设置 Motif 窗口的标题 [英] Setting the title of a Motif Window

问题描述

我正在尝试设置顶级 Motif 2.1 窗口的标题.

I am trying to set the title of a toplevel Motif 2.1 window.

从 O'Reilly 第六卷 A 中，我看到在 Motif 2.1 中建议 XtVaOpenApplication 创建顶级 Widget.

From O'Reilly Volume Six A, I have seen that in Motif 2.1 XtVaOpenApplication is recommended to create a toplevel Widget.

在本附录中，它可以了解如何使用 options 和 XtNumber(options) 通过参数列表对资源进行操作.

In this appendix it can be seen how options and XtNumber(options) are used to act on resources via argument list.

我尝试在调用程序时使用它来生成可选标志 -title WINDOW_TITLE，但没有成功.

I have tried to use it to generate an optional flag -title WINDOW_TITLE while invoking the program, without sucess.

这是我尝试过的:

#include <stdlib.h>
#include <stdio.h>
 
#include <Xm/Xm.h>
#include <Xm/PushB.h>
 
static XrmOptionDescRec options[] = {
    { "-title", "XmNtitle", XrmoptionIsArg, NULL },
};
 
int main(int argc, char *argv[]) {

    Widget          toplevel;             /* Top Level Button */
    XtAppContext    app;                  /* Application Context */
    char            *window_title = NULL; /* Top Level Window Title */
    
    /* INITIALIZE TOP LEVEL WINDOW */
    XtSetLanguageProc(NULL, NULL, NULL);
    toplevel = XtVaOpenApplication( &app, argv[0], options, XtNumber(options), &argc, argv, NULL, sessionShellWidgetClass, NULL);
    
    /* REALIZE TOPLEVEL WINDOW AND LAUNCH APPLICATION LOOP */
    XtRealizeWidget(toplevel);
    XtAppMainLoop(app);
    
    return 0;

}

程序可以编译，但对 -title MYTITLE 命令行参数没有反应.

The program compiles but it does not react to -title MYTITLE command line argument.

这是 makefile(适用于 FreeBSD 12):

This is the makefile (works on FreeBSD 12):

test:           test.o
                cc -L/usr/local/lib -O -o test test.o -lXm -lXt -lX11

test.o:         test.c
                cc -I/usr/local/include -c test.c

如何根据名为 -title 的可选参数更改窗口的标题?

How can I change the title of the window based on an optional argument named -title?

推荐答案

正确的 xrm 选项行是

The correct xrm option line is

{"-title", ".title", XrmoptionSepArg, NULL}

您实际上不需要指定它，因为它在默认的 Xt 选项表中.

You don't actually need to specify it because it is in the default Xt option table.

通常在指定 xrm 资源名称时省略 XmN.

In general you omit XmN when specifying xrm resource names.

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