GTK :问题

Question

出于开发原因，我不得不构建GTK堆栈的调试版本。构建之后，我在Visual中为GTK和更低版本设置了pkg-config，这是我的示例程序。

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

int main(int argv, char* argc)
{
    GtkWidget *window, *label;
    gtk_init(&argv, &argc);
    window = gtk_window_new(GTK_WINDOW_TOP_LEVEL);
    gtk_window_set_title(GTK_WINDOW(window), "Window");
    gtk_window_set_size_request(window, 300, 100);
    label = gtk_label_new("Click Me");
    gtk_label_set_selectable(GTK_LABEL(label), TRUE);
    gtk_container_add(GTK_CONTAINER(window), label);
    g_signal_connect(G_OBJECT(window), "key_press_event", G_CALLBACK(key_press_event), label);
    gtk_window_show_all(window);
    gtk_main();
}

static gboolean key_press_event(GtkWidget* window, GdkEvent* event, gpointer label)
{
    GtkWidget* newlabel;
    newlabel = GTK_LABEL(label);
    const gchar wtitle[100];
    strncpy(wtitle, gtk_window_get_title(GTK_WINDOW(window)), sizeof(wtitle));
    gtk_window_set_title(GTK_WINDOW(window),gtk_label_get_text(GTK_LABEL(newlabel)));
    gtk_label_set_text(GTK_LABEL(newlabel), wtitle);
    return false;
}

下面是我在Properties中包含的pkg-config --cflags gtk-3-vs12 --msvc-syntax，-> C/C++ ->命令行->附加选项：

/Ic:/gtk_compilation/vs12/win32/include /Ic:/gtk_compilation/vs12/win32/include/gtk /Ic:/gtk_compilation/vs12/win32/include/gdk /Ic:/gtk_compilation/vs12/win32/include/pango /Ic:/gtk_compilation/vs12/win32/include/atk /Ic:/gtk_compilation/vs12/win32/include/cairo  /Ic:/gtk_compilation/vs12/win32/include/fontconfig /Ic:/gtk_compilation/vs12/win32/include/gdk-pixbuf /Ic:/gtk_compilation/vs12/win32/include/glib 

下面是我在“项目属性”( Properties )、“链接器”( pkg-config --libs gtk-3-vs12 --msvc-syntax )、“命令行”( -> )、“命令行”( -> )上包含的其他选项：

/libpath:c:/gtk_compilation/vs12/win32/lib gtk-3-vs12.lib gdk3-win32.lib gdi32.lib imm32.lib shell32.lib ole32.lib -Wl,-luuid pangocairo.lib pangowin32.lib pango-1-vs12.lib m.lib atk-1-vs12.lib cairo-gobject.lib cairo-vs10.lib gdk_pixbuf-2-vs12.lib gio-2-vs12.lib gobject-2-vs12.lib glib-2-vs12.lib intl.lib 

不过，我还是会犯以下错误：

Error   9   error C2065: 'false' : undeclared identifier    c:\users\sajith\documents\visual studio 2013\projects\consoleapplication8\consoleapplication8\testapp.c 28  1   ConsoleApplication8
Error   3   error C2065: 'GTK_WINDOW_TOP_LEVEL' : undeclared identifier c:\users\sajith\documents\visual studio 2013\projects\consoleapplication8\consoleapplication8\testapp.c 9   1   ConsoleApplication8
Error   5   error C2065: 'key_press_event' : undeclared identifier  c:\users\sajith\documents\visual studio 2013\projects\consoleapplication8\consoleapplication8\testapp.c 15  1   ConsoleApplication8

有人能指点我理清这件事吗？

Answer 1

首先，常量名不是GTK_WINDOW_TOP_LEVEL，而是GTK_WINDOW_TOPLEVEL。

其次，需要声明key_press_event()，然后才能在main()中引用它。您有两个选项:要么将函数本身移动到main()之前，要么添加行

static gboolean key_press_event(GtkWidget* window, GdkEvent* event, gpointer label);

在main()之前。

第三，您希望key_press_event()返回FALSE，而不是false。