File indexing completed on 2024-06-16 04:15:59

 /*
  *  SPDX-FileCopyrightText: 2010 Adam Celarek <kdedev at xibo dot at>
  *
  *  SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include "kis_color_selector_base.h"
 
 #include <QMouseEvent>
 #include <QApplication>
 #include <QDesktopWidget>
 #include <QScreen>
 #include <QTimer>
 #include <QCursor>
 #include <QPainter>
 #include <QMimeData>
 
 #include <kconfig.h>
 #include <kconfiggroup.h>
 #include <ksharedconfig.h>
 
 #include "KoColorSpace.h"
 #include "KoColorSpaceRegistry.h"
 
 #include "kis_canvas2.h"
 #include "kis_canvas_resource_provider.h"
 #include "kis_node.h"
 #include "KisViewManager.h"
 #include <KisView.h>
 #include "kis_image.h"
 #include "kis_global.h"
 #include "kis_display_color_converter.h"
 
 #include <resources/KoGamutMask.h>
 
 class KisColorPreviewPopup : public QWidget {
 public:
     KisColorPreviewPopup(KisColorSelectorBase* parent)
         : QWidget(parent), m_parent(parent)
     {
         setWindowFlags(Qt::ToolTip | Qt::NoDropShadowWindowHint);
         setQColor(QColor(0,0,0));
         m_baseColor = QColor(0,0,0,0);
         m_previousColor = QColor(0,0,0,0);
         m_lastUsedColor = QColor(0,0,0,0);
     }
 
     void show()
     {
         updatePosition();
         QWidget::show();
     }
 
     void updatePosition()
     {
         QPoint parentPos = m_parent->mapToGlobal(QPoint(0,0));
         const QRect availRect = QApplication::desktop()->availableGeometry(this);
         QPoint targetPos;
         if ( parentPos.x() - 100 > availRect.x() ) {
             targetPos =  QPoint(parentPos.x() - 100, parentPos.y());
         } else if ( parentPos.x() + m_parent->width() + 100 < availRect.right()) {
             targetPos = m_parent->mapToGlobal(QPoint(m_parent->width(), 0));
         } else if ( parentPos.y() - 100 > availRect.y() ) {
             targetPos =  QPoint(parentPos.x(), parentPos.y() - 100);
         } else {
             targetPos =  QPoint(parentPos.x(), parentPos.y() + m_parent->height());
         }
         setGeometry(targetPos.x(), targetPos.y(), 100, 150);
         setAttribute(Qt::WA_TranslucentBackground);
     }
 
     void setQColor(const QColor& color)
     {
         m_color = color;
         update();
     }
 
     void setPreviousColor()
     {
         m_previousColor = m_baseColor;
     }
 
     void setBaseColor(const QColor& color)
     {
         m_baseColor = color;
         update();
     }
 
     void setLastUsedColor(const QColor& color)
     {
         m_lastUsedColor = color;
         update();
     }
 
 protected:
     void paintEvent(QPaintEvent *e) override {
         Q_UNUSED(e);
         QPainter p(this);
         p.fillRect(0, 0, width(), width(), m_color);
         p.fillRect(50, width(), width(), height(), m_previousColor);
         p.fillRect(0, width(), 50, height(), m_lastUsedColor);
     }
 
     void enterEvent(QEvent *e) override {
         QWidget::enterEvent(e);
         m_parent->tryHideAllPopups();
     }
 
     void leaveEvent(QEvent *e) override {
         QWidget::leaveEvent(e);
         m_parent->tryHideAllPopups();
     }
 
 private:
     KisColorSelectorBase* m_parent;
     QColor m_color;
     QColor m_baseColor;
     QColor m_previousColor;
     QColor m_lastUsedColor;
 };
 
 KisColorSelectorBase::KisColorSelectorBase(QWidget *parent) :
     QWidget(parent),
     m_canvas(0),
     m_popup(0),
     m_parent(0),
     m_colorUpdateAllowed(true),
     m_colorUpdateSelf(false),
     m_hideTimer(new QTimer(this)),
     m_popupOnMouseOver(false),
     m_popupOnMouseClick(true),
     m_colorSpace(0),
     m_isPopup(false),
     m_hideOnMouseClick(false),
     m_colorPreviewPopup(new KisColorPreviewPopup(this))
 {
     m_hideTimer->setInterval(0);
     m_hideTimer->setSingleShot(true);
     connect(m_hideTimer, SIGNAL(timeout()), this, SLOT(hidePopup()));
 
     using namespace std::placeholders; // For _1 placeholder
     auto function = std::bind(&KisColorSelectorBase::slotUpdateColorAndPreview, this, _1);
     m_updateColorCompressor.reset(new ColorCompressorType(20 /* ms */, function));
 }
 
 KisColorSelectorBase::~KisColorSelectorBase()
 {
     delete m_popup;
     delete m_colorPreviewPopup;
 }
 
 void KisColorSelectorBase::setPopupBehaviour(bool onMouseOver, bool onMouseClick)
 {
     m_popupOnMouseClick = onMouseClick;
     m_popupOnMouseOver = onMouseOver;
     if(onMouseClick) {
         m_popupOnMouseOver = false;
     }
 
     if(m_popupOnMouseOver) {
         setMouseTracking(true);
     }
 }
 
 void KisColorSelectorBase::setColorSpace(const KoColorSpace *colorSpace)
 {
     m_colorSpace = colorSpace;
 }
 
 void KisColorSelectorBase::setCanvas(KisCanvas2 *canvas)
 {
     if (m_canvas) {
         m_canvas->disconnectCanvasObserver(this);
     }
     m_canvas = canvas;
     if (m_canvas) {
         connect(m_canvas->resourceManager(), SIGNAL(canvasResourceChanged(int,QVariant)),
                 SLOT(canvasResourceChanged(int,QVariant)), Qt::UniqueConnection);
 
         connect(m_canvas->displayColorConverter(), SIGNAL(displayConfigurationChanged()),
                 SLOT(reset()), Qt::UniqueConnection);
 
         connect(canvas->imageView()->resourceProvider(), SIGNAL(sigFGColorUsed(KoColor)),
                 this,                               SLOT(updateLastUsedColorPreview(KoColor)), Qt::UniqueConnection);
 
         if (m_canvas->viewManager() && m_canvas->viewManager()->canvasResourceProvider()) {
             setColor(Acs::currentColor(m_canvas->viewManager()->canvasResourceProvider(), Acs::Foreground));
         }
     }
     if (m_popup) {
         m_popup->setCanvas(canvas);
     }
 
     reset();
 }
 
 void KisColorSelectorBase::unsetCanvas()
 {
     if (m_popup) {
         m_popup->unsetCanvas();
     }
     m_canvas = 0;
 }
 
 
 
 void KisColorSelectorBase::mousePressEvent(QMouseEvent* event)
 {
     event->accept();
 
     if(!m_isPopup && m_popupOnMouseClick &&
        event->button() == Qt::MiddleButton) {
 
         lazyCreatePopup();
 
         int x = event->globalX();
         int y = event->globalY();
         int popupsize = m_popup->width();
         x-=popupsize/2;
         y-=popupsize/2;
 
         const QRect availRect = QApplication::desktop()->availableGeometry(this);
 
         if(x<availRect.x())
             x = availRect.x();
         if(y<availRect.y())
             y = availRect.y();
         if(x+m_popup->width()>availRect.x()+availRect.width())
             x = availRect.x()+availRect.width()-m_popup->width();
         if(y+m_popup->height()>availRect.y()+availRect.height())
             y = availRect.y()+availRect.height()-m_popup->height();
 
         m_colorUpdateSelf=false;
         m_popup->move(x, y);
         m_popup->setHidingTime(200);
         showPopup(DontMove);
 
     } else if (m_isPopup && event->button() == Qt::MiddleButton) {
         if (m_colorPreviewPopup) {
             m_colorPreviewPopup->hide();
         }
         hide();
     } else {
         m_colorUpdateSelf=true;
         showColorPreview();
         event->ignore();
     }
 }
 
 void KisColorSelectorBase::mouseReleaseEvent(QMouseEvent *e) {
 
    Q_UNUSED(e);
 
     if (e->button() == Qt::MiddleButton) {
         e->accept();
     } else if (m_isPopup &&
                (m_hideOnMouseClick && !m_popupOnMouseOver) &&
                !m_hideTimer->isActive()) {
         if (m_colorPreviewPopup) {
             m_colorPreviewPopup->hide();
         }
         hide();
     }
 }
 
 void KisColorSelectorBase::enterEvent(QEvent *e)
 {
     if (m_popup && m_popup->isVisible()) {
         m_popup->m_hideTimer->stop();
     }
 
     if (m_isPopup && m_hideTimer->isActive()) {
         m_hideTimer->stop();
     }
 
     // do not show the popup when boxed in
     // the configuration dialog (m_canvas == 0)
 
     if (m_canvas &&
         !m_isPopup && m_popupOnMouseOver &&
         (!m_popup || m_popup->isHidden())) {
 
         lazyCreatePopup();
 
         const QRect availRect = QApplication::desktop()->availableGeometry(this);
 
         QPoint proposedTopLeft = rect().center() - m_popup->rect().center();
         proposedTopLeft = mapToGlobal(proposedTopLeft);
 
         QRect popupRect = QRect(proposedTopLeft, m_popup->size());
         popupRect = kisEnsureInRect(popupRect, availRect);
 
         m_popup->setGeometry(popupRect);
         m_popup->setHidingTime(200);
         showPopup(DontMove);
     }
 
     QWidget::enterEvent(e);
 }
 
 void KisColorSelectorBase::leaveEvent(QEvent *e)
 {
     tryHideAllPopups();
     QWidget::leaveEvent(e);
 }
 
 void KisColorSelectorBase::keyPressEvent(QKeyEvent *)
 {
     if (m_isPopup) {
         hidePopup();
     }
 }
 
 void KisColorSelectorBase::dragEnterEvent(QDragEnterEvent *e)
 {
     if(e->mimeData()->hasColor())
         e->acceptProposedAction();
     if(e->mimeData()->hasText() && QColor(e->mimeData()->text()).isValid())
         e->acceptProposedAction();
 }
 
 void KisColorSelectorBase::dropEvent(QDropEvent *e)
 {
     QColor color;
     if(e->mimeData()->hasColor()) {
         color = qvariant_cast<QColor>(e->mimeData()->colorData());
     }
     else if(e->mimeData()->hasText()) {
         color.setNamedColor(e->mimeData()->text());
         if(!color.isValid())
             return;
     }
 
     KoColor kocolor(color , KoColorSpaceRegistry::instance()->rgb8());
     updateColor(kocolor, Acs::Foreground, true);
 }
 
 void KisColorSelectorBase::updateColor(const KoColor &color, Acs::ColorRole role, bool needsExplicitColorReset)
 {
     commitColor(color, role);
 
     if (needsExplicitColorReset) {
         setColor(color);
     }
 }
 
 void KisColorSelectorBase::requestUpdateColorAndPreview(const KoColor &color, Acs::ColorRole role)
 {
     m_updateColorCompressor->start(qMakePair(color, role));
 }
 
 void KisColorSelectorBase::slotUpdateColorAndPreview(QPair<KoColor, Acs::ColorRole> color)
 {
     updateColorPreview(color.first);
     updateColor(color.first, color.second, false);
 }
 
 void KisColorSelectorBase::setColor(const KoColor& color)
 {
     Q_UNUSED(color);
 }
 
 void KisColorSelectorBase::setHidingTime(int time)
 {
     KIS_ASSERT_RECOVER_NOOP(m_isPopup);
 
     m_hideTimer->setInterval(time);
 }
 
 void KisColorSelectorBase::lazyCreatePopup()
 {
     if (!m_popup) {
         m_popup = createPopup();
         Q_ASSERT(m_popup);
         m_popup->setParent(this);
 
         // Setting Qt::BypassWindowManagerHint will prevent
         // the WM from showing another taskbar entry,
         // but will require that we handle window activation manually
         m_popup->setWindowFlags(Qt::FramelessWindowHint |
 #if defined(Q_OS_MACOS) || defined(Q_OS_ANDROID)
                                 Qt::Popup |
 #else
                                 Qt::Window |
 #endif
                                 Qt::NoDropShadowWindowHint |
                                 Qt::BypassWindowManagerHint);
         m_popup->m_parent = this;
         m_popup->m_isPopup = true;
     }
     m_popup->setCanvas(m_canvas);
     m_popup->updateSettings();
 }
 
 void KisColorSelectorBase::showPopup(Move move)
 {
     // This slot may be called by some action,
     // so we need to be able to handle it
     lazyCreatePopup();
 
     QPoint cursorPos = QCursor::pos();
     QScreen *activeScreen = 0;
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
     activeScreen = QGuiApplication::screenAt(cursorPos);
 #endif
     const QRect availRect = (activeScreen)? activeScreen->availableGeometry() : QApplication::desktop()->availableGeometry(this);
 
     if (move == MoveToMousePosition) {
         m_popup->move(QPoint(cursorPos.x()-m_popup->width()/2, cursorPos.y()-m_popup->height()/2));
         QRect rc = m_popup->geometry();
         if (rc.x() < availRect.x()) rc.setX(availRect.x());
         if (rc.y() < availRect.y()) rc.setY(availRect.y());
         m_popup->setGeometry(rc);
     }
 
     if (m_colorPreviewPopup) {
         m_colorPreviewPopup->hide();
     }
 
     m_popup->show();
     m_popup->m_colorPreviewPopup->show();
 }
 
 void KisColorSelectorBase::hidePopup()
 {
     KIS_ASSERT_RECOVER_RETURN(m_isPopup);
 
     m_colorPreviewPopup->hide();
     hide();
 }
 
 void KisColorSelectorBase::commitColor(const KoColor& color, Acs::ColorRole role)
 {
     if (!m_canvas)
         return;
 
     m_colorUpdateAllowed=false;
 
     if (role == Acs::Foreground)
         m_canvas->resourceManager()->setForegroundColor(color);
     else
         m_canvas->resourceManager()->setBackgroundColor(color);
 
     m_colorUpdateAllowed=true;
 }
 
 void KisColorSelectorBase::showColorPreview()
 {
     if(m_colorPreviewPopup->isHidden()) {
         m_colorPreviewPopup->show();
     }
 }
 
 void KisColorSelectorBase::updateColorPreview(const KoColor &color)
 {
     m_colorPreviewPopup->setQColor(converter()->toQColor(color));
 }
 
 void KisColorSelectorBase::canvasResourceChanged(int key, const QVariant &v)
 {
     if (key == KoCanvasResource::ForegroundColor || key == KoCanvasResource::BackgroundColor) {
         KoColor realColor(v.value<KoColor>());
         updateColorPreview(realColor);
         if (m_colorUpdateAllowed && !m_colorUpdateSelf) {
             setColor(realColor);
         }
     }
 }
 
 const KoColorSpace* KisColorSelectorBase::colorSpace() const
 {
     return converter()->paintingColorSpace();
 }
 
 void KisColorSelectorBase::updateSettings()
 {
     if(m_popup) {
         m_popup->updateSettings();
     }
 
     KConfigGroup cfg =  KSharedConfig::openConfig()->group("advancedColorSelector");
 
 
    int zoomSelectorOptions =  (int) cfg.readEntry("zoomSelectorOptions", 0) ;
    if (zoomSelectorOptions == 0)   {
        setPopupBehaviour(false, true);   // middle mouse button click will open zoom selector
    } else if (zoomSelectorOptions == 1)   {
        setPopupBehaviour(true, false);   // move over will open the zoom selector
    }
    else
    {
         setPopupBehaviour(false, false); // do not show zoom selector
    }
 
 
     if(m_isPopup) {
         m_hideOnMouseClick = cfg.readEntry("hidePopupOnClickCheck", false);
         const int zoomSize = cfg.readEntry("zoomSize", 280);
         resize(zoomSize, zoomSize);
     }
 
     reset();
 }
 
 void KisColorSelectorBase::reset()
 {
     update();
 }
 
 void KisColorSelectorBase::updateBaseColorPreview(const KoColor &color)
 {
     m_colorPreviewPopup->setBaseColor(converter()->toQColor(color));
 }
 
 void KisColorSelectorBase::updatePreviousColorPreview()
 {
     m_colorPreviewPopup->setPreviousColor();
 }
 
 void KisColorSelectorBase::updateLastUsedColorPreview(const KoColor &color)
 {
     m_colorPreviewPopup->setLastUsedColor(converter()->toQColor(color));
 }
 
 KisDisplayColorConverter* KisColorSelectorBase::converter() const
 {
     return m_canvas ?
         m_canvas->displayColorConverter() :
                 KisDisplayColorConverter::dumbConverterInstance();
 }
 
 void KisColorSelectorBase::tryHideAllPopups()
 {
     if (m_colorPreviewPopup->isVisible()) {
         m_colorUpdateSelf=false; //this is for allowing advanced selector to listen to outside color-change events.
         m_colorPreviewPopup->hide();
     }
 
     if (m_popup && m_popup->isVisible()) {
         m_popup->m_hideTimer->start();
     }
 
     if (m_isPopup && !m_hideTimer->isActive()) {
         m_hideTimer->start();
     }
 }
 
 
 void KisColorSelectorBase::mouseMoveEvent(QMouseEvent *event)
 {
     event->accept();
 }
 
 
 void KisColorSelectorBase::changeEvent(QEvent *event)
 {
     // hide the popup when another window becomes active, e.g. due to alt+tab
     if(m_isPopup && event->type() == QEvent::ActivationChange && !isActiveWindow()) {
         hidePopup();
     }
 
     QWidget::changeEvent(event);
 }
 
 void KisColorSelectorBase::showEvent(QShowEvent *event)
 {
     QWidget::showEvent(event);
 
     // manual activation required due to Qt::BypassWindowManagerHint
     if(m_isPopup) {
         activateWindow();
     }
 }