FieldWindow.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 Source Code 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.

Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../idlib/precompiled.h"
#pragma hdrstop

#include "DeviceContext.h"
#include "Window.h"
#include "UserInterfaceLocal.h"
#include "FieldWindow.h"


void idFieldWindow::CommonInit() {
        cursorPos = 0;
        lastTextLength = 0;
        lastCursorPos = 0;
        paintOffset = 0;
        showCursor = false;
}

idFieldWindow::idFieldWindow(idDeviceContext *d, idUserInterfaceLocal *g) : idWindow(d, g) {
        dc = d;
        gui = g;
        CommonInit();
}

idFieldWindow::idFieldWindow(idUserInterfaceLocal *g) : idWindow(g) {
        gui = g;
        CommonInit();
}

idFieldWindow::~idFieldWindow() {

}

bool idFieldWindow::ParseInternalVar(const char *_name, idParser *src) {
        if (idStr::Icmp(_name, "cursorvar") == 0) {
                ParseString(src, cursorVar);
                return true;
        }
        if (idStr::Icmp(_name, "showcursor") == 0) {
                showCursor = src->ParseBool();
                return true;
        }
        return idWindow::ParseInternalVar(_name, src);
}


void idFieldWindow::CalcPaintOffset(int len) {
        lastCursorPos = cursorPos;
        lastTextLength = len;
        paintOffset = 0;
        int tw = dc->TextWidth(text, textScale, -1);
        if (tw < textRect.w) {
                return;
        }
        while (tw > textRect.w && len > 0) {
                tw = dc->TextWidth(text, textScale, --len);
                paintOffset++;
        }
}


void idFieldWindow::Draw(int time, float x, float y) {
        float scale = textScale;
        int len = text.Length();
        cursorPos = gui->State().GetInt( cursorVar );
        if (len != lastTextLength || cursorPos != lastCursorPos) {
                CalcPaintOffset(len);
        }
        idRectangle rect = textRect;
        if (paintOffset >= len) {
                paintOffset = 0;
        }
        if (cursorPos > len) {
                cursorPos = len;
        }
        dc->DrawText(&text[paintOffset], scale, 0, foreColor, rect, false, ((flags & WIN_FOCUS) || showCursor) ? cursorPos - paintOffset : -1);
}