#include <pugl/pugl.h>
#include "pui.h"

static const int trough1_cut = 15;
static const int trough2_cut = 20;
static const int pad = 20;

float HSlider::GetNewValue(int x, int y)
{
	int x2 = this->x + pad;
	int w2 = this->w - pad - pad;
	if (x <= x2) return min;
	if (x >= x2 + w2) return max;
	return (x - x2) * (max - min) / w2 + min;
}

void HSlider::OnPaint(const PUi *pui) const
{
	float m = (value - min) / (max - min);

//	printf("%d\n", tex[TEX_TROUGH1]);

	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_BLEND);
	glEnable(GL_TEXTURE_2D);

	int t = big ? TEX_TROUGH1 : TEX_TROUGH1;
	int w2 = pui->w[t];
	int h2 = pui->h[t];
	int mx, my;
	mx = (w - w2) * 0.5f + x;
	my = (h - h2) * 0.5f + y;

	int cut = big ? trough2_cut : trough1_cut;
	float fc = (float)cut / h2;

	glBindTexture(GL_TEXTURE_2D, pui->tex[t]);
	glBegin(GL_QUADS);
	glColor3f(1.0, 1.0, 1.0);
	glTexCoord2f(0.0, 0.0);
	glVertex2f(     mx,      y);
	glTexCoord2f(0.0, fc);
	glVertex2f(     mx,      y + cut);
	glTexCoord2f(1.0, fc);
	glVertex2f(w2 + mx,      y + cut);
	glTexCoord2f(1.0, 0.0);
	glVertex2f(w2 + mx,      y);

	glTexCoord2f(0.0, fc);
	glVertex2f(     mx,      y + cut);
	glTexCoord2f(0.0, 1.0 - fc);
	glVertex2f(     mx, h + y - cut);
	glTexCoord2f(1.0, 1.0 - fc);
	glVertex2f(w2 + mx, h + y - cut);
	glTexCoord2f(1.0, fc);
	glVertex2f(w2 + mx,      y + cut);

	glTexCoord2f(0.0, 1.0 - fc);
	glVertex2f(     mx, h + y - cut);
	glTexCoord2f(0.0, 1.0);
	glVertex2f(     mx, h + y);
	glTexCoord2f(1.0, 1.0);
	glVertex2f(w2 + mx, h + y);
	glTexCoord2f(1.0, 1.0 - fc);
	glVertex2f(w2 + mx, h + y - cut);
/*
	glTexCoord2f(0.0, 0.0);
	glVertex2f(     mx,      my);
	glTexCoord2f(0.0, 1.0);
	glVertex2f(     mx, h2 + my);
	glTexCoord2f(1.0, 1.0);
	glVertex2f(w2 + mx, h2 + my);
	glTexCoord2f(1.0, 0.0);
	glVertex2f(w2 + mx,      my);*/
	glEnd();

	if (big) {
		t = active ? TEX_SLIDER2_PRE : TEX_SLIDER2;
	} else {
		t = active ? TEX_SLIDER1_PRE : TEX_SLIDER1;
	}
	w2 = pui->w[t];
	h2 = pui->h[t];

	int x3 = this->x + pad;
	int w3 = this->w - pad - pad;
	mx = w3 * m + x3 - w2 * 0.5f;
	my = (h - h2) * 0.5f + y;

	glBindTexture(GL_TEXTURE_2D, pui->tex[t]);
	glBegin(GL_QUADS);
	if (this->colour.a) glColor4f(colour.r, colour.g, colour.b, colour.a);
	glTexCoord2f(0.0, 0.0);
	glVertex2f(     mx,      my);
	glTexCoord2f(0.0, 1.0);
	glVertex2f(     mx, h2 + my);
	glTexCoord2f(1.0, 1.0);
	glVertex2f(w2 + mx, h2 + my);
	glTexCoord2f(1.0, 0.0);
	glVertex2f(w2 + mx,      my);
	glEnd();

	glDisable(GL_TEXTURE_2D);

/*	glBegin(GL_QUADS);
	glColor4f(0.5f, 0.3f, 0.5f, 0.5f);
	glVertex2f(    x,     y);
	glVertex2f(    x, h + y);
	glVertex2f(w + x, h + y);
	glVertex2f(w + x,     y);
	glEnd();*/
}


float VSlider::GetNewValue(int x, int y)
{
	int y2 = this->y + pad;
	int h2 = this->h - pad - pad;
	if (y <= y2) return max;
	if (y >= y2 + h2) return min;
	return (y2 + h2 - y) * (max - min) / h2 + min;
}

void VSlider::OnPaint(const PUi *pui) const
{
	float m = (value - min) / (max - min);

//	printf("%d\n", tex[TEX_TROUGH1]);

	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	glEnable(GL_BLEND);
	glEnable(GL_TEXTURE_2D);

	int t = big ? TEX_TROUGH1 : TEX_TROUGH1;
	int w2 = pui->w[t];
	int h2 = pui->h[t];
	int mx, my;
	mx = (w - w2) * 0.5f + x;
	my = (h - h2) * 0.5f + y;

	int cut = big ? trough2_cut : trough1_cut;
	float fc = (float)cut / h2;

	glBindTexture(GL_TEXTURE_2D, pui->tex[t]);
	glBegin(GL_QUADS);
	glColor3f(1.0, 1.0, 1.0);

	glTexCoord2f(0.0, 0.0);
	glVertex2f(     mx,      y);
	glTexCoord2f(0.0, fc);
	glVertex2f(     mx,      y + cut);
	glTexCoord2f(1.0, fc);
	glVertex2f(w2 + mx,      y + cut);
	glTexCoord2f(1.0, 0.0);
	glVertex2f(w2 + mx,      y);

	glTexCoord2f(0.0, fc);
	glVertex2f(     mx,      y + cut);
	glTexCoord2f(0.0, 1.0 - fc);
	glVertex2f(     mx, h + y - cut);
	glTexCoord2f(1.0, 1.0 - fc);
	glVertex2f(w2 + mx, h + y - cut);
	glTexCoord2f(1.0, fc);
	glVertex2f(w2 + mx,      y + cut);

	glTexCoord2f(0.0, 1.0 - fc);
	glVertex2f(     mx, h + y - cut);
	glTexCoord2f(0.0, 1.0);
	glVertex2f(     mx, h + y);
	glTexCoord2f(1.0, 1.0);
	glVertex2f(w2 + mx, h + y);
	glTexCoord2f(1.0, 1.0 - fc);
	glVertex2f(w2 + mx, h + y - cut);
/*
	glTexCoord2f(0.0, 0.0);
	glVertex2f(     mx,      my);
	glTexCoord2f(0.0, 1.0);
	glVertex2f(     mx, h2 + my);
	glTexCoord2f(1.0, 1.0);
	glVertex2f(w2 + mx, h2 + my);
	glTexCoord2f(1.0, 0.0);
	glVertex2f(w2 + mx,      my);*/
	glEnd();

	if (big) {
		t = active ? TEX_SLIDER2_PRE : TEX_SLIDER2;
	} else {
		t = active ? TEX_SLIDER1_PRE : TEX_SLIDER1;
	}
	w2 = pui->w[t];
	h2 = pui->h[t];
	int y3 = this->y + pad;
	int h3 = this->h - pad - pad;
	mx = (w - w2) * 0.5f + x;
	my = h3 - h3 * m + y3 - h2 * 0.5f;

	glBindTexture(GL_TEXTURE_2D, pui->tex[t]);
	glBegin(GL_QUADS);
	if (this->colour.a) glColor4f(colour.r, colour.g, colour.b, colour.a);
	glTexCoord2f(0.0, 0.0);
	glVertex2f(     mx,      my);
	glTexCoord2f(0.0, 1.0);
	glVertex2f(     mx, h2 + my);
	glTexCoord2f(1.0, 1.0);
	glVertex2f(w2 + mx, h2 + my);
	glTexCoord2f(1.0, 0.0);
	glVertex2f(w2 + mx,      my);
	glEnd();

	glDisable(GL_TEXTURE_2D);

	if (this->active) {
	glBegin(GL_LINE_LOOP);
	glColor4f(1.f, 1.f, 1.0f, 0.25f);
	glVertex2f(    x + .5f,     y + .5f);
	glVertex2f(    x + .5f, h + y - .5f);
	glVertex2f(w + x - .5f, h + y - .5f);
	glVertex2f(w + x - .5f,     y + .5f);
	glEnd();
	}
}