Sure, just notice the variable "testje". In method on_mouse_movement,
the variable is NOT 12:
using Gtk;
using Goo;
using Gdk;
public class ScrapItem {
public static bool ItemDrag = false;
public double testje = 12;
public ScrapItem (Canvas canvas, string GraphItem, int x, int y, int
height, int width) {
Gdk.Pixbuf pixbuf;
CanvasItem root;
CanvasImage scrap_item;
CanvasRect scrap_item_border;
CanvasGroup scrap_item_group;
pixbuf = new Gdk.Pixbuf.from_file(GraphItem);
root = canvas.get_root_item();
this.testje = 12;
stdout.printf("%f\n", this.testje);
scrap_item_group = CanvasGroup.create(root);
scrap_item = CanvasImage.create(scrap_item_group,pixbuf,x,y);
scrap_item.scale_to_fit = true;
scrap_item.height = height;
scrap_item.width = width;
scrap_item_border =
CanvasRect.create(scrap_item_group,scrap_item.x,scrap_item.y,scrap_item.width,scrap_item.height);
scrap_item_border.stroke_color = "black";
scrap_item.button_press_event.connect(on_button_pressed);
scrap_item.button_release_event.connect(on_button_released);
scrap_item.motion_notify_event.connect(on_mouse_movement);
scrap_item.enter_notify_event.connect(()
=> {
scrap_item_border.stroke_color = "grey";
return true;
});
scrap_item.leave_notify_event.connect(()
=> {
scrap_item_border.stroke_color = "black";
return true;
});
}
private bool on_button_pressed(Goo.CanvasItem Item,
Gdk.EventButton EventButton) {
if (EventButton.button == 1)
this.ItemDrag = true;
return true;
}
private bool on_button_released(Goo.CanvasItem Item,
Gdk.EventButton EventButton) {
this.ItemDrag = false;
return true;
}
private bool on_mouse_movement(Goo.CanvasItem Item,
Gdk.EventMotion EventMotion) {
CanvasItem Group;
double x = 0, y = 0;
Group = Item.get_parent();
if (this.ItemDrag == true) {
// this.testje is empty !?!
stdout.printf("%f %f %f - %f %f\n", this.testje, x, y,
EventMotion.x, EventMotion.y);
Group.translate(EventMotion.x, EventMotion.y);
}
x = EventMotion.x;
y = EventMotion.y;
return false;
}
}
public class CanvasSample : Gtk.Window
{
private const int SIZE = 30;
public CanvasSample ()
{
this.title = "Canvas Vala Demo";
this.destroy.connect (Gtk.main_quit);
set_default_size (600, 600);
var canvas = new Canvas();
var bg = new
ScrapItem(canvas,"/home/fred/dev/vala/training/test3/paper.jpg",0,0,600,600);
var ScrapItem1 = new
ScrapItem(canvas,"/home/fred/dev/vala/training/test3/photo1.jpg",30,30,300,300);
var ScrapItem2 = new
ScrapItem(canvas,"/home/fred/dev/vala/training/test3/photo2.jpg",60,60,300,300);
add (canvas);
}
static int main (string[] args)
{
Gtk.init (ref args);
var canvas_sample = new CanvasSample ();
canvas_sample.show_all();
Gtk.main ();
return 0;
}
}
Greetz,
Fred
2011/7/25 Luca Bruno <[email protected]>:
> On Mon, Jul 25, 2011 at 01:55:41PM +0200, Fred van Zwieten wrote:
>> Hi all,
>>
>> Warning: vala noob.
>>
>> I have a instance variable and gave it a value in the class constructor.
>>
>> The variable is accessible in other methods in the same class (i.e.
>> this.foo) but it doesn't have the value set in the constructor. Why
>> not? This is also true for initial value assignment (public int foo =
>> 12)
>>
>> When I set it in another method (not the constructor) all is well.
>
> Hi, can you show a test case please?
>
> --
> http://www.debian.org - The Universal Operating System
>
_______________________________________________
vala-list mailing list
[email protected]
http://mail.gnome.org/mailman/listinfo/vala-list
