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using Gtk;
using System;
namespace Stetic {
public class Placeholder : Gtk.DrawingArea, IEditableObject
{
// This id is used by the undo methods to identify a child of a container.
string undoId;
public Placeholder ()
{
undoId = WidgetUtils.GetUndoId ();
DND.DestSet (this, true);
Events |= Gdk.EventMask.ButtonPressMask;
WidgetFlags |= WidgetFlags.AppPaintable;
}
internal string UndoId {
get { return undoId; }
set { undoId = value; }
}
const int minSize = 10;
protected override void OnSizeRequested (ref Requisition req)
{
base.OnSizeRequested (ref req);
if (req.Width <= 0)
req.Width = minSize;
if (req.Height <= 0)
req.Height = minSize;
}
protected override void OnRealized ()
{
base.OnRealized ();
}
protected override bool OnExposeEvent (Gdk.EventExpose evt)
{
if (!IsDrawable)
return false;
int width, height;
GdkWindow.GetSize (out width, out height);
Gdk.Rectangle a = new Gdk.Rectangle (0,0,width,height);
byte b2 = 210;
int ssLT = 12;
int ssRB = 7;
double grey = 0.6;
double greyb1 = 0.9;
double greyb2 = 0.6;
Gdk.Rectangle rect = a;
Cairo.Color back1 = new Cairo.Color (greyb1, greyb1, greyb1);
Cairo.Color back2 = new Cairo.Color (greyb2, greyb2, greyb2);
Cairo.Color cdark = new Cairo.Color (grey, grey, grey, 1);
Cairo.Color clight = new Cairo.Color (grey, grey, grey, 0);
using (Cairo.Context cr = Gdk.CairoHelper.Create (evt.Window)) {
DrawGradient (cr, rect, 0, 0, 1, 1, back1, back2);
rect.X = a.X;
rect.Y = a.Y;
rect.Height = ssLT;
rect.Width = a.Width;
DrawGradient (cr, rect, 0, 0, 0, 1, cdark, clight);
rect.Y = a.Bottom - ssRB;
rect.Height = ssRB;
DrawGradient (cr, rect, 0, 0, 0, 1, clight, cdark);
rect.X = a.X;
rect.Y = a.Y;
rect.Width = ssLT;
rect.Height = a.Height;
DrawGradient (cr, rect, 0, 0, 1, 0, cdark, clight);
rect.X = a.Right - ssRB;
rect.Width = ssRB;
DrawGradient (cr, rect, 0, 0, 1, 0, clight, cdark);
Gdk.GC gc = new Gdk.GC (GdkWindow);
gc.RgbBgColor = new Gdk.Color (b2,b2,b2);
gc.RgbFgColor = new Gdk.Color (b2,b2,b2);
GdkWindow.DrawRectangle (gc, false, a.X, a.Y, a.Width, a.Height);
gc.Dispose ();
}
return base.OnExposeEvent (evt);
}
void DrawGradient (Cairo.Context cr, Gdk.Rectangle rect, int fx, int fy, int fw, int fh, Cairo.Color c1, Cairo.Color c2)
{
cr.NewPath ();
cr.MoveTo (rect.X, rect.Y);
cr.RelLineTo (rect.Width, 0);
cr.RelLineTo (0, rect.Height);
cr.RelLineTo (-rect.Width, 0);
cr.RelLineTo (0, -rect.Height);
cr.ClosePath ();
// FIXME: VV: Remove gradient features
using (var pat = new Cairo.LinearGradient (rect.X + rect.Width*fx, rect.Y + rect.Height*fy, rect.X + rect.Width*fw, rect.Y + rect.Height*fh)) {
pat.AddColorStop (0, c1);
pat.AddColorStop (1, c2);
cr.Source = pat;
cr.FillPreserve ();
}
}
bool IEditableObject.CanDelete {
get { return true; }
}
bool IEditableObject.CanPaste {
get { return true; }
}
bool IEditableObject.CanCut {
get { return false; }
}
bool IEditableObject.CanCopy {
get { return false; }
}
void IEditableObject.Delete ()
{
Stetic.Wrapper.Container wc = Stetic.Wrapper.Container.LookupParent (this);
if (wc != null)
wc.Delete (this);
}
void IEditableObject.Paste ()
{
Clipboard.Paste (this);
}
void IEditableObject.Cut ()
{
}
void IEditableObject.Copy ()
{
}
}
}
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