如何正确替换 GtkEntry 的值
How to replace the value of GtkEntry properly
内部处理程序 clearHandle
和 replaceHandle
我正在尝试使用 gtk_entry_set_text 函数替换 GtkEntry
的值,但它对我不起作用。
这是我做的
#include <gtk/gtk.h>
void clearHandle(GtkEntry *e)
{
gtk_entry_set_text(e, "");
}
void replaceHandle(GtkEntry *e)
{
gtk_entry_set_text(e, "Hello World");
}
static void activate(GtkApplication *app, gpointer user_data)
{
GtkWidget *window;
GtkWidget *button_box;
GtkWidget *text_box;
GtkWidget *clearButton;
GtkWidget *replaceButton;
GtkWidget *textInputBox;
window = gtk_application_window_new(app);
gtk_window_set_title(GTK_WINDOW(window), "First GUI in c");
gtk_window_set_default_size(GTK_WINDOW(window), 600, 600);
// Containers and adding them to the window
button_box = gtk_button_box_new(GTK_ORIENTATION_VERTICAL);
text_box = gtk_fixed_new();
// Textbox inside container
textInputBox = gtk_entry_new();
gtk_entry_set_text((GtkEntry *)textInputBox, "Hello boom World");
clearButton = gtk_button_new_with_label("Clear");
replaceButton = gtk_button_new_with_label("Replace with hello World");
gtk_container_add(GTK_CONTAINER(button_box), textInputBox);
gtk_container_add(GTK_CONTAINER(button_box), clearButton);
gtk_container_add(GTK_CONTAINER(button_box), replaceButton);
g_signal_connect(clearButton, "clicked", G_CALLBACK(clearHandle), (GtkEntry *)textInputBox);
g_signal_connect(replaceButton, "clicked", G_CALLBACK(replaceHandle), (GtkEntry *)textInputBox);
gtk_container_add(GTK_CONTAINER(window), button_box);
gtk_widget_show_all(window);
}
int main(int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new("org.yk.dev", 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;
}
虽然 运行 我在终端中遇到以下错误
(main:14233): Gtk-CRITICAL **: 06:08:43.524: gtk_entry_set_text: assertion 'GTK_IS_ENTRY (entry)' failed
(main:14233): Gtk-CRITICAL **: 06:08:44.188: gtk_entry_set_text: assertion 'GTK_IS_ENTRY (entry)' failed
The clicked
signal 给出两个参数:第一个是被点击的 GtkButton *
, 然后是 用户数据指针。您的回调需要将 GtkButton *
作为第一个参数(即使您不使用它);目前它试图使用按钮作为入口,这就是为什么你得到“'GTK_IS_ENTRY (entry)' 失败”。
内部处理程序 clearHandle
和 replaceHandle
我正在尝试使用 gtk_entry_set_text 函数替换 GtkEntry
的值,但它对我不起作用。
这是我做的
#include <gtk/gtk.h>
void clearHandle(GtkEntry *e)
{
gtk_entry_set_text(e, "");
}
void replaceHandle(GtkEntry *e)
{
gtk_entry_set_text(e, "Hello World");
}
static void activate(GtkApplication *app, gpointer user_data)
{
GtkWidget *window;
GtkWidget *button_box;
GtkWidget *text_box;
GtkWidget *clearButton;
GtkWidget *replaceButton;
GtkWidget *textInputBox;
window = gtk_application_window_new(app);
gtk_window_set_title(GTK_WINDOW(window), "First GUI in c");
gtk_window_set_default_size(GTK_WINDOW(window), 600, 600);
// Containers and adding them to the window
button_box = gtk_button_box_new(GTK_ORIENTATION_VERTICAL);
text_box = gtk_fixed_new();
// Textbox inside container
textInputBox = gtk_entry_new();
gtk_entry_set_text((GtkEntry *)textInputBox, "Hello boom World");
clearButton = gtk_button_new_with_label("Clear");
replaceButton = gtk_button_new_with_label("Replace with hello World");
gtk_container_add(GTK_CONTAINER(button_box), textInputBox);
gtk_container_add(GTK_CONTAINER(button_box), clearButton);
gtk_container_add(GTK_CONTAINER(button_box), replaceButton);
g_signal_connect(clearButton, "clicked", G_CALLBACK(clearHandle), (GtkEntry *)textInputBox);
g_signal_connect(replaceButton, "clicked", G_CALLBACK(replaceHandle), (GtkEntry *)textInputBox);
gtk_container_add(GTK_CONTAINER(window), button_box);
gtk_widget_show_all(window);
}
int main(int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new("org.yk.dev", 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;
}
虽然 运行 我在终端中遇到以下错误
(main:14233): Gtk-CRITICAL **: 06:08:43.524: gtk_entry_set_text: assertion 'GTK_IS_ENTRY (entry)' failed
(main:14233): Gtk-CRITICAL **: 06:08:44.188: gtk_entry_set_text: assertion 'GTK_IS_ENTRY (entry)' failed
The clicked
signal 给出两个参数:第一个是被点击的 GtkButton *
, 然后是 用户数据指针。您的回调需要将 GtkButton *
作为第一个参数(即使您不使用它);目前它试图使用按钮作为入口,这就是为什么你得到“'GTK_IS_ENTRY (entry)' 失败”。