c - 如何在GtkEntry中设置占位符文本

我试过这个例子：

#include <stdio.h>
#include <stdlib.h>
#include <gtk/gtk.h>

GdkPixbuf *create_pixbuf(const gchar * filename) {
    GdkPixbuf *pixbuf;
    GError *error = NULL;
    pixbuf = gdk_pixbuf_new_from_file(filename, &error);

    if(!pixbuf) {
        fprintf(stderr, "%s\n", error->message);    g_error_free(error);
    }

    return pixbuf;
}

void implement() {
    printf("HI");
}

int main( int argc, char *argv[]) {
    GtkWidget *window;
    GtkWidget *frame;
    GtkWidget *label;
    GtkWidget *text;

    gtk_init(&argc, &argv);
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "New Message");
    gtk_window_set_default_size(GTK_WINDOW(window), 310, 390);
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
    gtk_window_set_icon(GTK_WINDOW(window), create_pixbuf("web.png"));

    frame = gtk_fixed_new();
    gtk_container_add(GTK_CONTAINER(window), frame);

    text = gtk_entry_new();
    gtk_entry_set_max_length (GTK_ENTRY (text), 0);
    gtk_entry_set_width_chars (GTK_ENTRY (text), 37);
    gtk_entry_set_placeholder_text(GTK_ENTRY (text), "Send a message");
    gtk_fixed_put(GTK_FIXED(frame), text, 2, 360);

    gtk_widget_show_all(window);

    g_signal_connect(window, "destroy", G_CALLBACK (gtk_main_quit), NULL);

    gtk_main();

    return 0;
}

但出现错误：undefined reference to gtk_entry_set_placeholder_text'`

最佳答案

确保您的GTK +版本是3.2或更高版本，因为那是添加该特定功能的时间。

关于c - 如何在GtkEntry中设置占位符文本，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/23470502/