我正在为win32测试Combobox的理论。已经尝试了很多东西,但我不知道如何让它做我想做的事。当在组合框中进行选择时,我希望它打印到编辑框中。我相信这可以通过手柄完成。
因此,如果我通过按钮1的演员表将它添加到我的按钮1,你如何将其打印到编辑字段?
我的代码如下。我留下了一些我尝试过的东西但是对它进行了评论。问题是添加控件,我在想我的开关和案例。
我错过了将文本填充到编辑框的一部分。
对于这种类型的编程而言,我对编程并不是一个新手。我正在寻找一种简单的方法。在此先感谢您的时间。
以下是更新后的代码以及我现在所获得的内容。我遵循unicode指南。我甚至和visual studio c ++结交了朋友(我想)。
#include <windows.h>
#include <tchar.h>
#include <iostream>
using namespace std;
#define OPTINBT1 1
#define OPTINBT2 2
#define COMBO1 3
HWND hWnd, hComboOne;
void addControl(HWND);
LPCWSTR egClassName = L"myWindowClass";
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR args, int nCmdShow)
{
WNDCLASSW wc = { 0 };
wc.lpszClassName = egClassName;
wc.lpfnWndProc = WindowProcedure;
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wc.hInstance = hInst;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
if (!RegisterClassW(&wc))
{
const wchar_t Error01[] = L"Register Issue To Check On : ";
const wchar_t Error01_Caption[] = L"Error 01";
MessageBoxW(hWnd, Error01, Error01_Caption, MB_OK | MB_ICONERROR);
return 0;
}
LPCWSTR parentWinTitle = L"My Window";
hWnd = CreateWindowW(egClassName, parentWinTitle, WS_OVERLAPPEDWINDOW | WS_VISIBLE, 100, 100, 500, 500, NULL, NULL, NULL, NULL);
if (hWnd == NULL)
{
const wchar_t Error02[] = L"Window Creation Issue To Check On : ";
const wchar_t Error02_Caption[] = L"Window Creation Issue To Check On : ";
MessageBoxW(hWnd, Error02, Error02_Caption, MB_OK | MB_ICONERROR);
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
MSG msg = { 0 };
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
LRESULT CALLBACK WindowProcedure(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp)
{
switch (msg)
{
case WM_CREATE:
addControl(hWnd);
break;
case WM_COMMAND:
if (HIWORD(wp) == CBN_SELCHANGE)
{
if (LOWORD(wp) == COMBO1)
{
HWND hcombo = (HWND)lp;
LRESULT index = SendMessageW(hcombo, CB_GETCURSEL, (WPARAM)0, (LPARAM)0);
wchar_t buf[256];
SendMessageW(hcombo, (UINT)CB_GETLBTEXT, (WPARAM)index, (LPARAM)buf);
MessageBoxW(hWnd, buf, L"Good Example", 0);
}
break;
}
switch (LOWORD(wp))
{
case OPTINBT1:
MessageBoxW(hWnd, L"This is Radio button1: ", L"Radio Button 2 is good", MB_OK);
break;
case OPTINBT2:
MessageBoxW(hWnd, L"This is Radio button2: ", L"Radio Button 1 is good", MB_OK);
break;
default:break;
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProcW(hWnd, msg, wp, lp);
}
return 0;
}
void addControl(HWND hWnd)
{
HWND OptBt1, OptBt2;
const LPCWSTR cont1 = L"STATIC";
const LPCWSTR cont2 = L"COMBOBOX";
const LPCWSTR cont3 = L"BUTTON";
const LPCWSTR emptyS = L"";
const LPCWSTR bl = L"RButton 1";
const LPCWSTR b2 = L"RButton 2";
//Option buttons
OptBt1 = CreateWindowW(cont3, bl, WS_VISIBLE | WS_CHILD | BS_AUTORADIOBUTTON, 24, 8, 90, 25, hWnd, (HMENU)OPTINBT1, NULL, NULL);
OptBt2 = CreateWindowW(cont3, b2, WS_VISIBLE | WS_CHILD | BS_AUTORADIOBUTTON, 24, 40, 90, 25, hWnd, (HMENU)OPTINBT2, NULL, NULL);
SendMessage(OptBt1, BM_SETCHECK, BST_CHECKED, 0);
hComboOne = CreateWindowW(cont2, emptyS, WS_VISIBLE | WS_CHILD | CBS_DROPDOWN | CBS_HASSTRINGS | WS_VSCROLL, 77, 70, 150, 150, hWnd, (HMENU)COMBO1, 0, 0);
LPCWSTR ComboBoxItems[] = { L"Subject1", L"Subject2", L"Subject3",
L"Subject4", L"Subject5" };
/** Or the array way */
SendMessageW(hComboOne, CB_ADDSTRING, 0, (LPARAM)ComboBoxItems[0]);
SendMessageW(hComboOne, CB_ADDSTRING, 0, (LPARAM)ComboBoxItems[1]);
SendMessageW(hComboOne, CB_ADDSTRING, 0, (LPARAM)ComboBoxItems[2]);
SendMessageW(hComboOne, CB_ADDSTRING, 0, (LPARAM)ComboBoxItems[3]);
SendMessageW(hComboOne, CB_ADDSTRING, 0, (LPARAM)ComboBoxItems[4]);
}
答案 0 :(得分:4)
WM_CREATE
之前插入 addControl
。
在WM_COMMAND
回复CBN_SELCHANGE
通知以检测组合框选择更改。
当您显示消息框时,您可以使用您自己的窗口MessageBox(hWnd,...)
的句柄。如果您提供NULL
作为句柄,则消息框将成为桌面窗口的子项,其行为就像在无模式模式下显示一样。
switch(msg)
{
case WM_CREATE:
addControl(hWnd);
break;
case WM_COMMAND:
if(HIWORD(wp) == CBN_SELCHANGE)
{
if(LOWORD(wp) == COMBO1)
{
HWND hcombo = (HWND)lp;
int index = SendMessage(hcombo, CB_GETCURSEL, (WPARAM)0, (LPARAM)0);
char buf[256];
SendMessage(hcombo, (UINT)CB_GETLBTEXT, (WPARAM)index, (LPARAM)buf);
MessageBox(hWnd, buf, 0, 0);
}
break;
}
switch(LOWORD(wp))
{
case OPTINBT1:
MessageBox(hWnd, "This is Radio button1: ", "ComboBox Working??", MB_OK);
break;
case OPTINBT2:
MessageBox(hWnd, "This is Radio button2: ", "ComboBox Working??", MB_OK);
break;
default:break;
}
break;
与您的问题无关,但您正在将Unicode(示例L"EDIT"
)与ANSI(示例"EDIT"
)混合使用。
像CreateWindow
这样的窗口函数是宏。在ANSI中,它是CreateWindowA
,在Unicode中,它是宽函数CreateWindowW
您正在以旧ANSI模式编译程序。 CreateWindow
是CreateWindowA
的宏,需要ANSI输入。 CreateWindow("EDIT",...)
如果用Unicode编译程序,CreateWindow
是宽函数CreateWindowW
的宏,它使用Unicode参数CreateWindow(L"EDIT",...)
如果在Visual Studio中创建项目,则默认使用新的Unicode标准。在任何地方使用宽字符(L"Text"
)和Unicode函数。我建议用警告级别4编译程序。确保程序编译时没有警告。
答案 1 :(得分:3)
您想要回复发送到您的窗口过程的CBN_SELCHANGE
消息。在WM_COMMAND
的情况下,wParam的低位字将包含控制ID,高位字将包含可选的命令代码。
该命令代码对于正确响应组合框消息至关重要。您需要通过向CBN_SELCHANGE
然后CB_GETCURSEL
和CB_GETLBTEXTLEN
发送组合框来回复CB_GETLBTEXT
消息,之后您可以向编辑控件发送{{1检索到的文本。