// -*- Mode: C++; indent-tabs-mode: nil; tab-width: 2 -*-
/*
 * Copyright (C) 2010 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authored by: Jay Taoko <jay.taoko@canonical.com>
 * Authored by: Mirco Müller <mirco.mueller@canonical.com
 */

#ifndef TOOLTIP_H
#define TOOLTIP_H


#include "Nux/Nux.h"
#include "Nux/BaseWindow.h"
#include "NuxGraphics/GraphicsEngine.h"
#include "Nux/TextureArea.h"
#include "NuxImage/CairoGraphics.h"
#include "StaticCairoText.h"

#include <pango/pango.h>
#include <pango/pangocairo.h>

#include "Introspectable.h"

#if defined(NUX_OS_LINUX)
#include <X11/Xlib.h>
#endif

#define ANCHOR_WIDTH         10.0f
#define ANCHOR_HEIGHT        18.0f
#define HIGH_LIGHT_Y         -30.0f
#define HIGH_LIGHT_MIN_WIDTH 200.0f 
#define RADIUS               5.0f
#define BLUR_INTENSITY       8
#define LINE_WIDTH           1.0f
#define PADDING_SIZE         1
#define H_MARGIN             30
#define V_MARGIN             4
#define FONT_FACE            "Ubuntu 13"

class QuicklistMenuItem;
  
namespace nux
{
  class VLayout;
  class HLayout;
  class SpaceLayout;

  class Tooltip : public BaseWindow, public Introspectable
  {
    NUX_DECLARE_OBJECT_TYPE (Tooltip, BaseWindow);
  public:
    Tooltip ();

    ~Tooltip ();

    long ProcessEvent (IEvent& iEvent,
      long    traverseInfo,
      long    processEventInfo);

    void Draw (GraphicsEngine& gfxContext,
      bool             forceDraw);

    void DrawContent (GraphicsEngine& gfxContext,
      bool             forceDraw);

    void SetText (NString text);

    void ShowTooltipWithTipAt (int anchor_tip_x, int anchor_tip_y);
    
    // Introspection
    const gchar* GetName ();
    void AddProperties (GVariantBuilder *builder);
  
  private:
    void RecvCairoTextChanged (StaticCairoText* cairo_text);

    void PreLayoutManagement ();

    long PostLayoutManagement (long layoutResult);

    void PositionChildLayout (float offsetX,
      float offsetY);

    void LayoutWindowElements ();

    void NotifyConfigurationChange (int width,
      int height);

    //nux::CairoGraphics*   _cairo_graphics;
    int                   _anchorX;
    int                   _anchorY;
    nux::NString          _labelText;
    int                   _dpiX;
    int                   _dpiY;
    int                   _top_size; // size of the segment from point 13 to 14. See figure in _compute_full_mask_path.

    cairo_font_options_t* _fontOpts;

    nux::StaticCairoText* _tooltip_text;
    nux::BaseTexture*     _texture_bg;
    nux::BaseTexture*     _texture_mask;
    nux::BaseTexture*     _texture_outline;

    float _anchor_width;
    float _anchor_height;
    float _corner_radius;
    float _padding;
    nux::HLayout *_hlayout;
    VLayout *_vlayout;
    nux::SpaceLayout *_left_space;  //!< Space from the left of the widget to the left of the text.
    nux::SpaceLayout *_right_space; //!< Space from the right of the text to the right of the widget.
    nux::SpaceLayout *_top_space;  //!< Space from the left of the widget to the left of the text.
    nux::SpaceLayout *_bottom_space; //!< Space from the right of the text to the right of the widget.

    bool _cairo_text_has_changed;
    void UpdateTexture ();
    
    // Introspection
    gchar *_name;
  };
}

#endif // TOOLTIP_H