#include "image_view.h"
#include <stdio.h>


LImageView::LImageView(const char *name, BBitmap *bitmap, BAlignment align) : BView(name, B_SUPPORTS_LAYOUT|B_FRAME_EVENTS|B_WILL_DRAW)
{
	SetBitmap(bitmap);
	SetAlignment(align);
}
void LImageView::SetBitmap(BBitmap *bitmap) {
	this->bitmap = bitmap;
	Invalidate();
}
void LImageView::SetAlignment(BAlignment align) {
	this->align = align;
	Invalidate();
}
BBitmap *LImageView::Bitmap() {
	return bitmap;
}
BAlignment LImageView::Alignment() {
	return align;
}

void LImageView::Draw(BRect updateRect) {
	if (bitmap == NULL) return; // Handle null image.
	int x = 0, y = 0;
	int mw, mh;
	int bw, bh;
	bw = bitmap->Bounds().Width();
	bh = bitmap->Bounds().Height();
	int iw = bw, ih = bh;
	mw = Bounds().Width();
	mh = Bounds().Height();
	float wr = ((float)mw) / ((float)bw);
	float hr = ((float)mh) / ((float)bh);
	if (wr < hr) {
		iw *= wr;
		ih *= wr;
	} else {
		iw *= hr;
		ih *= hr;
	}
		
		
	switch (align.Horizontal()) {
		case B_ALIGN_LEFT: {
			x = 0;
		} break;
		case B_ALIGN_HORIZONTAL_CENTER: {
		        x = (mw - iw) / 2;
		} break;
		case B_ALIGN_RIGHT: {
			x = mw - iw;
		} break;
	}
	switch (align.Vertical()) {
		case B_ALIGN_TOP: {
		        y = 0;
		} break;
		case B_ALIGN_VERTICAL_CENTER: {
			y = (mh - ih) / 2;
		} break;
		case B_ALIGN_BOTTOM: {
			y = mh - ih;
		} break;
	}
	BRect bitmap_rect(0, 0, bw, bh);
	BRect draw_rect(x, y, iw + x, ih + y);
	int left = updateRect.left;
	int right = updateRect.right;
	int top = updateRect.top;
	int bottom = updateRect.bottom;
	int x2 = x + bw;
	int y2 = y + bh;
	printf("Bitmap rect: (%f, %f) -> (%f, %f)\nView rect: (%f, %f) -> (%f, %f)\n", bitmap_rect.left, bitmap_rect.top, bitmap_rect.right, bitmap_rect.bottom, draw_rect.left, draw_rect.top, draw_rect.right, draw_rect.bottom);
	DrawBitmap(bitmap, bitmap_rect, draw_rect);
}

void LImageView::GetPreferredSize(float *w, float *h) {
	if (!bitmap) {
		*w = 0;
		*h = 0;
		return;
	}
	*w = bitmap->Bounds().Width();
	*h = bitmap->Bounds().Height();
}