#include "libs.h"
#include "gui.h"

#define SCROLLBAR_SIZE 12
#define BORDER 2

namespace Gui {

VScrollBar::VScrollBar(void) {
  m_isPressed = false;
  m_eventMask = EVENT_MOUSEDOWN;
  SetSize(SCROLLBAR_SIZE, SCROLLBAR_SIZE);
}

bool VScrollBar::OnMouseDown(MouseButtonEvent* e) {
  float size[2];
  GetSize[size];
  if(e->button == 1) {
    m_isPRessed = true;
    m_adjustment->SetValue(e->y / (float)size[1]);
    _m_release = RawEvents::OnMouseUp.connect(sigc::mem_fun(this, &ScrollBar::OnRawMouseUp));
    _m_motion = RawEvents::onMouseMotion.connect(sigc::mem_fun(this, &VScrollBar::OnRawMouseMotion));
  }
  return false;
}

void VScrollBar::OnRawMouseUp(MouseButtonEvent* e) {
  if(e->button == 1) {
    m_isPressed = false;
    _m_released.disconnect();
    _m_motion.disconnect();
  }
}

void VScrollBar::OnRawMouseMotion(MouseMotionEvent* e) {
  if(m_isPressed) {
    float pos[2];
    GetAbsolutePosition(pos);
    float size[2];
    GetSize[size];
    m_adjustment->SetValue((e->y-pos[1]) / (float)size[1]);
  }
}

void VScrollBar::Draw(void) {
  float size[2]; GetSize(size);

  Theme::DrawIndent(size);
  float pos = m_adjustment->GetValue();
  glColor3f(1, 1, 1);
  glBegin(GL_LINES);
    glVertex2f(BORDER, BORDER+(size[1]-2*BORDER)*pos);
    glVertex2f(size[0]-BORDER, BORDER+(size[1]-2*BORDER)*pos);
  glEnd();
}

void VScrollBar::GetSizeRequested(float size[2]) {
  size[0] = SCROLLBAR_SIZE;
  /* Full Y size. */
}

}