IGUITextOwner.cpp

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/* Copyright (C) 2013 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
IGUITextOwner
*/

#include "precompiled.h"
#include "GUI.h"


//-------------------------------------------------------------------
//  Constructor / Destructor
//-------------------------------------------------------------------
IGUITextOwner::IGUITextOwner() : m_GeneratedTextsValid(false)
{
}

IGUITextOwner::~IGUITextOwner()
{
    // Delete all generated texts.
    std::vector<SGUIText*>::iterator it;
    for (it=m_GeneratedTexts.begin(); it!=m_GeneratedTexts.end(); ++it)
    {
        delete *it;
    }
}

void IGUITextOwner::AddText(SGUIText * text)
{
    m_GeneratedTexts.push_back(text);
}

void IGUITextOwner::HandleMessage(SGUIMessage &Message)
{
    switch (Message.type)
    {
    case GUIM_SETTINGS_UPDATED:
        // Everything that can change the visual appearance.
        //  it is assumed that the text of the object will be dependent on
        //  these. Although that is not certain, but one will have to manually
        //  change it and disregard this function.
        // TODO Gee: (2004-09-07) Make sure this is all options that can affect the text.
        if (Message.value == "size" || Message.value == "z" ||
            Message.value == "absolute" || Message.value == "caption" ||
            Message.value == "font" || Message.value == "textcolor" ||
            Message.value == "buffer_zone")
        {
            m_GeneratedTextsValid = false;
        }
        break;

    default:
        break;
    }
}

void IGUITextOwner::UpdateCachedSize()
{
    // If an ancestor's size changed, this will let us intercept the change and
    // update our text positions

    IGUIObject::UpdateCachedSize();
    m_GeneratedTextsValid = false;
}

void IGUITextOwner::DrawText(int index, const CColor& color, const CPos& pos, float z, const CRect& clipping)
{
    if (!m_GeneratedTextsValid)
    {
        SetupText();
        m_GeneratedTextsValid = true;
    }

    if (index < 0 || index >= (int)m_GeneratedTexts.size())
    {
        debug_warn(L"Trying to draw a Text Index within a IGUITextOwner that doesn't exist");
        return;
    }

    if (GetGUI())
    {
        GetGUI()->DrawText(*m_GeneratedTexts[index], color, pos, z, clipping);
    }
}

void IGUITextOwner::CalculateTextPosition(CRect &ObjSize, CPos &TextPos, SGUIText &Text)
{
    EVAlign valign;
    GUI<EVAlign>::GetSetting(this, "text_valign", valign);

    // The horizontal Alignment is now computed in GenerateText in order to not have to
    // loop through all of the TextCall objects again.
    TextPos.x = ObjSize.left;

    switch (valign)
    {
    case EVAlign_Top:
        TextPos.y = ObjSize.top;
        break;
    case EVAlign_Center:
        // Round to integer pixel values, else the fonts look awful
        TextPos.y = floorf(ObjSize.CenterPoint().y - Text.m_Size.cy/2.f);
        break;
    case EVAlign_Bottom:
        TextPos.y = ObjSize.bottom - Text.m_Size.cy;
        break;
    default:
        debug_warn(L"Broken EVAlign in CButton::SetupText()");
        break;
    }
}

bool IGUITextOwner::MouseOverIcon()
{
    return false;
}