c - GTK : Visual Studio Issue

Question

出于开发原因，我必须构建 GTK 堆栈的调试版本。 构建它之后，我为 GTK 设置了 pkg-config，下面是我的 Visual Studio 中的示例程序

#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;
}

下面是我的 pkg-config --cflags gtk-3-vs12 --msvc-syntax，我已将其包含在项目属性 -> C/C++ -> 命令行 -> 其他选项中:

/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 

下面是我的 pkg-config --libs gtk-3-vs12 --msvc-syntax，我已将其包含在项目属性 -> 链接器 -> 命令行 -> 其他选项中:

/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 

我仍然收到以下错误:

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

谁能启发我解决这个问题？

Answer 1

首先，常量名称不是GTK_WINDOW_TOP_LEVEL，而是GTK_WINDOW_TOPLEVEL。

其次，您需要先声明key_press_event()，然后才能在main() 中引用它。您有两个选择:将函数本身移动到 main() 之前，或者添加行

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。