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koffice/chalk/plugins/tools/selectiontools/kis_tool_select_elliptical.cc

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/*
* kis_tool_select_elliptical.cc -- part of Chalk
*
* Copyright (c) 2004 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 <tqapplication.h>
#include <tqpainter.h>
#include <tqpen.h>
#include <tqlayout.h>
#include <kdebug.h>
#include <kaction.h>
#include <kcommand.h>
#include <klocale.h>
#include "kis_autobrush_resource.h"
#include "kis_canvas_controller.h"
#include "kis_canvas_subject.h"
#include "kis_cursor.h"
#include "kis_image.h"
#include "kis_painter.h"
#include "kis_tool_select_elliptical.h"
#include "kis_layer.h"
#include "kis_undo_adapter.h"
#include "kis_button_press_event.h"
#include "kis_button_release_event.h"
#include "kis_move_event.h"
#include "kis_selection.h"
#include "kis_selection_options.h"
#include "kis_selected_transaction.h"
#include "kis_canvas.h"
#include "kis_canvas_painter.h"
KisToolSelectElliptical::KisToolSelectElliptical()
: super(i18n("Elliptical Select"))
{
setName("tool_select_elliptical");
setCursor(KisCursor::load("tool_elliptical_selection_cursor.png", 6, 6));
m_subject = 0;
m_selecting = false;
m_centerPos = KisPoint(0, 0);
m_startPos = KisPoint(0, 0);
m_endPos = KisPoint(0, 0);
m_optWidget = 0;
m_selectAction = SELECTION_ADD;
}
KisToolSelectElliptical::~KisToolSelectElliptical()
{
}
void KisToolSelectElliptical::activate()
{
super::activate();
if (!m_optWidget)
return;
m_optWidget->slotActivated();
}
void KisToolSelectElliptical::update(KisCanvasSubject *subject)
{
m_subject = subject;
super::update(m_subject);
}
void KisToolSelectElliptical::paint(KisCanvasPainter& gc)
{
if (m_selecting)
paintOutline(gc, TQRect());
}
void KisToolSelectElliptical::paint(KisCanvasPainter& gc, const TQRect& rc)
{
if (m_selecting)
paintOutline(gc, rc);
}
void KisToolSelectElliptical::clearSelection()
{
if (m_subject) {
KisCanvasController *controller = m_subject->canvasController();
KisImageSP img = m_subject->currentImg();
Q_ASSERT(controller);
// if (img && img->floatingSelection().data() != 0) {
// img->unsetFloatingSelection();
// controller->canvas()->update();
// }
m_startPos = KisPoint(0, 0);
m_endPos = KisPoint(0, 0);
m_selecting = false;
}
}
void KisToolSelectElliptical::buttonPress(KisButtonPressEvent *e)
{
if (m_subject) {
KisImageSP img = m_subject->currentImg();
if (img && img->activeDevice() && e->button() == Qt::LeftButton) {
clearSelection();
m_startPos = m_endPos = m_centerPos = e->pos();
m_selecting = true;
paintOutline();
}
}
}
void KisToolSelectElliptical::move(KisMoveEvent *e)
{
if (m_subject && m_selecting) {
paintOutline();
// move (alt) or resize ellipse
if (e->state() & TQt::AltButton) {
KisPoint trans = e->pos() - m_endPos;
m_startPos += trans;
m_endPos += trans;
} else {
KisPoint diag = e->pos() - (e->state() & TQt::ControlButton
? m_centerPos : m_startPos);
// circle?
if (e->state() & TQt::ShiftButton) {
double size = TQMAX(fabs(diag.x()), fabs(diag.y()));
double w = diag.x() < 0 ? -size : size;
double h = diag.y() < 0 ? -size : size;
diag = KisPoint(w, h);
}
// resize around center point?
if (e->state() & TQt::ControlButton) {
m_startPos = m_centerPos - diag;
m_endPos = m_centerPos + diag;
} else {
m_endPos = m_startPos + diag;
}
}
paintOutline();
m_centerPos = KisPoint((m_startPos.x() + m_endPos.x()) / 2,
(m_startPos.y() + m_endPos.y()) / 2);
}
}
void KisToolSelectElliptical::buttonRelease(KisButtonReleaseEvent *e)
{
if (m_subject && m_selecting && e->button() == Qt::LeftButton) {
paintOutline();
if (m_startPos == m_endPos) {
clearSelection();
} else {
TQApplication::setOverrideCursor(KisCursor::waitCursor());
KisImageSP img = m_subject->currentImg();
if (!img)
return;
if (m_endPos.y() < 0)
m_endPos.setY(0);
if (m_endPos.y() > img->height())
m_endPos.setY(img->height());
if (m_endPos.x() < 0)
m_endPos.setX(0);
if (m_endPos.x() > img->width())
m_endPos.setX(img->width());
if (img && img->activeDevice()) {
KisPaintDeviceSP dev = img->activeDevice();
KisSelectedTransaction *t = 0;
if (img->undo()) t = new KisSelectedTransaction(i18n("Elliptical Selection"), dev);
bool hasSelection = dev->hasSelection();
if(! hasSelection)
{
dev->selection()->clear();
if(m_selectAction==SELECTION_SUBTRACT)
dev->selection()->invert();
}
TQRect rc( m_startPos.floorTQPoint(), m_endPos.floorTQPoint());
rc = rc.normalize();
KisSelectionSP tmpSel = new KisSelection(dev);
KisAutobrushCircleShape shape(rc.width(),rc.height(), 1, 1);
TQ_UINT8 value;
for (int y = 0; y <= rc.height(); y++)
for (int x = 0; x <= rc.width(); x++)
{
value = MAX_SELECTED - shape.valueAt(x,y);
tmpSel->setSelected( x+rc.x(), y+rc.y(), value);
}
switch(m_selectAction)
{
case SELECTION_ADD:
dev->addSelection(tmpSel);
break;
case SELECTION_SUBTRACT:
dev->subtractSelection(tmpSel);
break;
}
if(hasSelection) {
dev->setDirty(rc);
dev->emitSelectionChanged(rc);
} else {
dev->setDirty();
dev->emitSelectionChanged();
}
if (img->undo())
img->undoAdapter()->addCommand(t);
TQApplication::restoreOverrideCursor();
}
}
m_selecting = false;
}
}
void KisToolSelectElliptical::paintOutline()
{
if (m_subject) {
KisCanvasController *controller = m_subject->canvasController();
KisCanvas *canvas = controller->kiscanvas();
KisCanvasPainter gc(canvas);
TQRect rc;
paintOutline(gc, rc);
}
}
void KisToolSelectElliptical::paintOutline(KisCanvasPainter& gc, const TQRect&)
{
if (m_subject) {
KisCanvasController *controller = m_subject->canvasController();
RasterOp op = gc.rasterOp();
TQPen old = gc.pen();
TQPen pen(TQt::DotLine);
TQPoint start;
TQPoint end;
Q_ASSERT(controller);
start = controller->windowToView(m_startPos).floorTQPoint();
end = controller->windowToView(m_endPos).floorTQPoint();
gc.setRasterOp(TQt::NotROP);
gc.setPen(pen);
gc.drawEllipse(TQRect(start, end));
gc.setRasterOp(op);
gc.setPen(old);
}
}
void KisToolSelectElliptical::slotSetAction(int action) {
if (action >= SELECTION_ADD && action <= SELECTION_SUBTRACT)
m_selectAction =(enumSelectionMode)action;
}
void KisToolSelectElliptical::setup(KActionCollection *collection)
{
m_action = static_cast<KRadioAction *>(collection->action(name()));
if (m_action == 0) {
m_action = new KRadioAction(i18n("&Elliptical Selection"),
"tool_elliptical_selection" ,
TQt::Key_J,
this,
TQT_SLOT(activate()),
collection,
name());
TQ_CHECK_PTR(m_action);
m_action->setToolTip(i18n("Select an elliptical area"));
m_action->setExclusiveGroup("tools");
m_ownAction = true;
}
}
TQWidget* KisToolSelectElliptical::createOptionWidget(TQWidget* parent)
{
m_optWidget = new KisSelectionOptions(parent, m_subject);
TQ_CHECK_PTR(m_optWidget);
m_optWidget->setCaption(i18n("Elliptical Selection"));
connect (m_optWidget, TQT_SIGNAL(actionChanged(int)), this, TQT_SLOT(slotSetAction(int)));
TQVBoxLayout * l = dynamic_cast<TQVBoxLayout*>(m_optWidget->layout());
l->addItem(new TQSpacerItem(1, 1, TQSizePolicy::Fixed, TQSizePolicy::Expanding));
return m_optWidget;
}
TQWidget* KisToolSelectElliptical::optionWidget()
{
return m_optWidget;
}
#include "kis_tool_select_elliptical.moc"