/*  Starshatter OpenSource Distribution
    Copyright (c) 1997-2004, Destroyer Studios LLC.
    All Rights Reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name "Destroyer Studios" nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.

    SUBSYSTEM:    nGenEx.lib
    FILE:         ComboBox.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Drop-down list of Buttons class
*/

#include "MemDebug.h"
#include "ComboBox.h"
#include "ComboList.h"
#include "Button.h"
#include "Video.h"
#include "Screen.h"
#include "Bitmap.h"
#include "Font.h"
#include "EventDispatch.h"

// +--------------------------------------------------------------------+
// DECLARE MAPPING FUNCTIONS:
DEF_MAP_CLIENT(ComboBox, OnListSelect);
DEF_MAP_CLIENT(ComboBox, OnListExit);

// +--------------------------------------------------------------------+

ComboBox::ComboBox(ActiveWindow* p, int ax, int ay, int aw, int ah, DWORD aid)
    : ActiveWindow(p->GetScreen(), ax, ay, aw, ah, aid, 0, p)
{
    button_state   = 0;
    captured       = 0;
    pre_state      = 0;
    seln           = 0;
    list           = 0;
    list_showing   = false;
    border         = true;
    animated       = true;
    bevel_width    = 5;

    char buf[32];
    sprintf_s(buf, "ComboBox %d", id); //-V576
    desc = buf;
}

ComboBox::ComboBox(Screen* s, int ax, int ay, int aw, int ah, DWORD aid)
    : ActiveWindow(s, ax, ay, aw, ah, aid)
{
    button_state   = 0;
    captured       = 0;
    pre_state      = 0;
    seln           = 0;
    list           = 0;
    list_showing   = false;
    border         = true;
    animated       = true;
    bevel_width    = 5;

    char buf[32];
    sprintf_s(buf, "ComboBox %d", id); //-V576
    desc = buf;
}

// +--------------------------------------------------------------------+

ComboBox::~ComboBox()
{
    items.destroy();

    if (list && !list_showing)
    delete list;
}

// +--------------------------------------------------------------------+

void ComboBox::SetBevelWidth(short nNewValue)
{
    if (nNewValue < 0) nNewValue = 0;
    bevel_width = nNewValue;
}

void  ComboBox::SetBorder(bool bNewValue)
{
    border = bNewValue;
}

void  ComboBox::SetBorderColor(Color newValue)
{
    border_color = newValue;
}

void  ComboBox::SetActiveColor(Color newValue)
{
    active_color = newValue;
}

void  ComboBox::SetAnimated(bool bNewValue)
{
    animated = bNewValue;
}

// +--------------------------------------------------------------------+

void
ComboBox::Draw()
{
    int x = 0;
    int y = 0;
    int w = rect.w;
    int h = rect.h;

    if (w < 1 || h < 1 || !shown)
    return;

    Rect btn_rect(x,y,w,h);

    // draw the bevel:
    DrawRectSimple(btn_rect, button_state);

    // draw the border:
    if (border)
    DrawRect(0,0,w-1,h-1,border_color);

    // draw the arrow:
    POINT arrow[3];
    double h3 = (double)h/3.0;

    arrow[0].x = (int) (w-2*h3);
    arrow[0].y = (int) (h3);
    arrow[1].x = (int) (w-h3);
    arrow[1].y = (int) (h3);
    arrow[2].x = (int) ((arrow[1].x + arrow[0].x)/2);
    arrow[2].y = (int) (2*h3);

    FillPoly(3, arrow, border_color);

    // draw text here:
    Text caption = text;
    if (GetSelectedIndex() >= 0)
    caption = GetSelectedItem();

    if (font && caption.length()) {
        int border_size = 4;

        if (style & WIN_RAISED_FRAME && style & WIN_SUNK_FRAME)
        border_size = 8;

        Rect label_rect = CalcLabelRect();
        int  vert_space = label_rect.h;
        int  horz_space = label_rect.w;

        DrawText(caption.data(), 0, label_rect, DT_CALCRECT | DT_WORDBREAK | text_align);
        vert_space = (vert_space - label_rect.h)/2;
        
        label_rect.w = horz_space;

        if (vert_space > 0)
        label_rect.y += vert_space;

        if (animated && button_state > 0) {
            label_rect.x += button_state;
            label_rect.y += button_state;
        }

        font->SetColor(fore_color);
        DrawText(caption.data(), 0, label_rect, DT_WORDBREAK | text_align);
    }
}

Rect ComboBox::CalcLabelRect()
{
    // fit the text in the bevel:
    Rect label_rect;
    label_rect.x = 0;
    label_rect.y = 0;
    label_rect.w = rect.w;
    label_rect.h = rect.h;

    label_rect.Deflate(bevel_width, bevel_width);

    return label_rect;
}

// +--------------------------------------------------------------------+

void
ComboBox::DrawRectSimple(Rect& rect, int state)
{
    if (state && active_color != Color::Black)
    FillRect(rect, active_color);
    else
    FillRect(rect, back_color);
}

// +--------------------------------------------------------------------+

int ComboBox::OnMouseMove(int x, int y)
{
    bool dirty = false;

    if (captured)
    {
        ActiveWindow* test = GetCapture();

        if (test != this)
        {
            captured = false;
            button_state = 0;
            dirty = true;
        }

        else
        {
            if (button_state == 1)
            {
                if (!rect.Contains(x,y))
                {
                    button_state = 0;
                    dirty = true;
                }
            }
            else
            {
                if (rect.Contains(x,y))
                {
                    button_state = 1;
                    dirty = true;
                }
            }
        }
    }

    return ActiveWindow::OnMouseMove(x,y);
}

int ComboBox::OnLButtonDown(int x, int y)
{
    if (!captured)
    captured = SetCapture();

    button_state = 1;

    return ActiveWindow::OnLButtonDown(x,y);
}

int ComboBox::OnLButtonUp(int x, int y)
{
    if (captured) {
        ReleaseCapture();
        captured = 0;
    }

    button_state = -1;
    ShowList();
    Button::PlaySound(Button::SND_COMBO_OPEN);
    return ActiveWindow::OnLButtonUp(x,y);
}

int ComboBox::OnClick()
{
    return ActiveWindow::OnClick();
}

int ComboBox::OnMouseEnter(int mx, int my)
{ 
    if (button_state == 0)
    button_state = -1;

    return ActiveWindow::OnMouseEnter(mx, my);
}

int ComboBox::OnMouseExit(int mx, int my)
{
    if (button_state == -1)
    button_state = 0;

    return ActiveWindow::OnMouseExit(mx, my);
}

// +--------------------------------------------------------------------+

void ComboBox::MoveTo(const Rect& r)
{
    ActiveWindow::MoveTo(r);

    if (list) {
        delete list;
        list = 0;
    }
}

void ComboBox::ShowList()
{
    if (!list) {
        list = new(__FILE__,__LINE__) ComboList(this, screen, 
        rect.x, rect.y,
        rect.w, rect.h,
        items.size());

    }

    if (list) {
        list->SetTextAlign(text_align);
        list->SetFont(font);
        list->SetText(text);
        list->SetSelection(seln);
        list->SetItems(items);

        list->Show();
        list_showing = true;

        EventDispatch* dispatch = EventDispatch::GetInstance();
        if (dispatch) {
            dispatch->MouseEnter(list);
            dispatch->SetFocus(list);
        }

        REGISTER_CLIENT(EID_CLICK,      list, ComboBox, OnListSelect);
        REGISTER_CLIENT(EID_MOUSE_EXIT, list, ComboBox, OnListExit);
    }
}

void ComboBox::HideList()
{
    if (list) {
        // These will be handled by the list window itself (i hope)
        UNREGISTER_CLIENT(EID_CLICK,      list, ComboBox);
        UNREGISTER_CLIENT(EID_MOUSE_EXIT, list, ComboBox);

        list->Hide();
        list_showing = false;
    }
}

// +--------------------------------------------------------------------+

void ComboBox::OnListSelect(AWEvent* event)
{
    if (list) {
        int new_seln = list->GetSelectedIndex();
        
        if (new_seln >= 0 && new_seln < items.size())
        seln = new_seln;

        HideList();
        OnSelect();
        Button::PlaySound(Button::SND_COMBO_SELECT);
    }
}

void ComboBox::OnListExit(AWEvent* event)
{
    //HideList();
    //Button::PlaySound(Button::SND_COMBO_CLOSE);
}

// +--------------------------------------------------------------------+

int ComboBox::NumItems()
{
    return items.size();
}

void ComboBox::ClearItems()
{
    items.destroy();
    seln = 0;
}

void ComboBox::AddItem(const char* item)
{
    Text* t = new(__FILE__,__LINE__) Text(item);

    if (t) items.append(t);
}

const char*  ComboBox::GetItem(int index)
{
    if (index >= 0 && index < items.size())
    return items[index]->data();
    else
    return 0;
}

void ComboBox::SetItem(int index, const char* item)
{
    if (index >= 0 && index < items.size()) {
        *items[index] = item;
    }

    else {
        Text* t = new(__FILE__,__LINE__) Text(item);
        if (t)
        items.append(t);
    }
}

void ComboBox::SetLabel(const char* label)
{
    SetText(label);
}

int  ComboBox::GetCount()
{
    return items.size();
}

const char*  ComboBox::GetSelectedItem()
{
    if (seln >= 0 && seln < items.size())
    return items[seln]->data();
    else
    return 0;
}

int  ComboBox::GetSelectedIndex()
{
    if (seln >= 0 && seln < items.size())
    return seln;
    else
    return -1;
}

void ComboBox::SetSelection(int index)
{
    if (seln != index && index >= 0 && index < items.size()) {
        seln = index;
    }
}