Diffstat (limited to 'noncore/graphics/drawpad/erasetool.cpp') (more/less context) (ignore whitespace changes)
-rw-r--r-- | noncore/graphics/drawpad/erasetool.cpp | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/noncore/graphics/drawpad/erasetool.cpp b/noncore/graphics/drawpad/erasetool.cpp new file mode 100644 index 0000000..d37c901 --- a/dev/null +++ b/noncore/graphics/drawpad/erasetool.cpp @@ -0,0 +1,74 @@ +/*************************************************************************** + * * + * DrawPad - a drawing program for Opie Environment * + * * + * (C) 2002 by S. Prud'homme <prudhomme@laposte.net> * + * * + * 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. * + * * + ***************************************************************************/ + +#include "erasetool.h" + +#include "drawpad.h" +#include "drawpadcanvas.h" + +#include <qpainter.h> +#include <qpixmap.h> + +EraseTool::EraseTool(DrawPad* drawPad, DrawPadCanvas* drawPadCanvas) + : Tool(drawPad, drawPadCanvas) +{ + m_mousePressed = false; + m_polyline.resize(3); +} + +EraseTool::~EraseTool() +{ +} + +void EraseTool::mousePressEvent(QMouseEvent* e) +{ + m_mousePressed = true; + m_polyline[2] = m_polyline[1] = m_polyline[0] = e->pos(); +} + +void EraseTool::mouseReleaseEvent(QMouseEvent* e) +{ + Q_UNUSED(e) + + m_mousePressed = false; +} + +void EraseTool::mouseMoveEvent(QMouseEvent* e) +{ + if (m_mousePressed) { + QPainter painter; + QPen pen(Qt::white, m_pDrawPad->pen().width()); + painter.begin(m_pDrawPadCanvas->currentPage()); + painter.setPen(pen); + m_polyline[2] = m_polyline[1]; + m_polyline[1] = m_polyline[0]; + m_polyline[0] = e->pos(); + painter.drawPolyline(m_polyline); + painter.end(); + + QRect r = m_polyline.boundingRect(); + r = r.normalize(); + r.setLeft(r.left() - m_pDrawPad->pen().width()); + r.setTop(r.top() - m_pDrawPad->pen().width()); + r.setRight(r.right() + m_pDrawPad->pen().width()); + r.setBottom(r.bottom() + m_pDrawPad->pen().width()); + + QRect viewportRect(m_pDrawPadCanvas->contentsToViewport(r.topLeft()), + m_pDrawPadCanvas->contentsToViewport(r.bottomRight())); + + bitBlt(m_pDrawPadCanvas->viewport(), viewportRect.x(), viewportRect.y(), + m_pDrawPadCanvas->currentPage(), r.x(), r.y(), r.width(), r.height()); + + m_pDrawPadCanvas->viewport()->update(viewportRect); + } +} |