/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  RawTherapee 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 RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "lwbutton.h"
#include "guiutils.h"

LWButton::LWButton (Cairo::RefPtr<Cairo::ImageSurface> i, int aCode, void* aData, Alignment ha, Alignment va, Glib::ustring tooltip) 
    : halign(ha), valign(va), icon(i), state(Normal), listener(NULL), actionCode(aCode), actionData(aData), toolTip(tooltip) {
    
    if (i)  {
			w = i->get_width () + 2;
			h = i->get_height () + 2;
    }
    else
			w = h = 2;
}

void LWButton::getSize (int& minw, int& minh) {

    minw = w;
    minh = h;
}

void LWButton::setPosition (int x, int y) {

    xpos = x;
    ypos = y;
}

void LWButton::getPosition (int& x, int& y) {

    x = xpos;
    y = ypos;
}

void LWButton::setIcon (Cairo::RefPtr<Cairo::ImageSurface> i) {

    icon = i;
    if (i)  {
			w = i->get_width () + 2;
			h = i->get_height () + 2;
    }
    else
			w = h = 2;
}

Cairo::RefPtr<Cairo::ImageSurface> LWButton::getIcon () {

    return icon;
}

void LWButton::setColors (const Gdk::Color& bg, const Gdk::Color& fg) {

    bgr = bg.get_red_p ();
    bgg = bg.get_green_p ();
    bgb = bg.get_blue_p ();
    fgr = fg.get_red_p ();
    fgg = fg.get_green_p ();
    fgb = fg.get_blue_p ();
}

bool LWButton::inside (int x, int y) {

    return x>xpos && x<xpos+w && y>ypos && y<ypos+h;
}

bool LWButton::motionNotify  (int x, int y) {

    bool in = inside (x, y);
    State nstate = state;
    if (state==Normal && in)
        nstate = Over;
    else if (state==Over && !in)
        nstate = Normal;
    else if (state==Pressed_In && !in)
        nstate = Pressed_Out;
    else if (state==Pressed_Out && in)
        nstate = Pressed_In;
    
    if (state!=nstate) {
        state = nstate;
        if (listener)
            listener->redrawNeeded (this);
        return true;
    }
    return in;
}

bool LWButton::pressNotify   (int x, int y) {

    bool in = inside (x, y);
    State nstate = state;
    if (in && (state==Normal || state==Over || state==Pressed_Out))
        nstate = Pressed_In;
    else if (!in && state==Pressed_In)
        nstate = Normal;
        
    if (state!=nstate) {
        state = nstate;
        if (listener)
            listener->redrawNeeded (this);
        return true;
    }
    return in;
}

bool LWButton::releaseNotify (int x, int y) {

    bool in = inside (x, y);
    State nstate = state;
    bool action = false;
    if (in && (state==Pressed_In || state==Pressed_Out)) {
        nstate = Over;
        action = true;
    }
    else 
        nstate = Normal;
        
    bool ret = action;
    if (state!=nstate) {
        state = nstate;
        if (listener)
            listener->redrawNeeded (this);
        ret = true;
    }
    
    if (action && listener)
        listener->buttonPressed (this, actionCode, actionData);
    return ret;
}

void LWButton::redraw (Cairo::RefPtr<Cairo::Context> context) {

    GThreadLock lock; // All GUI acces from idle_add callbacks or separate thread HAVE to be protected
    context->set_line_width (1.0);
    context->set_antialias (Cairo::ANTIALIAS_SUBPIXEL);
    context->rectangle (xpos+0.5, ypos+0.5, w-1.0, h-1.0);
    if (state==Pressed_In)
        context->set_source_rgb (fgr, fgg, fgb);
    else
        context->set_source_rgba (bgr, bgg, bgb, 0);
    context->fill_preserve ();
    if (state==Over) 
        context->set_source_rgb (fgr, fgg, fgb);
    else
        context->set_source_rgba (bgr, bgg, bgb, 0);
    context->stroke ();
    int dilat = 1;
    if (state==Pressed_In)
        dilat++;

    if (icon) {
        context->set_source (icon, xpos+dilat, ypos+dilat);
        context->paint ();
    }
}

void LWButton::getAlignment (Alignment& ha, Alignment& va) {

    ha = halign;
    va = valign;
}

Glib::ustring LWButton::getToolTip (int x, int y) {

    if (inside (x, y))
        return toolTip;
    else
        return "";
}

void LWButton::setToolTip (const Glib::ustring& tooltip) {

    toolTip = tooltip;
}

