在gtk中打印对话框中的输入框的值c

我试图在一个对话框而不是在主窗口（like here）两个回调之间进行通信。但是，与链接中的解决方案不同，该程序会压碎（在第二次回调中，当我尝试使用从参数获得的小部件时）。

这是我这段代码：

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

static void print_text (GtkWidget *widget, gpointer data) 
{ 
    GtkEntry* entry = data; 
    printf("%s", gtk_entry_get_text(entry)); 
} 

static void open_dialog (GtkWidget *widget, gpointer data) 
{ 
    GtkWidget *window = data; 
    GtkWidget *dialog; 
    GtkWidget *content_area; 
    GtkWidget *grid; 
    GtkWidget *label; 
    GtkWidget *button; 
    static GtkEntry *textbox; 

    dialog = gtk_dialog_new_with_buttons ("Get Text", 
              window, 
              GTK_DIALOG_MODAL, 
              GTK_STOCK_OK, 
              GTK_RESPONSE_OK, 
              NULL); 
    content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog)); 
    grid = gtk_grid_new(); 
    gtk_container_add (GTK_CONTAINER (content_area), grid); 

    label = gtk_label_new("Value: "); 
    gtk_grid_attach(GTK_GRID(grid), label, 0, 0, 1, 1); 
    textbox = gtk_entry_new(); 
    gtk_entry_set_text(textbox, "<Value>"); 
    gtk_grid_attach(GTK_GRID(grid), textbox, 1, 0, 1, 1); 

    gtk_widget_show_all (dialog); 
    g_signal_connect (GTK_DIALOG (dialog), "response", G_CALLBACK (print_text), textbox); 
} 

static void activate (GtkApplication *app, gpointer user_data) 
{ 
    GtkWidget *window; 
    GtkWidget *button; 
    GtkWidget *entry; 
    GtkWidget *grid; 

    window = gtk_application_window_new (app); 
    gtk_window_set_title (GTK_WINDOW (window), "Window"); 
    gtk_container_set_border_width (GTK_CONTAINER (window), 10); 

    grid = gtk_grid_new(); 
    gtk_container_add (GTK_CONTAINER (window), grid); 

    button = gtk_button_new_with_label ("Print Text"); 
    g_signal_connect (button, "clicked", G_CALLBACK (open_dialog), window); 
    gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 1, 1); 

    gtk_widget_show_all (window); 
} 

int main (int argc, char **argv) 
{ 
    GtkApplication *app; 
    int status; 

    app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE); 
    g_signal_connect (app, "activate", G_CALLBACK (activate), NULL); 
    status = g_application_run (G_APPLICATION (app), argc, argv); 
    g_object_unref (app); 

    return status; 
}

该方案应该已经印在输入框中的值对话框中关闭对话框后。注意：在主窗口中有一个打开对话框的按钮。

感谢您的帮助！

来源

2017-07-09 Raz Omry

@josé-也许你可以帮我吗？ –

问题在于print_text函数。原型为GtkDialog response signal是：

无效user_function（GtkDialog *对话框， GINT RESPONSE_ID， gpointer USER_DATA）

所以，您必须将功能更改为：

static void print_text (GtkWidget *widget, gint response_id, gpointer data) 
{ 
    GtkEntry* entry = data; 
    printf("%s", gtk_entry_get_text(entry)); 
    gtk_widget_destroy (widget); // This will close the dialog 
}

来源

2017-07-09 17:29:10

非常感谢！ –

在gtk中打印对话框中的输入框的值c

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