1 files changed, 309 insertions, 0 deletions
diff --git a/chalk/plugins/tools/defaulttools/kis_tool_gradient.cpp b/chalk/plugins/tools/defaulttools/kis_tool_gradient.cpp
new file mode 100644
index 000000000..b8f72a3bb
--- /dev/null
+++ b/chalk/plugins/tools/defaulttools/kis_tool_gradient.cpp
@@ -0,0 +1,309 @@
+/*
+ *  kis_tool_gradient.cpp - part of Chalk
+ *
+ *  Copyright (c) 2000 John Califf
+ *  Copyright (c) 2002 Patrick Julien <freak@codepimps.org>
+ *  Copyright (c) 2003 Boudewijn Rempt <boud@valdyas.org>
+ *  Copyright (c) 2004 Adrian Page <adrian@pagenet.plus.com>
+ *
+ *  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 <tqlabel.h>
+#include <tqlayout.h>
+#include <tqcheckbox.h>
+
+#include <kdebug.h>
+#include <tdeaction.h>
+#include <kcommand.h>
+#include <tdelocale.h>
+#include <knuminput.h>
+
+#include "kis_button_press_event.h"
+#include "kis_button_release_event.h"
+#include "kis_canvas_subject.h"
+#include "kis_cmb_composite.h"
+#include "kis_cursor.h"
+#include "kis_double_widget.h"
+#include "kis_gradient_painter.h"
+#include "kis_move_event.h"
+#include "kis_painter.h"
+#include "kis_progress_display_interface.h"
+#include "kis_tool_gradient.h"
+#include "kis_undo_adapter.h"
+#include "kis_canvas.h"
+#include "kis_canvas_painter.h"
+
+KisToolGradient::KisToolGradient()
+    : super(i18n("Gradient")),
+      m_dragging( false )
+{
+    setName("tool_gradient");
+    setCursor(KisCursor::load("tool_gradient_cursor.png", 6, 6));
+
+    m_startPos = KisPoint(0, 0);
+    m_endPos = KisPoint(0, 0);
+
+    m_reverse = false;
+    m_shape = KisGradientPainter::GradientShapeLinear;
+    m_repeat = KisGradientPainter::GradientRepeatNone;
+    m_antiAliasThreshold = 0.2;
+}
+
+KisToolGradient::~KisToolGradient()
+{
+}
+
+void KisToolGradient::update(KisCanvasSubject *subject)
+{
+    m_subject = subject;
+    super::update(m_subject);
+}
+
+void KisToolGradient::paint(KisCanvasPainter& gc)
+{
+    if (m_dragging)
+        paintLine(gc);
+}
+
+void KisToolGradient::paint(KisCanvasPainter& gc, const TQRect&)
+{
+    if (m_dragging)
+        paintLine(gc);
+}
+
+void KisToolGradient::buttonPress(KisButtonPressEvent *e)
+{
+    if (!m_subject || !m_subject->currentImg()) {
+        return;
+    }
+
+    if (e->button() == Qt::LeftButton) {
+        m_dragging = true;
+        m_startPos = e->pos();
+        m_endPos = e->pos();
+    }
+}
+
+void KisToolGradient::move(KisMoveEvent *e)
+{
+    if (m_dragging) {
+        if (m_startPos != m_endPos) {
+            paintLine();
+        }
+
+        if ((e->state() & TQt::ShiftButton) == TQt::ShiftButton) {
+            m_endPos = straightLine(e->pos());
+        }
+        else {
+            m_endPos = e->pos();
+        }
+
+        paintLine();
+    }
+}
+
+void KisToolGradient::buttonRelease(KisButtonReleaseEvent *e)
+{
+    if (m_dragging && e->button() == Qt::LeftButton) {
+
+        KisCanvasController *controller = m_subject->canvasController();
+        KisImageSP img = m_subject->currentImg();
+
+        m_dragging = false;
+
+        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 (img && (device = img->activeDevice())) {
+
+            KisGradientPainter painter(device);
+
+            if (img->undo())  painter.beginTransaction(i18n("Gradient"));
+
+            painter.setPaintColor(m_subject->fgColor());
+            painter.setGradient(*(m_subject->currentGradient()));
+            painter.setOpacity(m_opacity);
+            painter.setCompositeOp(m_compositeOp);
+
+            KisProgressDisplayInterface *progress = m_subject->progressDisplay();
+
+            if (progress) {
+                progress->setSubject(&painter, true, true);
+            }
+
+            bool painted = painter.paintGradient(m_startPos, m_endPos, m_shape, m_repeat, m_antiAliasThreshold, m_reverse, 0, 0, m_subject->currentImg()->width(), m_subject->currentImg()->height());
+
+            if (painted) {
+                // does whole thing at moment
+                device->setDirty(painter.dirtyRect());
+
+                notifyModified();
+
+                if (img->undo()) {
+                    img->undoAdapter()->addCommand(painter.endTransaction());
+                }
+            }
+
+            /* remove remains of the line drawn while moving */
+            if (controller->kiscanvas()) {
+                controller->kiscanvas()->update();
+            }
+
+        }
+    }
+}
+
+KisPoint KisToolGradient::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 KisToolGradient::paintLine()
+{
+    if (m_subject) {
+        KisCanvasController *controller = m_subject->canvasController();
+        KisCanvas *canvas = controller->kiscanvas();
+        KisCanvasPainter gc(canvas);
+
+        paintLine(gc);
+    }
+}
+
+void KisToolGradient::paintLine(KisCanvasPainter& gc)
+{
+    if (m_subject) {
+        KisCanvasController *controller = m_subject->canvasController();
+
+        KisPoint start = controller->windowToView(m_startPos);
+        KisPoint end = controller->windowToView(m_endPos);
+
+        RasterOp op = gc.rasterOp();
+        TQPen old = gc.pen();
+        TQPen pen(TQt::SolidLine);
+
+        gc.setRasterOp(TQt::NotROP);
+        gc.setPen(pen);
+        gc.drawLine(start.floorTQPoint(), end.floorTQPoint());
+        gc.setRasterOp(op);
+        gc.setPen(old);
+    }
+}
+
+TQWidget* KisToolGradient::createOptionWidget(TQWidget* parent)
+{
+    TQWidget *widget = super::createOptionWidget(parent);
+    TQ_CHECK_PTR(widget);
+
+    m_lbShape = new TQLabel(i18n("Shape:"), widget);
+    m_lbRepeat = new TQLabel(i18n("Repeat:"), widget);
+
+    m_ckReverse = new TQCheckBox(i18n("Reverse"), widget, "reverse_check");
+    connect(m_ckReverse, TQT_SIGNAL(toggled(bool)), this, TQT_SLOT(slotSetReverse(bool)));
+
+    m_cmbShape = new TQComboBox(false, widget, "shape_combo");
+    connect(m_cmbShape, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotSetShape(int)));
+    m_cmbShape->insertItem(i18n("Linear"));
+    m_cmbShape->insertItem(i18n("Bi-Linear"));
+    m_cmbShape->insertItem(i18n("Radial"));
+    m_cmbShape->insertItem(i18n("Square"));
+    m_cmbShape->insertItem(i18n("Conical"));
+    m_cmbShape->insertItem(i18n("Conical Symmetric"));
+
+    m_cmbRepeat = new TQComboBox(false, widget, "repeat_combo");
+    connect(m_cmbRepeat, TQT_SIGNAL(activated(int)), this, TQT_SLOT(slotSetRepeat(int)));
+    m_cmbRepeat->insertItem(i18n("None"));
+    m_cmbRepeat->insertItem(i18n("Forwards"));
+    m_cmbRepeat->insertItem(i18n("Alternating"));
+
+    addOptionWidgetOption(m_cmbShape, m_lbShape);
+
+    addOptionWidgetOption(m_cmbRepeat, m_lbRepeat);
+
+    addOptionWidgetOption(m_ckReverse);
+
+    m_lbAntiAliasThreshold = new TQLabel(i18n("Anti-alias threshold:"), widget);
+
+    m_slAntiAliasThreshold = new KDoubleNumInput(widget, "threshold_slider");
+    m_slAntiAliasThreshold->setRange( 0, 1); 
+    m_slAntiAliasThreshold->setValue(m_antiAliasThreshold);
+    connect(m_slAntiAliasThreshold, TQT_SIGNAL(valueChanged(double)), this, TQT_SLOT(slotSetAntiAliasThreshold(double)));
+
+    addOptionWidgetOption(m_slAntiAliasThreshold, m_lbAntiAliasThreshold);
+
+    return widget;
+}
+
+void KisToolGradient::slotSetShape(int shape)
+{
+    m_shape = static_cast<KisGradientPainter::enumGradientShape>(shape);
+}
+
+void KisToolGradient::slotSetRepeat(int repeat)
+{
+    m_repeat = static_cast<KisGradientPainter::enumGradientRepeat>(repeat);
+}
+
+void KisToolGradient::slotSetReverse(bool state)
+{
+    m_reverse = state;
+}
+
+void KisToolGradient::slotSetAntiAliasThreshold(double value)
+{
+    m_antiAliasThreshold = value;
+}
+
+void KisToolGradient::setup(TDEActionCollection *collection)
+{
+    m_action = static_cast<TDERadioAction *>(collection->action(name()));
+
+    if (m_action == 0) {
+        m_action = new TDERadioAction(i18n("&Gradient"),
+                        "tool_gradient", TQt::Key_G, this,
+                        TQT_SLOT(activate()), collection,
+                        name());
+        m_action->setToolTip(i18n("Draw a gradient"));
+        m_action->setExclusiveGroup("tools");
+        m_ownAction = true;
+    }
+}
+
+#include "kis_tool_gradient.moc"
+