pixbuf

实现非规则按钮的不同状态图片切换。PNG透明效果的按钮

只是一些技术验证的代码，自己去好好封装一下就ok拉。

#include <gtk/gtk.h>

gint mouse_event_handle(GtkWidget *widget, GdkEventButton *event, gpointer data)
{
    switch(event->button) {
        case 1:
            printf("Left ");
            break;
        case 2:
            printf("Middle ");
            break;
        case 3:
            printf("Right ");
            break;
        default:
            printf("Unknown ");
    }
   
    GdkPixbuf *pixbuf;
    GdkPixmap *pixmap;
    GdkBitmap *bitmap;
    GtkWidget *oldImage;
    GtkWidget *newImage;
    switch(event->type){
        case GDK_BUTTON_PRESS:
            printf("Mouse button press at (%.2f, %.2f)/n", event->x, event->y);
            oldImage = GTK_WIDGET(gtk_container_children(GTK_CONTAINER(widget))->data);
            gtk_object_ref(GTK_OBJECT(oldImage));
            gtk_container_remove(GTK_CONTAINER(widget), oldImage);
            pixbuf = gdk_pixbuf_new_from_file ("./press.png", NULL);
            newImage = gtk_image_new_from_pixbuf (pixbuf);
            gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap, 128);
            gtk_widget_shape_combine_mask(widget, bitmap, 0, 0);
            gtk_container_add(GTK_CONTAINER(widget), newImage);
            gtk_widget_show(newImage);
            break;
        case GDK_BUTTON_RELEASE:
            printf("Mouse button release at (%.2f, %.2f)/n", event->x, event->y);
            oldImage = GTK_WIDGET(gtk_container_children(GTK_CONTAINER(widget))->data);
            gtk_object_ref(GTK_OBJECT(oldImage));
            gtk_container_remove(GTK_CONTAINER(widget), oldImage);
            pixbuf = gdk_pixbuf_new_from_file ("./enter.png", NULL);
            newImage = gtk_image_new_from_pixbuf (pixbuf);
            gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap, 128);
            gtk_widget_shape_combine_mask(widget, bitmap, 0, 0);
            gtk_container_add(GTK_CONTAINER(widget), newImage);
            gtk_widget_show(newImage);
            break;
        case     GDK_ENTER_NOTIFY:
            printf("Mouse enter./n");
            oldImage = GTK_WIDGET(gtk_container_children(GTK_CONTAINER(widget))->data);
            gtk_object_ref(GTK_OBJECT(oldImage));
            gtk_container_remove(GTK_CONTAINER(widget), oldImage);
            pixbuf = gdk_pixbuf_new_from_file ("./enter.png", NULL);
            newImage = gtk_image_new_from_pixbuf (pixbuf);
            gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap, 128);
            gtk_widget_shape_combine_mask(widget, bitmap, 0, 0);
            gtk_container_add(GTK_CONTAINER(widget), newImage);
            gtk_widget_show(newImage);
            break;
        case GDK_LEAVE_NOTIFY:
            printf("Mouse leave./n");
            oldImage = GTK_WIDGET(gtk_container_children(GTK_CONTAINER(widget))->data);
            gtk_object_ref(GTK_OBJECT(oldImage));
            gtk_container_remove(GTK_CONTAINER(widget), oldImage);
            pixbuf = gdk_pixbuf_new_from_file ("./leave.png", NULL);
            newImage = gtk_image_new_from_pixbuf (pixbuf);
            gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap, 128);
            gtk_widget_shape_combine_mask(widget, bitmap, 0, 0);
            gtk_container_add(GTK_CONTAINER(widget), newImage);
            gtk_widget_show(newImage);
            break;
        default:
            printf("/n");
            break;
    }
    return FALSE;
}

int main(int argc, char *argv[])
{
    GtkWidget *window = NULL;
    GdkPixbuf *pixbuf = NULL;
    GdkPixmap *pixmap = NULL;
    GdkBitmap *bitmap = NULL;

    GtkWidget *image = NULL;
    GtkWidget *eventbox = NULL;
    GtkWidget *fixed = NULL;
   
    gtk_init(&argc,&argv);
   
    /* Create the window */
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"ZQButton  Demo");
    gtk_widget_set_events(window, GDK_SCROLL_MASK);
    gtk_widget_set_app_paintable(window,TRUE);
    gtk_widget_realize (window);
    //gtk_window_fullscreen(GTK_WINDOW(window));
    gtk_widget_set_size_request(window, 800, 600);
    g_signal_connect (G_OBJECT (window), "delete_event", G_CALLBACK (gtk_main_quit), NULL);
   
    fixed = gtk_fixed_new();
    gtk_container_add (GTK_CONTAINER(window), fixed);
    pixbuf = gdk_pixbuf_new_from_file ("./bg.jpg",NULL);
    pixmap = gdk_pixmap_new (fixed->window, gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf), -1);
    gdk_pixbuf_render_to_drawable(pixbuf, pixmap,
                fixed->style->fg_gc[GTK_STATE_NORMAL],
                0,0,0,0,
                gdk_pixbuf_get_width(pixbuf),
                gdk_pixbuf_get_height(pixbuf),
                GDK_RGB_DITHER_NORMAL,0,0);
    g_object_unref(pixbuf);
    gdk_window_set_back_pixmap (fixed->window, pixmap, FALSE);
    gtk_widget_show(fixed);

    eventbox=gtk_event_box_new();
    gtk_widget_set_events(eventbox, GDK_MOTION_NOTIFY | GDK_BUTTON_PRESS | GDK_BUTTON_RELEASE
         | GDK_ENTER_NOTIFY | GDK_LEAVE_NOTIFY);
       
    g_signal_connect(G_OBJECT(eventbox), "button_press_event", GTK_SIGNAL_FUNC(mouse_event_handle), NULL);
    g_signal_connect(G_OBJECT(eventbox), "button_release_event", GTK_SIGNAL_FUNC(mouse_event_handle), NULL);
    g_signal_connect(G_OBJECT(eventbox), "enter_notify_event", GTK_SIGNAL_FUNC(mouse_event_handle), NULL);
    g_signal_connect(G_OBJECT(eventbox), "leave_notify_event", GTK_SIGNAL_FUNC(mouse_event_handle), NULL);
    gtk_fixed_put (GTK_FIXED (fixed), eventbox, 10, 10);
    pixbuf = gdk_pixbuf_new_from_file ("./leave.png", NULL);
    image = gtk_image_new_from_pixbuf (pixbuf);
    gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap, 128);
    gtk_widget_shape_combine_mask(eventbox, bitmap, 0, 0);
   
    gtk_container_add(GTK_CONTAINER(eventbox), image);
    gtk_widget_show(image);
    gtk_widget_show(eventbox);
   
    gtk_widget_show(window);
    gtk_main();
    return FALSE;
}