Win32编程day10 学习笔记

一 组合框 ComboBox

1 组合框的样式

1.1 简单组合框 CBS_SIMPLE
1.2 下拉式组合框 CBS_DROPDOWN
能输入或者从下拉列表中选择
1.3 下拉列表式组合框 CBS_DROPDOWNLIST
只能从下拉列表中选择

2 组合框的使用

2.1 组合框的创建
窗口类名称是 COMBOBOX, 使用CreateWindow创建, 创建时要注意窗口高度(弹出的列表).
2.2 增加选项
CB_ADDSTRING/CB_INSERTSTRING
CB_ADDSTRING: WPARAM为0不使用, LPARAM是添加字符串的地址
2.3 删除选项
CB_DELETESTRING 删除指定选项
CB_RESETCONTENT 清空所有选项
2.4 选择
CB_GETCURSEL 获取被选择项
CB_SETCURSEL 设置当前的选择项
CB_SELECTSTRING 设置选择指定的字符串所对应的项
2.5 查找
CB_FINDSTRING 根据指定的字符串,找到对应项的索引
1)大小写不敏感
2)字符串和选项从左到右匹配.
3)选项包含字符串即可
2.6 获取选项或者被选择字符串
CB_GETLBTEXT 获取选项的字符串
WM_GETTEXT 获取被选择到窗口的字符串

2.7 选项的数据
可以将自定义数据信息,在选项中设置和获取.
CB_SETITEMDATA 将数据保存到选项中
CB_GETITEMDATA 从选项当中获取数据

2.8 目录显示
CB_DIR 将指定路径下的文件和路径信息显示在ComboBox当中
wParam - 显示的类型
lParam - 路径字符串地址

2.9 通知消息
通过WM_COMMAND消息,通知父窗口.
CBN_SELCHANGE 当窗口的选项发生变化的情况下,通知父窗口.

View Code

// 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,  //自绘制控件需要有OWNERDRAW风格
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 )
{    //绘制按钮
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 );
}
//绘制按钮文字
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;
}