1 files changed, 191 insertions, 0 deletions
diff --git a/krita/plugins/tools/defaulttools/kis_tool_zoom.cc b/krita/plugins/tools/defaulttools/kis_tool_zoom.cc
new file mode 100644
index 00000000..a5567f83
--- /dev/null
+++ b/krita/plugins/tools/defaulttools/kis_tool_zoom.cc
@@ -0,0 +1,191 @@
+/*
+ *  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 = QPoint(0, 0);
+    m_endPos = QPoint(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, SIGNAL(timeout()), 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, QRect());
+}
+
+void KisToolZoom::paint(KisCanvasPainter& gc, const QRect& 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().floorQPoint();
+            m_endPos = e->pos().floorQPoint();
+            m_dragging = true;
+        }
+    }
+}
+
+void KisToolZoom::move(KisMoveEvent *e)
+{
+    if (m_subject && m_dragging) {
+        if (m_startPos != m_endPos)
+            paintOutline();
+
+        m_endPos = e->pos().floorQPoint();
+        paintOutline();
+    }
+}
+
+void KisToolZoom::buttonRelease(KisButtonReleaseEvent *e)
+{
+    if (m_subject && m_dragging && e->button() == Qt::LeftButton) {
+
+        KisCanvasController *controller = m_subject->canvasController();
+        m_endPos = e->pos().floorQPoint();
+        m_dragging = false;
+
+        QPoint delta = m_endPos - m_startPos;
+
+        if (sqrt(delta.x() * delta.x() + delta.y() * delta.y()) < 10) {
+            if (e->state() & Qt::ControlButton) {
+                controller->zoomOut(m_endPos.x(), m_endPos.y());
+            } else {
+                controller->zoomIn(m_endPos.x(), m_endPos.y());
+            }
+        } else {
+            controller->zoomTo(QRect(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() & (Qt::ShiftButton|Qt::ControlButton|Qt::AltButton);
+#else
+    int state = kapp->keyboardModifiers() & (KApplication::ShiftModifier
+            |KApplication::ControlModifier|KApplication::Modifier1);
+#endif
+
+    if (state & Qt::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);
+        QRect rc;
+
+        paintOutline(gc, rc);
+    }
+}
+
+void KisToolZoom::paintOutline(KisCanvasPainter& gc, const QRect&)
+{
+    if (m_subject) {
+        KisCanvasController *controller = m_subject->canvasController();
+        RasterOp op = gc.rasterOp();
+        QPen old = gc.pen();
+        QPen pen(Qt::DotLine);
+        QPoint start;
+        QPoint end;
+
+        Q_ASSERT(controller);
+        start = controller->windowToView(m_startPos);
+        end = controller->windowToView(m_endPos);
+
+        gc.setRasterOp(Qt::NotROP);
+        gc.setPen(pen);
+        gc.drawRect(QRect(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", Qt::Key_Z, this, SLOT(activate()), collection, name());
+        m_action->setToolTip(i18n("Zoom"));
+        m_action->setExclusiveGroup("tools");
+        m_ownAction = true;
+    }
+}
+
+#include "kis_tool_zoom.moc"