropDown, CB_SETCURSEL, nSel, 0 ); SendMessage( hDropList, CB_SETCURSEL, nSel, 0 ); //MessageBox( NULL, "CBN_SELCHANGE", // "WinCombo", MB_OK ); break; } } break; } } LRESULT CALLBACK WndProc( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { switch( nMsg ) { case WM_CREATE: OnCreate( hWnd, nMsg, wParam, lParam ); break; case WM_COMMAND: OnCommand( hWnd, nMsg, wParam, lParam ); break; case WM_DESTROY: PostQuitMessage( 0 ); return 0; } return DefWindowProc( hWnd, nMsg, wParam, lParam ); } BOOL RegisterWnd( LPSTR pszClassName ) { WNDCLASSEX wce = { 0 }; wce.cbSize = sizeof( wce ); wce.cbClsExtra = 0; wce.cbWndExtra = 0; wce.hbrBackground = HBRUSH(COLOR_BTNFACE+1); wce.hCursor = NULL; wce.hIcon = NULL; wce.hIconSm = NULL; wce.hInstance = g_hInst; wce.lpfnWndProc = WndProc; wce.lpszClassName = pszClassName; wce.lpszMenuName = NULL; wce.style = CS_HREDRAW|CS_VREDRAW; ATOM nAtom = RegisterClassEx( &wce ); if( 0 == nAtom ) { return FALSE; } return TRUE; } HWND CreateWnd( LPSTR pszClassName ) { HMENU hMenu = LoadMenu( g_hInst, MAKEINTRESOURCE(IDR_MAIN) ); HWND hWnd = CreateWindowEx( 0, pszClassName, "MyWnd", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, hMenu, g_hInst, NULL ); return hWnd; } void DisplayWnd( HWND hWnd ) { ShowWindow( hWnd, SW_SHOW ); UpdateWindow( hWnd ); } void Message( ) { MSG msg = { 0 }; while( GetMessage( &msg, NULL, 0, 0 ) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { g_hInst = hInstance; RegisterWnd( "MYWND" ); HWND hWnd = CreateWnd( "MYWND" ); DisplayWnd( hWnd ); Message( ); return 0; }
二 列表框 ListBox
1 列表框的樣式
1.1 單選列表框 默認
1.2 多選列表框 LBS_MULTIPLESEL
2 列表框的使用
2.1 列表框的創建
窗口類名為LISTBOX, 使用CreateWindow/Ex
2.2 增加選項
LB_ADDSTRING
LB_INSERTSTRING
2.2 刪除選項
LB_DELETESTRING 刪除指定選項
LB_RESETCONTENT 清空所有選項
2.3 選擇項的獲取和設置
LB_GETCURSEL 獲取被選擇項
LB_SETCURSEL 設置當前被選擇項
LB_GETSEL 獲取指定項的選擇狀態
LB_SETSEL 設置指定項的選擇狀態
LB_GETSELCOUNT 獲取被選擇的數量
LB_GETSELITEMS 獲取被選擇項的索引
2.4 查找 LB_FINDSTRING
2.5 獲取指定項的文字
LB_GETEXT 指定項的文字
LB_GETTEXTLEN 指定項的文字的長度
2.6 選項的數據
LB_SETITEMDATA 將自定義數據保存到指定的選項當中
LB_GETITEMDATA 將自定義數據從指定選項中取出
2.7 目錄信息
LB_DIR 顯示指定目錄下的文件和子目錄信息
2.8 通知消息
LBN_SELCHANGE 當ListBox中的選擇項發生變化時,通知父窗口.
注意:對於ListBox需要增加LBS_NOTIFY的樣式,才能發送通知消息
View Code
// WinListBox.cpp : Defines the entry point for the application. // #include "stdafx.h" #include "resource.h" HINSTANCE g_hInst = NULL; HWND g_hSingle = NULL; HWND g_hMulti = NULL; void OnCreate( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { g_hSingle = CreateWindow( "LISTBOX", "SINGLE", WS_CHILD|WS_VISIBLE|LBS_NOTIFY, 50, 50, 200, 400, hWnd, (HMENU)1001, g_hInst, NULL ); g_hMulti = CreateWindow( "LISTBOX", "MULTI", WS_CHILD|WS_VISIBLE|LBS_MULTIPLESEL|LBS_NOTIFY, 300, 50, 200, 400, hWnd, (HMENU)1002, g_hInst, NULL ); } void OnAdd( ) { CHAR szText[] = "ListBox 0"; for( int nIndex=0; nIndex<10; nIndex++ ) { //添加項 LRESULT nItem = SendMessage( g_hSingle, LB_ADDSTRING, 0, (LPARAM)szText ); SendMessage( g_hMulti, LB_ADDSTRING, 0, (LPARAM)szText ); szText[8]++; } } void OnSelect( ) { //設置當前選擇項 SendMessage( g_hSingle, LB_SETCURSEL, 2, 0 ); //設置指定項的選擇狀態 for( int nIndex=0; nIndex<10; nIndex++ ) { SendMessage( g_hMulti, LB_SETSEL, TRUE, nIndex ); } //獲取所有選擇項的數量 LRESULT nCount = SendMessage( g_hMulti, LB_GETSELCOUNT, 0, 0 ); if( nCount == 10 ) { MessageBox( NULL, "10", "10", MB_OK ); } //獲取選擇項的索引號 INT nSel[20] = { 0 }; SendMessage( g_hMulti, LB_GETSELITEMS, 20, (LPARAM)nSel ); } void OnCommand( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { int nNotifyCode = HIWORD( wParam ); int nCtrlID = LOWORD( wParam ); switch( nCtrlID ) { case ID_ADD: OnAdd( ); break; case ID_SELECT: OnSelect( ); break; case 1001: { switch( nNotifyCode ) { case LBN_SELCHANGE: MessageBox( NULL, "LBN_SELCHANGE", "ListBox", MB_OK ); break; } } break; } } LRESULT CALLBACK WndProc( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { switch( nMsg ) { case WM_CREATE: OnCreate( hWnd, nMsg, wParam, lParam ); break; case WM_COMMAND: OnCommand( hWnd, nMsg, wParam, lParam ); break; case WM_DESTROY: PostQuitMessage( 0 ); return 0; } return DefWindowProc( hWnd, nMsg, wParam, lParam ); } BOOL RegisterWnd( LPSTR pszClassName ) { WNDCLASSEX wce = { 0 }; wce.cbSize = sizeof( wce ); wce.cbClsExtra = 0; wce.cbWndExtra = 0; wce.hbrBackground = HBRUSH(COLOR_BTNFACE+1); wce.hCursor = NULL; wce.hIcon = NULL; wce.hIconSm = NULL; wce.hInstance = g_hInst; wce.lpfnWndProc = WndProc; wce.lpszClassName = pszClassName; wce.lpszMenuName = NULL; wce.style = CS_HREDRAW|CS_VREDRAW; ATOM nAtom = RegisterClassEx( &wce ); if( 0 == nAtom ) { return FALSE; } return TRUE; } HWND CreateWnd( LPSTR pszClassName ) { HMENU hMenu = LoadMenu( g_hInst, MAKEINTRESOURCE(IDR_MAIN) ); HWND hWnd = CreateWindowEx( 0, pszClassName, "MyWnd", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, hMenu, g_hInst, NULL ); return hWnd; } void DisplayWnd( HWND hWnd ) { ShowWindow( hWnd, SW_SHOW ); UpdateWindow( hWnd ); } void Message( ) { MSG msg = { 0 }; while( GetMessage( &msg, NULL, 0, 0 ) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { g_hInst = hInstance; RegisterWnd( "MYWND" ); HWND hWnd = CreateWnd( "MYWND" ); DisplayWnd( hWnd ); Message( ); return 0; }
三 滾動條
1 滾動條樣式
1.1 水平滾動條 SBS_HORZ
1.2 垂直滾動條 SBS_VERT
2 滾動條的使用
2.1 滾動條的創建
窗口類名稱 SCROLLBAR
2.2 消息處理
2.2.1 水平滾動條 WM_HSCROLL
LOWORD(wParam) - 滾動的標示
HIWORD(wParam) - 當前滑塊的位置
lParam - 窗口的句柄
2.2.2 垂直滾動條 WM_VSCROLL
LOWORD(wParam) - 滾動的標示
HIWORD(wParam) - 當前滑塊的位置
lParam - 窗口的句柄
2.2.3 HIWORD(wParam)只在
SB_THUMBPOSITION/SB_THUMBTRACK時
有效.
2.3 滾動條的滾動范圍
SBM_SETRANGE 設置滾動條的滾動范圍
wParam - 最小值,起始值
lParam - 最大值,終止值
SBM_GETRANGE 獲取滾動條的滾動范圍
wParam - 最小值得存放的INT的地址
lParam - 最大值得存放的INT的地址
2.4 滑塊位置的設置和獲取
SBM_SETPOS 設置滑塊位置
wParam - 新的滑塊位置
lParam - 重新繪制窗口
SBM_GETPOS 獲取,返回當前位置
View Code
// WinScrollBar.cpp : Defines the entry point for the application. // #include "stdafx.h" HINSTANCE g_hInst = NULL; HWND g_hHorz = NULL; HWND g_hVert = NULL; void OnCreate( HWND hWnd, WPARAM wParam, LPARAM lParam ) { //創建滾動條 g_hHorz = CreateWindow( "SCROLLBAR", "HORZ", WS_CHILD|WS_VISIBLE|SBS_HORZ, 0, 300, 300, 30, hWnd, (HMENU)1001, g_hInst, NULL ); g_hVert = CreateWindow( "SCROLLBAR", "VERT", WS_CHILD|WS_VISIBLE|SBS_VERT, 300, 0, 30, 300, hWnd, (HMENU)1002, g_hInst, NULL ); //設置滾動范圍 SendMessage( g_hHorz, SBM_SETRANGE, 0, 300 ); SendMessage( g_hVert, SBM_SETRANGE, 0, 300 ); } void OnHScroll( HWND hWnd, WPARAM wParam, LPARAM lParam ) { int nScrollCode = LOWORD( wParam ); int nPos = HIWORD( wParam ); switch( nScrollCode ) { case SB_LINELEFT: //左邊箭頭 nPos = SendMessage( g_hHorz, SBM_GETPOS, 0, 0 ); nPos--; SendMessage( g_hHorz, SBM_SETPOS, nPos, TRUE ); break; case SB_LINERIGHT: //右邊箭頭 nPos = SendMessage( g_hHorz, SBM_GETPOS, 0, 0 ); nPos++; SendMessage( g_hHorz, SBM_SETPOS, nPos, TRUE ); break; case SB_PAGELEFT: //滑塊左邊的空白區域 nPos = SendMessage( g_hHorz, SBM_GETPOS, 0, 0 ); nPos -= 10; SendMessage( g_hHorz, SBM_SETPOS, nPos, TRUE ); break; case SB_PAGERIGHT://滑塊右邊的空白區域 nPos = SendMessage( g_hHorz, SBM_GETPOS, 0, 0 ); nPos += 10; SendMessage( g_hHorz, SBM_SETPOS, nPos, TRUE ); break; case SB_THUMBPOSITION://拖拽滑塊后 SendMessage( g_hHorz, SBM_SETPOS, nPos, TRUE ); break; } InvalidateRect( hWnd, NULL, TRUE ); } void OnVScroll( HWND hWnd, WPARAM wParam, LPARAM lParam ) { int nScrollCode = LOWORD( wParam ); int nPos = HIWORD( wParam ); switch( nScrollCode ) { case SB_LINEUP: //上邊箭頭 nPos = SendMessage( g_hVert, SBM_GETPOS, 0, 0 ); nPos--; SendMessage( g_hVert, SBM_SETPOS, nPos, TRUE ); break; case SB_LINEDOWN://下邊箭頭 nPos = SendMessage( g_hVert, SBM_GETPOS, 0, 0 ); nPos++; SendMessage( g_hVert, SBM_SETPOS, nPos, TRUE ); break; case SB_PAGEUP://滑塊上邊的空白區域 nPos = SendMessage( g_hVert, SBM_GETPOS, 0, 0 ); nPos -= 10; SendMessage( g_hVert, SBM_SETPOS, nPos, TRUE ); break; case SB_PAGEDOWN://滑塊下邊的空白區域 nPos = SendMessage( g_hVert, SBM_GETPOS, 0, 0 ); nPos += 10; SendMessage( g_hVert, SBM_SETPOS, nPos, TRUE ); break; case SB_THUMBPOSITION://拖拽滑塊后 SendMessage( g_hVert, SBM_SETPOS, nPos, TRUE ); break; } InvalidateRect( hWnd, NULL, TRUE ); } void OnPaint( HWND hWnd, WPARAM wParam, LPARAM lParam ) { PAINTSTRUCT ps = { 0 }; HDC hDC = BeginPaint( hWnd, &ps ); int nVert = SendMessage( g_hVert, SBM_GETPOS, 0, 0 ); int nHorz = SendMessage( g_hHorz, SBM_GETPOS, 0, 0 ); CHAR szText[] = "Hello ScroolBar"; TextOut( hDC, 150 - nHorz, 150 - nVert, szText, strlen(szText) ); EndPaint( hWnd, &ps ); } LRESULT CALLBACK WndProc( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { switch( nMsg ) { case WM_PAINT: OnPaint( hWnd, wParam, lParam ); break; case WM_CREATE: OnCreate( hWnd, wParam, lParam ); break; case WM_HSCROLL: OnHScroll( hWnd, wParam, lParam ); break; case WM_VSCROLL: OnVScroll( hWnd, wParam, lParam ); break; case WM_DESTROY: PostQuitMessage( 0 ); return 0; } return DefWindowProc( hWnd, nMsg, wParam, lParam ); } BOOL RegisterWnd( LPSTR pszClassName ) { WNDCLASSEX wce = { 0 }; wce.cbSize = sizeof( wce ); wce.cbClsExtra = 0; wce.cbWndExtra = 0; wce.hbrBackground = HBRUSH(COLOR_WINDOW); wce.hCursor = NULL; wce.hIcon = NULL; wce.hIconSm = NULL; wce.hInstance = g_hInst; wce.lpfnWndProc = WndProc; wce.lpszClassName = pszClassName; wce.lpszMenuName = NULL; wce.style = CS_HREDRAW|CS_VREDRAW; ATOM nAtom = RegisterClassEx( &wce ); if( 0 == nAtom ) { return FALSE; } return TRUE; } HWND CreateWnd( LPSTR pszClassName ) { HWND hWnd = CreateWindowEx( 0, pszClassName, "MyWnd", WS_OVERLAPPEDWINDOW|WS_HSCROLL|WS_VSCROLL, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, g_hInst, NULL ); return hWnd; } void DisplayWnd( HWND hWnd ) { ShowWindow( hWnd, SW_SHOW ); UpdateWindow( hWnd ); } void Message( ) { MSG msg = { 0 }; while( GetMessage( &msg, NULL, 0, 0 ) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { g_hInst = hInstance; RegisterWnd( "MYWND" ); HWND hWnd = CreateWnd( "MYWND" ); DisplayWnd( hWnd ); Message( ); return 0; }
四 控件的自繪制
1 控件具有OWNERDRAW樣式
BUTTON LISTBOX COMBOBOX
2 WM_MEASUREITEM
計算控件的大小
(UINT) wParam - 控件ID
(LPMEASUREITEMSTRUCT)lParam-控件項的大小
3 WM_DRAWITEM
實現控件的繪制
(UINT) wParam - 控件ID
(LPDRAWITEMSTRUCT)lParam - 控件繪制的信息
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// WinOwnerDraw.cpp : Defines the entry point for the application. // #include "stdafx.h" HINSTANCE g_hInst = NULL; void OnCreate( HWND hWnd, WPARAM wParam, LPARAM lParam ) { CreateWindow( "BUTTON", "MyButton", WS_CHILD|WS_VISIBLE|BS_OWNERDRAW, //自繪制控件需要有OWNERDRAW風格 50, 50, 200, 50, hWnd, (HMENU)1001, g_hInst, NULL ); } void OnDrawItem( HWND hWnd, WPARAM wParam, LPARAM lParam ) { LPDRAWITEMSTRUCT pDis = ( LPDRAWITEMSTRUCT )lParam; if( ODT_BUTTON == pDis->CtlType ) { //繪制按鈕 if( pDis->itemState & ODS_SELECTED ) { HBRUSH hBrush = CreateSolidBrush( RGB(200, 200, 255 ) ); HBRUSH hOldBrush = (HBRUSH) SelectObject( pDis->hDC, hBrush ); RoundRect( pDis->hDC, pDis->rcItem.left, pDis->rcItem.top, pDis->rcItem.right, pDis->rcItem.bottom, 15, 15 ); SelectObject( pDis->hDC, hOldBrush ); DeleteObject( hBrush ); } else { HBRUSH hBrush = CreateSolidBrush( RGB(100, 100, 255 ) ); HBRUSH hOldBrush = (HBRUSH) SelectObject( pDis->hDC, hBrush ); RoundRect( pDis->hDC, pDis->rcItem.left, pDis->rcItem.top, pDis->rcItem.right, pDis->rcItem.bottom, 15, 15 ); SelectObject( pDis->hDC, hOldBrush ); DeleteObject( hBrush ); } //繪制按鈕文字 CHAR szName[260] = { 0 }; GetWindowText( pDis->hwndItem, szName, 260 ); int nOldMode = SetBkMode( pDis->hDC, TRANSPARENT ); DrawText( pDis->hDC, szName, strlen(szName), &pDis->rcItem, DT_CENTER|DT_VCENTER|DT_SINGLELINE ); SetBkMode( pDis->hDC, nOldMode ); } } void OnMeasureItem( HWND hWnd, WPARAM wParam, LPARAM lParam ) { LPMEASUREITEMSTRUCT pMis = (LPMEASUREITEMSTRUCT)lParam; pMis->itemHeight = 200; } LRESULT CALLBACK WndProc( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lParam ) { switch( nMsg ) { case WM_CREATE: OnCreate( hWnd, wParam, lParam ); break; case WM_DRAWITEM: OnDrawItem( hWnd, wParam, lParam ); return 0; case WM_MEASUREITEM: OnMeasureItem( hWnd, wParam, lParam ); return 0; case WM_DESTROY: PostQuitMessage( 0 ); return 0; } return DefWindowProc( hWnd, nMsg, wParam, lParam ); } BOOL RegisterWnd( LPSTR pszClassName ) { WNDCLASSEX wce = { 0 }; wce.cbSize = sizeof( wce ); wce.cbClsExtra = 0; wce.cbWndExtra = 0; wce.hbrBackground = HBRUSH(COLOR_WINDOW); wce.hCursor = NULL; wce.hIcon = NULL; wce.hIconSm = NULL; wce.hInstance = g_hInst; wce.lpfnWndProc = WndProc; wce.lpszClassName = pszClassName; wce.lpszMenuName = NULL; wce.style = CS_HREDRAW|CS_VREDRAW; ATOM nAtom = RegisterClassEx( &wce ); if( 0 == nAtom ) { return FALSE; } return TRUE; } HWND CreateWnd( LPSTR pszClassName ) { HWND hWnd = CreateWindowEx( 0, pszClassName, "MyWnd", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, g_hInst, NULL ); return hWnd; } void DisplayWnd( HWND hWnd ) { ShowWindow( hWnd, SW_SHOW ); UpdateWindow( hWnd ); } void Message( ) { MSG msg = { 0 }; while( GetMessage( &msg, NULL, 0, 0 ) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { g_hInst = hInstance; RegisterWnd( "MYWND" ); HWND hWnd = CreateWnd( "MYWND" ); DisplayWnd( hWnd ); Message( ); return 0; }