/*
 * Copyright 2016-2024 Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *              DarkWyrm, darkwyrm@earthlink.net
 *              John Scipione, jscipione@gmail.com
 */


#include <ColorListView.h>

#include <algorithm>

#include <math.h>
#include <stdio.h>

#include <Bitmap.h>
#include <ColorItem.h>
#include <String.h>


// golden ratio
#ifdef M_PHI
#       undef M_PHI
#endif
#define M_PHI 1.61803398874989484820


namespace BPrivate {


//      #pragma mark - ColorListView


BColorListView::BColorListView(const char* name, list_view_type type, uint32 flags)
        :
        BListView(name, type, flags)
{
}


BColorListView::~BColorListView()
{
}


bool
BColorListView::InitiateDrag(BPoint where, int32 index, bool wasSelected)
{
        BColorItem* item = dynamic_cast<BColorItem*>(ItemAt(index));
        if (item == NULL)
                return false;

        rgb_color color = item->Color();

        BString hexStr;
        hexStr.SetToFormat("#%.2X%.2X%.2X", color.red, color.green, color.blue);

        BMessage message(B_PASTE);
        message.AddData("text/plain", B_MIME_TYPE, hexStr.String(), hexStr.Length());
        message.AddData("RGBColor", B_RGB_COLOR_TYPE, &color, sizeof(color));
        message.AddMessenger("be:sender", BMessenger(this));
        message.AddPointer("source", this);
        message.AddInt64("when", (int64)system_time());

        float itemHeight = item->Height() - 5;
        BRect rect(0, 0, roundf(itemHeight * M_PHI) - 1, itemHeight - 1);

        BBitmap* bitmap = new BBitmap(rect, B_RGB32, true);
        if (bitmap->Lock()) {
                BView* view = new BView(rect, "", B_FOLLOW_NONE, B_WILL_DRAW);
                bitmap->AddChild(view);

                view->SetHighColor(B_TRANSPARENT_COLOR);
                view->FillRect(view->Bounds());

                ++rect.top;
                ++rect.left;

                view->SetHighColor(0, 0, 0, 100);
                view->FillRect(rect);
                rect.OffsetBy(-1, -1);

                int32 red = (int32)std::min(255, (int)(1.2 * color.red + 40));
                int32 green = (int32)std::min(255, (int)(1.2 * color.green + 40));
                int32 blue = (int32)std::min(255, (int)(1.2 * color.blue + 40));

                view->SetHighColor(red, green, blue);
                view->StrokeRect(rect);

                ++rect.left;
                ++rect.top;

                red = (int32)(0.8 * color.red);
                green = (int32)(0.8 * color.green);
                blue = (int32)(0.8 * color.blue);

                view->SetHighColor(red, green, blue);
                view->StrokeRect(rect);

                --rect.right;
                --rect.bottom;

                view->SetHighColor(color.red, color.green, color.blue);
                view->FillRect(rect);
                view->Sync();

                bitmap->Unlock();
        }

        DragMessage(&message, bitmap, B_OP_ALPHA, BPoint(14, 14));

        return true;
}


void
BColorListView::MouseUp(BPoint where)
{
        // TODO drag and drop from an external view should not alter selection
        BView::MouseUp(where);
}


} // namespace BPrivate