gpt4 book ai didi

c - Gtk3 窗口背景图像

转载 作者:太空狗 更新时间:2023-10-29 16:09:11 25 4
gpt4 key购买 nike

我在 gtk+-3.0.12 中使用 C 语言(截至 2011 年 9 月 10 日的最新稳定版本)如何在顶部窗口上创建 png 背景图像,并仍然在窗口上放置其他小部件(如按钮)?我尝试了以下操作,但图像是在按钮上绘制的。

/*
* Compile with:
* gcc -Wextra -o cairo6 `pkg-config --cflags --libs gtk+-3.0` cairo6.c
*/

#include <gtk/gtk.h>
static cairo_surface_t *surface = NULL;
cairo_surface_t *image;

static gboolean
on_expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
cairo_t *cr;
surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
CAIRO_CONTENT_COLOR,
gtk_widget_get_allocated_width (widget),
gtk_widget_get_allocated_height (widget));

cr = gdk_cairo_create ( gtk_widget_get_window (GTK_WIDGET(widget)) );
cairo_set_source_surface (cr, image, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);

return TRUE;
}

int main(int argc, char *argv[])
{
GtkWidget *window;
gtk_init(&argc, &argv);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
image = cairo_image_surface_create_from_png("bdrop.png"); //Supply your own image here
g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
gtk_widget_set_app_paintable(window, FALSE);
gtk_window_set_position (GTK_WINDOW(window), GTK_WIN_POS_CENTER);
gtk_window_set_default_size (GTK_WINDOW(window), 800, 480);

GtkWidget *ebox = gtk_event_box_new ();
GtkWidget *button;
button = gtk_button_new_with_label("QUIT");
gtk_widget_set_halign (GTK_WIDGET(button),GTK_ALIGN_CENTER);
gtk_widget_set_valign (GTK_WIDGET(button),GTK_ALIGN_CENTER);
gtk_container_add (GTK_CONTAINER(ebox), button);
g_signal_connect (button, "clicked", G_CALLBACK (gtk_main_quit), NULL);

gtk_container_add (GTK_CONTAINER(window), ebox);
g_signal_connect(ebox,"draw", G_CALLBACK (on_expose_event),NULL);

gtk_widget_show_all (window);

gtk_main();
cairo_surface_destroy (image);
return 0;
}

最佳答案

检查以下代码是否适合您:

#include <gtk/gtk.h>

int main( int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *layout;
GtkWidget *image;
GtkWidget *button;

gtk_init(&argc, &argv);

window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 290, 200);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);

layout = gtk_layout_new(NULL, NULL);
gtk_container_add(GTK_CONTAINER (window), layout);
gtk_widget_show(layout);

image = gtk_image_new_from_file("/home/my_background_image.jpg");
gtk_layout_put(GTK_LAYOUT(layout), image, 0, 0);

button = gtk_button_new_with_label("Button");
gtk_layout_put(GTK_LAYOUT(layout), button, 150, 50);
gtk_widget_set_size_request(button, 80, 35);

g_signal_connect_swapped(G_OBJECT(window), "destroy",
G_CALLBACK(gtk_main_quit), NULL);

gtk_widget_show_all(window);

gtk_main();

return 0;
}

关于c - Gtk3 窗口背景图像,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7375624/

25 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com