?? helloworld.c
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/* File: helloworld.c */ #include <Xm/Xm.h> #include <Xm/PushB.h> void callback(Widget w, XtPointer client_data, XmPushButtonCallbackStruct *cbs) { printf("Hello World!\n"); } int main(int argc, char *argv[]) { int n; Arg args[3]; XtAppContext app; Widget toplevel, button; XmString label; //建立頂級(jí)窗口 toplevel = XtVaAppInitialize(&app, "HelloWorld", NULL, 0, &argc, argv, NULL, NULL); //建立按鈕上標(biāo)簽的字符串 label = XmStringCreateSimple("Hello World!"); //建立按鈕 n = 0; XtSetArg(args[n], XmNlabelString, label); n++; button = XmCreatePushButton(toplevel, "pushbutton", args, n); XtManageChild(button); XmStringFree(label); //設(shè)置回調(diào)函數(shù) XtAddCallback(button, XmNactivateCallback, (XtCallbackProc)callback, NULL); //顯示窗口 XtRealizeWidget(toplevel); //進(jìn)入事件循環(huán) XtAppMainLoop(app); }
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