检测标签页中的按钮按下

Question

我正在使用WinAPI创建一个GUI实用程序。我有两个选项卡，每个选项卡都有一些按钮。我正在使用此功能创建按钮：

CreateWindowEx(NULL,"button", "Clear", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
150, 175, 100, 25, tab_window_2, (HMENU) CLEAR_DATA, instance_handle, NULL);

在 Windows proc 功能中，我不知道如何检测何时按下上述按钮。我还尝试在WM_COMMAND开关结构中处理CLEAR_DATA，如下所示。

switch ( message ) {  
case WM_COMMAND:{
switch(LOWORD(wparam)) {
case CLEAR_DATA : break
}
}

如何检测和处理被按下的按钮？

我正在创建tab_window_2选项卡，如下所示：

class frame_window {  
private:
LPCSTR window_class_name;  
HINSTANCE instance_handle;  
HCURSOR cursor_arrow;  
HWND window_handle;
HWND tab_handle;
HWND tab_window_1;
HWND tab_window_2;
HWND current_tab_window;
RECT client_rectangle;   
public:
frame_window(LPCSTR window_class_identity) : window_class_name(window_class_identity) {  
INITCOMMONCONTROLSEX common_controls; 
common_controls.dwSize = sizeof(INITCOMMONCONTROLSEX); 
common_controls.dwICC = ICC_BAR_CLASSES; 
InitCommonControlsEx(&common_controls); 
int screen_width = GetSystemMetrics(SM_CXFULLSCREEN);  
int screen_height = GetSystemMetrics(SM_CYFULLSCREEN);  
instance_handle = GetModuleHandle(NULL);  
WNDCLASS window_class = { CS_OWNDC, main_window_proc, 0, 0,    
instance_handle, NULL,    
NULL, NULL, NULL,    
window_class_name };   
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   
// Create a standard frame window   
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   
RegisterClass(&window_class);   
window_handle = CreateWindowEx(WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE,    
window_class_name,    
"IR Remote and Barcode Demo",   
WS_OVERLAPPEDWINDOW | 
WS_CLIPCHILDREN | WS_CLIPSIBLINGS,   
100, 100, screen_width-1600,    
screen_height-490, NULL, NULL,   
instance_handle, NULL);

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Get the size of the client rectangle for the window we have just created
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
RECT client_rect; 
GetClientRect(window_handle, &client_rect); 
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Create the tab control window.
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tab_handle = CreateWindowEx(NULL, WC_TABCONTROL, NULL,
WS_CHILD | WS_VISIBLE,
10, 10, client_rect.right-client_rect.left-20,
client_rect.bottom-client_rect.top-10,
window_handle, NULL, 
instance_handle, NULL);
// Create three tabs.
TCITEM tab_info;
memset(&tab_info, 0, sizeof(tab_info));
tab_info.mask = TCIF_TEXT;
tab_info.pszText = "tab#1";
tab_info.cchTextMax = 5;
SendMessage(tab_handle, TCM_INSERTITEM, 0, (LPARAM)&tab_info);
tab_info.pszText = "tab#2";
SendMessage(tab_handle, TCM_INSERTITEM, 1, (LPARAM)&tab_info);
RECT tab_rectangle;
GetClientRect(tab_handle, &tab_rectangle);
SendMessage(tab_handle, TCM_ADJUSTRECT, FALSE, (LPARAM)&tab_rectangle);
// Create the tab view windows
tab_window_1 = CreateWindowEx(NULL, "STATIC", "  ",
WS_CHILD | WS_VISIBLE|SS_OWNERDRAW,
tab_rectangle.left+10, tab_rectangle.top+10, 
tab_rectangle.right-tab_rectangle.left,
tab_rectangle.bottom -tab_rectangle.top,
tab_handle, (HMENU)1, 
instance_handle, NULL);
SetParent(tab_window_1, window_handle);
current_tab_window = tab_window_1;
tab_window_2 = CreateWindowEx(NULL, "STATIC", " ",
WS_CHILD|SS_OWNERDRAW,
tab_rectangle.left+10, tab_rectangle.top+10, 
tab_rectangle.right-tab_rectangle.left,
tab_rectangle.bottom -tab_rectangle.top,
tab_handle, (HMENU)2, 
instance_handle, NULL);

CreateWindowEx(NULL,"button", "Clear", WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
150, 175, 100, 25, tab_window_2, (HMENU) CLEAR_DATA, instance_handle, NULL);
SetParent(tab_window_2, window_handle);
SetCursor(LoadCursor(NULL, IDC_ARROW)); 
SetWindowLongPtr(window_handle, GWL_USERDATA, (LONG)this);  
ShowWindow(window_handle, SW_SHOW);   
UpdateWindow(window_handle); 
}  
~frame_window() {  
UnregisterClass(window_class_name, instance_handle);   
}  
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   
// Windows main entry point   
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++   
int WINAPI wWinMain(HINSTANCE instance_handle, HINSTANCE, LPWSTR, INT) {  
frame_window main_window("my base window");  
main_window.run();  
return 0;   
}

Answer 1

用于处理来自按钮的事件的WM_COMMAND必须位于其父级的窗口过程中。代码将tab_window_2显示为CLEAR_DATA按钮的父级。

在右侧的窗口进程(或对话框进程)中移动WM_COMMAND代码。

编辑：我想你不明白选项卡控件是如何工作的。 如果希望每个选项卡视图包含多个虚拟静态控件，则应使用选项卡控件的子级无模式和无边框对话框，并根据TCN_SELCHANGE通知显示/隐藏它们。

如果您真的不需要对话框功能，则可以创建常规子窗口(使用 RegisterClass/CreateWindow)，然后将控件添加为子窗口。

在任何一种情况下，显示/隐藏代码都必须对TCN_SELCHANGE做出反应。

对于常规子窗口或对话框，最终效果是相同的：您将有一个窗口过程或对话框程序，其中WM_COMMAND将处理用户操作。

不要和SetParent玩.但是，如果您绝对想要它，请使用：

HWND hWndPushClear = CreateWindowEx(NULL,"button", "Clear", [...]
SetParent( hWndPushClear, window_handle );

但是，您可能会遇到奇怪的绘画/焦点问题。

编辑：不幸的是，似乎没有好的选项卡控件教程。 我建议更新您的实际源代码。首先，请执行以下操作：

将

1. CreateWindowEx替换为 CreateDialog 以tab_window_1结束tab_window_2(只有一个对话框必须可见)
2. 抑制所有SetParent呼叫

Answer 2

您的CreateWindowEx()和WM_COMMAND代码似乎是正确的。 所以

1. 检查CreateWindowEx()的返回值是否为NULL。NULL表示无法创建控件。
2. 检查父级的HWND是否有效。在您的代码中，它是tab_window_2.

另外，如果您不想使用任何WS_EX_XXX样式，则可以使用CreateWindow().

此代码只是示例。

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
switch(iMessage) {
case WM_CREATE:
CreateWindow("button","Clear",WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
20,20,100,25,hWnd,(HMENU)0,g_hInst,NULL);
return 0;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case 0:
MessageBox(hWnd,"Clear Button Clicked","Button",MB_OK);
break;
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return(DefWindowProc(hWnd,iMessage,wParam,lParam));

}