#include <CtrlLib/CtrlLib.h>

using namespace Upp;

Array <Image> imgLst;

struct TestDisplay : Display {
	virtual void Paint(Draw& w, const Rect& r, const Value& q, Color ink, Color paper, dword style) const
	{
		w.DrawRect(r, paper);
		int id = q.Is<int>() ? (int)q : -1;
		if (id >= 0 && id < imgLst.GetCount()) {
			Rect rect(r.left, r.top, r.left+70, r.top+70);
			if (imgLst[id])
				w.DrawImage(rect, imgLst[id]);
			else
				Display::Paint(w, r, "Image not loaded", ink, paper, style);
		} else
			Display::Paint(w, r, "Image not available", ink, paper, style);
	}
};

struct App : TopWindow {
	ArrayCtrl a, b;
	Splitter  s;
	Thread threadPainter;
	
	void RefreshThumb(int row)
	{
		a.RefreshRow(row);	
	}
	void DnD(PasteClip& d)
	{
		if(AcceptText(d)) {
			a.Add(GetString(d), GetString(d));
			a.SetFocus();
		}
	}

	void DnDInsert(int line, PasteClip& d)
	{
		if(AcceptInternal<ArrayCtrl>(d, "array")) {
			a.InsertDrop(line, d);
			a.SetFocus();
		}
		if(AcceptText(d)) {
			a.Insert(line);
			a.Set(line, 0, GetString(d));
			a.SetCursor(line);
			a.SetFocus();
		}
	}

	void DnDInsertB(int line, PasteClip& d)
	{
		if(AcceptInternal<ArrayCtrl>(d, "array")) {
			const ArrayCtrl& src = GetInternal<ArrayCtrl>(d);
			bool self = &src == &b;
			Vector< Vector<Value> > data;
			for(int i = 0; i < src.GetCount(); i++)
				if(src.IsSel(i)) {
					Value v = src.Get(i, 0);
					data.Add().Add(IsNumber(v) ? FormatIntRoman((int)src.Get(i, 0)) : String(v));
				}
			b.InsertDrop(line, data, d, self);
			b.SetFocus();
		}
	}

	void Drag()
	{
		if(a.DoDragAndDrop(InternalClip(a, "array")) == DND_MOVE)
			a.RemoveSelection();
	}

	void DragB()
	{
		if(b.DoDragAndDrop(InternalClip(b, "array"), b.GetDragSample()) == DND_MOVE)
			b.RemoveSelection();
	}

	typedef App CLASSNAME;

	App();
};

void LoadImageThread(App *gui, Array <Image> *imgs)
{
	for (int i = 0; i < (*imgs).GetCount(); ++i) {
		for (int j = 0; j < gui->a.GetCount(); ++j) {
			Value ix = gui->a.Get(j, 0);
			if (ix.Is<int>() && i == ix) {
				if (!(*imgs)[ix]) {
					(*imgs)[ix] = StreamRaster::LoadFileAny("/mnt/C/demo.jpg");
					PostCallback(callback1(gui, &App::RefreshThumb, i));
				}
			}
		}
	}
}

App::App() 
{
	a.AddColumn("You can paste the text here too").SetDisplay(Single<TestDisplay>());
	a.MultiSelect();
	a.WhenDropInsert = THISBACK(DnDInsert);
	a.WhenDrop = THISBACK(DnD);
	a.WhenDrag = THISBACK(Drag);
	a.SetLineCy(70);
	
	b.AddColumn("Roman numbers");
	b.MultiSelect();
	b.WhenDropInsert = THISBACK(DnDInsertB);
	b.WhenDrag = THISBACK(DragB);

	Add(s.Horz(a, b));
	for(int i = 0; i < 25; i++) {
		a.Add(i);
		imgLst.Add();
		b.Add(FormatIntRoman(i, true));
	}
	Sizeable();
	
	threadPainter.Run(callback2(LoadImageThread, this, &imgLst));
}

GUI_APP_MAIN
{
	App().Run();
}