我用命令在ubuntu上安装了gtk sudo apt-get install libgtk-3-dev
然后我将代码复制到vi编辑器
我在GTK中为helloworld复制了以下代码,这给出了编译错误
#include <gtk/gtk.h>
/* this is a callback function. the data arguments are ignored in this example..
* More on callbacks below. */
void hello (GtkWidget *widget, gpointer *data)
{
g_print ("Hello World\n");
}
/* another callback */
void destroy (GtkWidget *widget, gpointer *data)
{
gtk_main_quit ();
}
int main (int argc, char *argv[])
{
/* GtkWidget is the storage type for widgets */
GtkWidget *window;
GtkWidget *button;
/* this is called in all GTK applications. arguments are parsed from
* the command line and are returned to the application. */
gtk_init (&argc, &argv);
/* create a new window */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
/* when the window is given the "destroy" signal (this can be given
* by the application, or the window manager, the function destroy
* will be called as defined above. The data passed to the callback
* function is NULL and is ignored in the callback. */
gtk_signal_connect (GTK_OBJECT (window), "destroy",
GTK_SIGNAL_FUNC (destroy), NULL);
/* sets the border width of the window. */
gtk_container_border_width (GTK_CONTAINER (window), 10);
/* creates a new button with the label "Hello World". */
button = gtk_button_new_with_label ("Hello World");
/* When the button receives the "clicked" signal, it will call the
* function hello() passing it NULL as it's argument. The hello() function is
* defined above. */
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (hello), NULL);
/* This will cause the window to be destroyed by calling
* gtk_widget_destroy(window) when "clicked. Again, the destroy
* signal could come from here, or the window manager. */
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (gtk_widget_destroy),
GTK_OBJECT (window));
/* this packs the button into the window (a gtk container). */
gtk_container_add (GTK_CONTAINER (window), button);
/* the final step is to display this newly created widget... */
gtk_widget_show (button);
/* and the window */
gtk_widget_show (window);
/* all GTK applications must have a gtk_main(). Control ends here
* and waits for an event to occur (like a key press or mouse event). */
gtk_main ();
return 0;
}
然后我用
编译gcc -Wall -g HelloWorld.c -o hello_world -L/usr/X11R6/lib -lglib -lgdk -lgtk -lX11 -lXext -lm
它给出了编译错误
找到gtk.h给出的位置 /home/user/linux-3.13.0/tools/perf/ui/gtk/gtk.h
我想使用gtk从一个GPS坐标转向另一个使用最短路径的坐标。可能吗? gtkmap API怎么样?我在哪里可以找到更多细节和示例?
答案 0 :(得分:1)
我不确定,但你的代码似乎有点陈旧。我敢说它可能使用的是大约Gtk + 1.2的版本。
无论如何,我建议你阅读GNOME网站上的Gtk教程Getting Started with Gtk+。它的目标是Gtk + 3,目前版本为3.26(稳定版)。
要编译一个简单的Gtk + C应用程序,您将使用pkg-config将正确的路径转换为指示库。
让我们从之前指出的指南中选择一个非常简单的示例,并将其另存为 main.c
:
#include <gtk/gtk.h>
static void
print_hello (GtkWidget *widget,
gpointer data)
{
g_print ("Hello World\n");
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *window;
GtkWidget *grid;
GtkWidget *button;
/* create a new window, and set its title */
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "Window");
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
/* Here we construct the container that is going pack our buttons */
grid = gtk_grid_new ();
/* Pack the container in the window */
gtk_container_add (GTK_CONTAINER (window), grid);
button = gtk_button_new_with_label ("Button 1");
g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);
/* Place the first button in the grid cell (0, 0), and make it fill
* just 1 cell horizontally and vertically (ie no spanning)
*/
gtk_grid_attach (GTK_GRID (grid), button, 0, 0, 1, 1);
button = gtk_button_new_with_label ("Button 2");
g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);
/* Place the second button in the grid cell (1, 0), and make it fill
* just 1 cell horizontally and vertically (ie no spanning)
*/
gtk_grid_attach (GTK_GRID (grid), button, 1, 0, 1, 1);
button = gtk_button_new_with_label ("Quit");
g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
/* Place the Quit button in the grid cell (0, 1), and make it
* span 2 columns.
*/
gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 2, 1);
/* Now that we are done packing our widgets, we show them all
* in one go, by calling gtk_widget_show_all() on the window.
* This call recursively calls gtk_widget_show() on all widgets
* that are contained in the window, directly or indirectly.
*/
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;
}
然后用:
编译它gcc -o main main.c `pkg-config --cflags --libs gtk+-3.0`
关于地图问题,我建议libchamplain,演示文件夹中github project page上有一些示例。
不要忘记查看GNOME's Map申请及其github page。