diff options
Diffstat (limited to 'kcontrol/joystick/poswidget.cpp')
| -rw-r--r-- | kcontrol/joystick/poswidget.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/kcontrol/joystick/poswidget.cpp b/kcontrol/joystick/poswidget.cpp new file mode 100644 index 000000000..54e619d7a --- /dev/null +++ b/kcontrol/joystick/poswidget.cpp @@ -0,0 +1,138 @@ +/*************************************************************************** + * Copyright (C) 2003 by Martin Koller * + * m.koller@surfeu.at * + * This file is part of the KDE 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 <qpainter.h> + +#define XY_WIDTH 220 +#define MARK_WIDTH 10 + +//----------------------------------------------------------------- + +PosWidget::PosWidget(QWidget *parent, const char *name) + : QWidget(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(QPaintEvent *) +{ + QPainter 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() +{ + QPainter 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" |