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/*
* kis_tool_line.cc - part of Krayon
*
* Copyright (c) 2000 John Califf
* Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
* Copyright (c) 2003 Boudewijn Rempt <boud@valdyas.org>
*
* 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 <tqpainter.h>
#include <tqlayout.h>
#include <tqwidget.h>
#include <kdebug.h>
#include <tdeaction.h>
#include <kcommand.h>
#include <tdelocale.h>
#include "kis_cursor.h"
#include "kis_painter.h"
#include "kis_tool_line.h"
#include "kis_button_press_event.h"
#include "kis_button_release_event.h"
#include "kis_move_event.h"
#include "kis_paintop_registry.h"
#include "kis_canvas_subject.h"
#include "kis_undo_adapter.h"
#include "kis_canvas.h"
#include "kis_canvas_painter.h"
#include "kis_cursor.h"
#include "kis_layer.h"
KisToolLine::KisToolLine()
: super(i18n("Line")),
m_dragging( false )
{
setName("tool_line");
setCursor(KisCursor::load("tool_line_cursor.png", 6, 6));
m_painter = 0;
m_currentImage = 0;
m_startPos = KisPoint(0, 0);
m_endPos = KisPoint(0, 0);
}
KisToolLine::~KisToolLine()
{
}
void KisToolLine::update(KisCanvasSubject *subject)
{
m_subject = subject;
m_currentImage = subject->currentImg();
super::update(m_subject);
}
void KisToolLine::paint(KisCanvasPainter& gc)
{
if (m_dragging)
paintLine(gc, TQRect());
}
void KisToolLine::paint(KisCanvasPainter& gc, const TQRect& rc)
{
if (m_dragging)
paintLine(gc, rc);
}
void KisToolLine::buttonPress(KisButtonPressEvent *e)
{
if (!m_subject || !m_currentImage) return;
if (!m_subject->currentBrush()) return;
if (e->button() == Qt::LeftButton) {
m_dragging = true;
//KisCanvasController *controller = m_subject->canvasController();
m_startPos = e->pos(); //controller->windowToView(e->pos());
m_endPos = e->pos(); //controller->windowToView(e->pos());
}
}
void KisToolLine::move(KisMoveEvent *e)
{
if (m_dragging) {
if (m_startPos != m_endPos)
paintLine();
//KisCanvasController *controller = m_subject->canvasController();
if (e->state() & TQt::AltButton) {
KisPoint trans = e->pos() - m_endPos;
m_startPos += trans;
m_endPos += trans;
} else if (e->state() & TQt::ShiftButton)
m_endPos = straightLine(e->pos());
else
m_endPos = e->pos();//controller->windowToView(e->pos());
paintLine();
}
}
void KisToolLine::buttonRelease(KisButtonReleaseEvent *e)
{
if (m_dragging && e->button() == Qt::LeftButton) {
m_dragging = false;
KisCanvasController *controller = m_subject->canvasController();
KisImageSP img = m_subject->currentImg();
if (m_startPos == m_endPos) {
controller->updateCanvas();
m_dragging = false;
return;
}
if ((e->state() & TQt::ShiftButton) == TQt::ShiftButton) {
m_endPos = straightLine(e->pos());
}
else {
m_endPos = e->pos();
}
KisPaintDeviceSP device;
if (m_currentImage &&
(device = m_currentImage->activeDevice()) &&
m_subject &&
m_subject->currentBrush())
{
delete m_painter;
m_painter = new KisPainter( device );
TQ_CHECK_PTR(m_painter);
if (m_currentImage->undo()) m_painter->beginTransaction(i18n("Line"));
m_painter->setPaintColor(m_subject->fgColor());
m_painter->setBrush(m_subject->currentBrush());
m_painter->setOpacity(m_opacity);
m_painter->setCompositeOp(m_compositeOp);
KisPaintOp * op = KisPaintOpRegistry::instance()->paintOp(m_subject->currentPaintop(), m_subject->currentPaintopSettings(), m_painter);
m_painter->setPaintOp(op); // Painter takes ownership
m_painter->paintLine(m_startPos, PRESSURE_DEFAULT, 0, 0, m_endPos, PRESSURE_DEFAULT, 0, 0);
device->setDirty( m_painter->dirtyRect() );
notifyModified();
/* remove remains of the line drawn while moving */
if (controller->kiscanvas()) {
controller->kiscanvas()->update();
}
if (m_currentImage->undo() && m_painter) {
m_currentImage->undoAdapter()->addCommand(m_painter->endTransaction());
}
delete m_painter;
m_painter = 0;
} else {
if (m_painter)
controller->updateCanvas(m_painter->dirtyRect()); // Removes the last remaining line.
}
}
}
KisPoint KisToolLine::straightLine(KisPoint point)
{
KisPoint comparison = point - m_startPos;
KisPoint result;
if ( fabs(comparison.x()) > fabs(comparison.y())) {
result.setX(point.x());
result.setY(m_startPos.y());
} else {
result.setX( m_startPos.x() );
result.setY( point.y() );
}
return result;
}
void KisToolLine::paintLine()
{
if (m_subject) {
KisCanvasController *controller = m_subject->canvasController();
KisCanvas *canvas = controller->kiscanvas();
KisCanvasPainter gc(canvas);
TQRect rc;
paintLine(gc, rc);
}
}
void KisToolLine::paintLine(KisCanvasPainter& gc, const TQRect&)
{
if (m_subject) {
KisCanvasController *controller = m_subject->canvasController();
RasterOp op = gc.rasterOp();
TQPen old = gc.pen();
TQPen pen(TQt::SolidLine);
KisPoint start;
KisPoint end;
// Q_ASSERT(controller);
start = controller->windowToView(m_startPos);
end = controller->windowToView(m_endPos);
// start.setX(start.x() - controller->horzValue());
// start.setY(start.y() - controller->vertValue());
// end.setX(end.x() - controller->horzValue());
// end.setY(end.y() - controller->vertValue());
// end.setX((end.x() - start.x()));
// end.setY((end.y() - start.y()));
// start *= m_subject->zoomFactor();
// end *= m_subject->zoomFactor();
gc.setRasterOp(TQt::NotROP);
gc.setPen(pen);
gc.drawLine(start.floorTQPoint(), end.floorTQPoint());
gc.setRasterOp(op);
gc.setPen(old);
}
}
void KisToolLine::setup(TDEActionCollection *collection)
{
m_action = static_cast<TDERadioAction *>(collection->action(name()));
if (m_action == 0) {
m_action = new TDERadioAction(i18n("&Line"),
"tool_line", TQt::Key_L, this,
TQT_SLOT(activate()), collection,
name());
m_action->setToolTip(i18n("Draw a line"));
m_action->setExclusiveGroup("tools");
m_ownAction = true;
}
}
TQString KisToolLine::quickHelp() const {
return i18n("Alt+Drag will move the origin of the currently displayed line around, Shift+Drag will force you to draw straight lines");
}
#include "kis_tool_line.moc"
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