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koffice/chalk/plugins/tools/defaulttools/kis_tool_zoom.cc

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/*
* Copyright (c) 1999 Matthias Elter <me@kde.org>
* Copyright (c) 2002 Patrick Julien <freak@codepimps.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 <kaction.h>
#include <klocale.h>
#include <kapplication.h>
#include "kis_image.h"
#include "kis_paint_device.h"
#include "kis_paint_layer.h"
#include "kis_canvas_controller.h"
#include "kis_canvas_subject.h"
#include "kis_canvas.h"
#include "kis_canvas_painter.h"
#include "kis_cursor.h"
#include "kis_button_press_event.h"
#include "kis_button_release_event.h"
#include "kis_move_event.h"
#include "kis_tool_zoom.h"
KisToolZoom::KisToolZoom()
: super(i18n("Zoom Tool"))
{
setName("tool_zoom");
m_subject = 0;
m_dragging = false;
m_startPos = TQPoint(0, 0);
m_endPos = TQPoint(0, 0);
m_plusCursor = KisCursor::load("tool_zoom_plus_cursor.png", 8, 8);
m_minusCursor = KisCursor::load("tool_zoom_minus_cursor.png", 8, 8);
setCursor(m_plusCursor);
connect(&m_timer, TQT_SIGNAL(timeout()), TQT_SLOT(slotTimer()));
}
KisToolZoom::~KisToolZoom()
{
}
void KisToolZoom::update(KisCanvasSubject *subject)
{
m_subject = subject;
super::update(m_subject);
}
void KisToolZoom::paint(KisCanvasPainter& gc)
{
if (m_dragging)
paintOutline(gc, TQRect());
}
void KisToolZoom::paint(KisCanvasPainter& gc, const TQRect& rc)
{
if (m_dragging)
paintOutline(gc, rc);
}
void KisToolZoom::buttonPress(KisButtonPressEvent *e)
{
if (m_subject && m_subject->currentImg() && !m_dragging) {
if (e->button() == Qt::LeftButton) {
m_startPos = e->pos().floorTQPoint();
m_endPos = e->pos().floorTQPoint();
m_dragging = true;
}
}
}
void KisToolZoom::move(KisMoveEvent *e)
{
if (m_subject && m_dragging) {
if (m_startPos != m_endPos)
paintOutline();
m_endPos = e->pos().floorTQPoint();
paintOutline();
}
}
void KisToolZoom::buttonRelease(KisButtonReleaseEvent *e)
{
if (m_subject && m_dragging && e->button() == Qt::LeftButton) {
KisCanvasController *controller = m_subject->canvasController();
m_endPos = e->pos().floorTQPoint();
m_dragging = false;
TQPoint delta = m_endPos - m_startPos;
if (sqrt(delta.x() * delta.x() + delta.y() * delta.y()) < 10) {
if (e->state() & TQt::ControlButton) {
controller->zoomOut(m_endPos.x(), m_endPos.y());
} else {
controller->zoomIn(m_endPos.x(), m_endPos.y());
}
} else {
controller->zoomTo(TQRect(m_startPos, m_endPos));
}
}
}
void KisToolZoom::activate()
{
super::activate();
m_timer.start(50);
}
void KisToolZoom::deactivate()
{
m_timer.stop();
}
void KisToolZoom::slotTimer()
{
#if KDE_IS_VERSION(3,4,0)
int state = kapp->keyboardMouseState() & (TQt::ShiftButton|TQt::ControlButton|TQt::AltButton);
#else
int state = kapp->keyboardModifiers() & (KApplication::ShiftModifier
|KApplication::ControlModifier|KApplication::Modifier1);
#endif
if (state & TQt::ControlButton) {
m_subject->canvasController()->setCanvasCursor(m_minusCursor);
} else {
m_subject->canvasController()->setCanvasCursor(m_plusCursor);
}
}
void KisToolZoom::paintOutline()
{
if (m_subject) {
KisCanvasController *controller = m_subject->canvasController();
KisCanvas *canvas = controller->kiscanvas();
KisCanvasPainter gc(canvas);
TQRect rc;
paintOutline(gc, rc);
}
}
void KisToolZoom::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);
end = controller->windowToView(m_endPos);
gc.setRasterOp(TQt::NotROP);
gc.setPen(pen);
gc.drawRect(TQRect(start, end));
gc.setRasterOp(op);
gc.setPen(old);
}
}
void KisToolZoom::setup(KActionCollection *collection)
{
m_action = static_cast<KRadioAction *>(collection->action(name()));
if (m_action == 0) {
m_action = new KRadioAction(i18n("&Zoom"), "tool_zoom", TQt::Key_Z, this, TQT_SLOT(activate()), collection, name());
m_action->setToolTip(i18n("Zoom"));
m_action->setExclusiveGroup("tools");
m_ownAction = true;
}
}
#include "kis_tool_zoom.moc"