/*************************************************************************** * Copyright (C) 2003 by Martin Koller * * m.koller@surfeu.at * * This file is part of the TDE Control Center Module for Joysticks * * * * This program 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. * * * * 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, write to the * * Free Software Foundation, Inc., * * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * ***************************************************************************/ #include "poswidget.h" #include <tqpainter.h> #define XY_WIDTH 220 #define MARK_WIDTH 10 //----------------------------------------------------------------- PosWidget::PosWidget(TQWidget *parent, const char *name) : TQWidget(parent, name, WRepaintNoErase), x(0), y(0), trace(false) { setMinimumSize(XY_WIDTH, XY_WIDTH); setMaximumSize(XY_WIDTH, XY_WIDTH); setPaletteBackgroundColor(Qt::white); } //----------------------------------------------------------------- void PosWidget::paintEvent(TQPaintEvent *) { TQPainter paint(this); paint.drawRect(0, 0, width(), height()); paint.setPen(Qt::gray); // draw a center grid paint.drawLine(XY_WIDTH/2, 1, XY_WIDTH/2, XY_WIDTH - 2); paint.drawLine(1, XY_WIDTH/2, XY_WIDTH - 2, XY_WIDTH/2); // draw the current position marker paint.setPen(Qt::blue); paint.drawLine(x - MARK_WIDTH/2, y - MARK_WIDTH/2, x + MARK_WIDTH/2, y + MARK_WIDTH/2); paint.drawLine(x - MARK_WIDTH/2, y + MARK_WIDTH/2, x + MARK_WIDTH/2, y - MARK_WIDTH/2); } //----------------------------------------------------------------- void PosWidget::changeX(int newX) { // transform coordinates from joystick to widget coordinates newX = int((newX/65535.0)*XY_WIDTH + XY_WIDTH/2); if ( x == newX ) return; // avoid unnecessary redraw eraseOld(); x = newX; } //----------------------------------------------------------------- void PosWidget::changeY(int newY) { // transform coordinates from joystick to widget coordinates newY = int((newY/65535.0)*XY_WIDTH + XY_WIDTH/2); if ( y == newY ) return; // avoid unnecessary redraw eraseOld(); y = newY; } //----------------------------------------------------------------- void PosWidget::showTrace(bool t) { trace = t; if ( !trace ) { erase(); update(); } } //----------------------------------------------------------------- void PosWidget::eraseOld() { TQPainter paint(this); //paint.eraseRect(x - MARK_WIDTH/2, y - MARK_WIDTH/2, MARK_WIDTH + 1, MARK_WIDTH + 1); // erase previous cross (don't use eraseRect() so that trace flags will be not destroyed so much) paint.setPen(Qt::white); paint.drawLine(x - MARK_WIDTH/2, y - MARK_WIDTH/2, x + MARK_WIDTH/2, y + MARK_WIDTH/2); paint.drawLine(x - MARK_WIDTH/2, y + MARK_WIDTH/2, x + MARK_WIDTH/2, y - MARK_WIDTH/2); if ( trace ) // show previous position with a smaller black cross { paint.setPen(Qt::black); paint.drawLine(x - 2, y - 2, x + 2, y + 2); paint.drawLine(x - 2, y + 2, x + 2, y - 2); } update(); } //----------------------------------------------------------------- #include "poswidget.moc"