WIP: KSnapshot-like screenshot grabber

WIP of a screenshot grabber accessible from the chat form to allow
users to easily send a part of a screenshot

qtox.pro

@@ -407,7 +407,6 @@ contains(ENABLE_SYSTRAY_GTK_BACKEND, NO) {
         src/offlinemsgengine.cpp \
         src/misc/qrwidget.cpp \
         src/widget/genericchatroomwidget.cpp
-
 }
 
 SOURCES += \
@@ -434,6 +433,11 @@ SOURCES += \
     src/core/corestructs.cpp \
     src/profilelocker.cpp \
     src/avatarbroadcaster.cpp
+    src/widget/tool/screenshotgrabber.cpp \
+    src/widget/tool/screengrabberchooserrectitem.cpp \
+    src/widget/tool/screengrabberoverlayitem.cpp \
+    src/widget/tool/toolboxgraphicsitem.cpp
+
 
 HEADERS += \
     src/audio.h \
@@ -458,4 +462,9 @@ HEADERS += \
     src/widget/gui.h \
     src/toxme.h \
     src/profilelocker.h \
-    src/avatarbroadcaster.h
+    src/avatarbroadcaster.h \
+    src/widget/tool/screenshotgrabber.h \
+    src/widget/tool/screengrabberchooserrectitem.hpp \
+    src/widget/tool/screengrabberoverlayitem.hpp \
+    src/widget/tool/toolboxgraphicsitem.hpp
+

src/widget/form/chatform.cpp

@@ -23,6 +23,9 @@
 #include <QFileInfo>
 #include <QDragEnterEvent>
 #include <QBitmap>
+#include <QScreen>
+#include <QTemporaryFile>
+#include <QGuiApplication>
 #include "chatform.h"
 #include "src/core/core.h"
 #include "src/friend.h"
@@ -44,6 +47,7 @@
 #include "src/chatlog/content/text.h"
 #include "src/chatlog/chatlog.h"
 #include "src/offlinemsgengine.h"
+#include "src/widget/tool/screenshotgrabber.h"
 
 ChatForm::ChatForm(Friend* chatFriend)
     : f(chatFriend)
@@ -81,6 +85,9 @@ ChatForm::ChatForm(Friend* chatFriend)
     connect(Core::getInstance(), &Core::fileSendStarted, this, &ChatForm::startFileSend);
     connect(sendButton, &QPushButton::clicked, this, &ChatForm::onSendTriggered);
     connect(fileButton, &QPushButton::clicked, this, &ChatForm::onAttachClicked);
+    fileButton->setContextMenuPolicy(Qt::CustomContextMenu);
+    connect(fileButton, &QPushButton::customContextMenuRequested, this, &ChatForm::onAttachContext);
+    connect(screenshotAction, &QAction::triggered, this, &ChatForm::onScreenshotCreate);
     connect(callButton, &QPushButton::clicked, this, &ChatForm::onCallTriggered);
     connect(videoButton, &QPushButton::clicked, this, &ChatForm::onVideoCallTriggered);
     connect(msgEdit, &ChatTextEdit::enterPressed, this, &ChatForm::onSendTriggered);
@@ -858,6 +865,45 @@ void ChatForm::loadHistory(QDateTime since, bool processUndelivered)
     chatWidget->verticalScrollBar()->setValue(savedSliderPos);
 }
 
+void ChatForm::onScreenshotCreate()
+{
+    ScreenshotGrabber *screenshotGrabber = new ScreenshotGrabber (this);
+    connect(screenshotGrabber, &ScreenshotGrabber::screenshotTaken, this, &ChatForm::onScreenshotTaken);
+    
+    // Try to not grab the context-menu
+    QTimer::singleShot(200, screenshotGrabber, &ScreenshotGrabber::showGrabber);
+}
+
+void ChatForm::onScreenshotTaken (const QPixmap &pixmap) {
+	QTemporaryFile file("qTox-Screenshot-XXXXXXXX.png");
+	
+	if (!file.open())
+	{
+	    QMessageBox::warning(this, tr("Failed to open temporary file", "Temporary file for screenshot"),
+	                         tr("qTox wasn't able to save the screenshot"));
+	    return;
+	}
+	
+	file.setAutoRemove(false);
+	
+	pixmap.save(&file, "PNG");
+	
+	long long filesize = file.size();
+	file.close();
+	QFileInfo fi(file);
+	
+	emit sendFile(f->getFriendID(), fi.fileName(), fi.filePath(), filesize);
+        
+}
+
+void ChatForm::onAttachContext(const QPoint &pos)
+{
+    QMenu* context = new QMenu(fileButton);
+    context->addAction(screenshotAction);
+
+    context->exec(fileButton->mapToGlobal(pos));
+}
+
 void ChatForm::onLoadHistory()
 {
     LoadHistoryDialog dlg;

src/widget/form/chatform.h

@@ -79,6 +79,7 @@ public slots:
     void onVolMuteToggle();
     void onAvatarChange(uint32_t FriendId, const QPixmap& pic);
     void onAvatarRemoved(uint32_t FriendId);
+    void onAttachContext(const QPoint &pos);
 
 private slots:
     void onSendTriggered();
@@ -94,6 +95,8 @@ private slots:
     void onLoadHistory();
     void onUpdateTime();
     void onEnableCallButtons();
+    void onScreenshotCreate();
+    void onScreenshotTaken(const QPixmap &pixmap);
 
 protected:
     // drag & drop
@@ -109,7 +112,7 @@ private:
     int callId;
     QLabel *callDuration;
     QTimer *callDurationTimer;
-    QTimer typingTimer;    
+    QTimer typingTimer;
     QTimer *disableCallButtonsTimer;
     QElapsedTimer timeElapsed;
     OfflineMsgEngine *offlineEngine;

src/widget/form/genericchatform.cpp

@@ -49,17 +49,17 @@ GenericChatForm::GenericChatForm(QWidget *parent)
     nameLabel->setObjectName("nameLabel");
     nameLabel->setMinimumHeight(Style::getFont(Style::Medium).pixelSize());
     nameLabel->setEditable(true);
-    nameLabel->setTextFormat(Qt::PlainText);   
+    nameLabel->setTextFormat(Qt::PlainText);
 
     avatar = new MaskablePixmapWidget(this, QSize(40,40), ":/img/avatar_mask.svg");
     QHBoxLayout *mainFootLayout = new QHBoxLayout(),
                 *headLayout = new QHBoxLayout();
-    
+
     QVBoxLayout *mainLayout = new QVBoxLayout(),
                 *footButtonsSmall = new QVBoxLayout(),
                 *micButtonsLayout = new QVBoxLayout();
-                headTextLayout = new QVBoxLayout();    
-    
+                headTextLayout = new QVBoxLayout();
+
     QGridLayout *buttonsLayout = new QGridLayout();
 
     chatWidget = new ChatLog(this);
@@ -90,6 +90,8 @@ GenericChatForm::GenericChatForm(QWidget *parent)
     // micButton->setFixedSize(25,20);
     micButton->setToolTip("");
 
+    screenshotAction = new QAction(tr("Send screenshot"), nullptr);
+
     footButtonsSmall->setSpacing(2);
 
     msgEdit->setStyleSheet(Style::getStylesheet(":/ui/msgEdit/msgEdit.css"));
@@ -127,29 +129,29 @@ GenericChatForm::GenericChatForm(QWidget *parent)
     mainFootLayout->addSpacing(5);
     mainFootLayout->addWidget(sendButton);
     mainFootLayout->setSpacing(0);
-    
-    headTextLayout->addStretch();    
+
+    headTextLayout->addStretch();
     headTextLayout->addWidget(nameLabel);
     headTextLayout->addStretch();
-    
+
     micButtonsLayout->setSpacing(0);
     micButtonsLayout->addWidget(micButton, Qt::AlignTop | Qt::AlignRight);
     micButtonsLayout->addSpacing(4);
     micButtonsLayout->addWidget(volButton, Qt::AlignTop | Qt::AlignRight);
-    
+
     buttonsLayout->addLayout(micButtonsLayout, 0, 0, 2, 1, Qt::AlignTop | Qt::AlignRight);
     buttonsLayout->addWidget(callButton, 0, 1, 2, 1, Qt::AlignTop);
     buttonsLayout->addWidget(videoButton, 0, 2, 2, 1, Qt::AlignTop);
     buttonsLayout->setVerticalSpacing(0);
     buttonsLayout->setHorizontalSpacing(4);
-        
+
     headLayout->addWidget(avatar);
     headLayout->addSpacing(5);
     headLayout->addLayout(headTextLayout);
     headLayout->addLayout(buttonsLayout);
 
     headWidget->setLayout(headLayout);
-    
+
     //Fix for incorrect layouts on OS X as per
     //https://bugreports.qt-project.org/browse/QTBUG-14591
     sendButton->setAttribute(Qt::WA_LayoutUsesWidgetRect);

src/widget/form/genericchatform.h

@@ -90,6 +90,7 @@ protected:
     MaskablePixmapWidget *avatar;
     QWidget *headWidget;
     QPushButton *fileButton, *emoteButton, *callButton, *videoButton, *volButton, *micButton;
+    QAction *screenshotAction;
     QVBoxLayout *headTextLayout;
     ChatTextEdit *msgEdit;
     QPushButton *sendButton;

src/widget/tool/screengrabberchooserrectitem.cpp

@@ -0,0 +1,316 @@
+/*
+    Copyright (C) 2014 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#include "screengrabberchooserrectitem.hpp"
+
+#include <QGraphicsSceneMouseEvent>
+#include <QGraphicsScene>
+#include <QPainter>
+#include <QCursor>
+
+enum { HandleSize = 10 };
+
+ScreenGrabberChooserRectItem::ScreenGrabberChooserRectItem(QGraphicsScene* scene)
+{
+    scene->addItem(this);
+    setCursor(QCursor(Qt::OpenHandCursor));
+    
+    this->mainRect = createHandleItem(scene);
+    this->topLeft = createHandleItem(scene);
+    this->topCenter = createHandleItem(scene);
+    this->topRight = createHandleItem(scene);
+    this->rightCenter = createHandleItem(scene);
+    this->bottomRight = createHandleItem(scene);
+    this->bottomCenter = createHandleItem(scene);
+    this->bottomLeft = createHandleItem(scene);
+    this->leftCenter = createHandleItem(scene);
+    
+    this->topLeft->setCursor(QCursor(Qt::SizeFDiagCursor));
+    this->bottomRight->setCursor(QCursor(Qt::SizeFDiagCursor));
+    this->topRight->setCursor(QCursor(Qt::SizeBDiagCursor));
+    this->bottomLeft->setCursor(QCursor(Qt::SizeBDiagCursor));
+    this->leftCenter->setCursor(QCursor(Qt::SizeHorCursor));
+    this->rightCenter->setCursor(QCursor(Qt::SizeHorCursor));
+    this->topCenter->setCursor(QCursor(Qt::SizeVerCursor));
+    this->bottomCenter->setCursor(QCursor(Qt::SizeVerCursor));
+    
+    this->mainRect->setRect(QRect());
+    hideHandles();
+    
+}
+
+ScreenGrabberChooserRectItem::~ScreenGrabberChooserRectItem()
+{
+    
+}
+
+QRectF ScreenGrabberChooserRectItem::boundingRect() const
+{
+    return QRectF(0, 0, this->rectWidth, this->rectHeight);
+}
+
+void ScreenGrabberChooserRectItem::beginResize()
+{
+    this->rectWidth = this->rectHeight = 0;
+    this->state = Resizing;
+    setCursor(QCursor(Qt::CrossCursor));
+    hideHandles();
+    this->mainRect->grabMouse();
+}
+
+QRect ScreenGrabberChooserRectItem::chosenRect() const
+{
+    QRect rect (x(), y(), this->rectWidth, this->rectHeight);
+    return rect.normalized();
+}
+
+void ScreenGrabberChooserRectItem::showHandles()
+{
+    this->topLeft->show();
+    this->topCenter->show();
+    this->topRight->show();
+    this->rightCenter->show();
+    this->bottomRight->show();
+    this->bottomCenter->show();
+    this->bottomLeft->show();
+    this->leftCenter->show();
+}
+
+void ScreenGrabberChooserRectItem::hideHandles()
+{
+    this->topLeft->hide();
+    this->topCenter->hide();
+    this->topRight->hide();
+    this->rightCenter->hide();
+    this->bottomRight->hide();
+    this->bottomCenter->hide();
+    this->bottomLeft->hide();
+    this->leftCenter->hide();
+}
+
+void ScreenGrabberChooserRectItem::mousePress(QGraphicsSceneMouseEvent* event)
+{
+    if (event->button() == Qt::LeftButton)
+    {
+        this->state = Moving;
+        setCursor(QCursor(Qt::ClosedHandCursor));
+    }
+    
+}
+
+void ScreenGrabberChooserRectItem::mouseMove(QGraphicsSceneMouseEvent* event)
+{
+    if (this->state == Moving)
+    {
+        QPointF delta = event->scenePos() - event->lastScenePos();
+        moveBy (delta.x(), delta.y());
+    }
+    else if (this->state == Resizing)
+    {
+        prepareGeometryChange();
+        QPointF size = event->scenePos() - scenePos();
+        this->mainRect->setRect (0, 0, size.x(), size.y());
+        this->rectWidth = size.x();
+        this->rectHeight = size.y();
+        
+        updateHandlePositions();
+    }
+    else
+    {
+        return;
+    }
+    
+    emit regionChosen(chosenRect());
+    scene()->update();
+}
+
+void ScreenGrabberChooserRectItem::mouseRelease(QGraphicsSceneMouseEvent* event)
+{
+    if (event->button() == Qt::LeftButton)
+    {
+        setCursor(QCursor(Qt::OpenHandCursor));
+        emit regionChosen(chosenRect());
+        this->state = None;
+        this->mainRect->ungrabMouse();
+        showHandles();
+    }
+    
+}
+
+void ScreenGrabberChooserRectItem::mouseDoubleClick(QGraphicsSceneMouseEvent* event)
+{
+    Q_UNUSED(event);
+    emit doubleClicked();
+}
+
+void ScreenGrabberChooserRectItem::mousePressHandle(int x, int y, QGraphicsSceneMouseEvent* event)
+{
+    Q_UNUSED(x);
+    Q_UNUSED(y);
+    
+    if(event->button() == Qt::LeftButton)
+        this->state = HandleResizing;
+    
+}
+
+void ScreenGrabberChooserRectItem::mouseMoveHandle(int x, int y, QGraphicsSceneMouseEvent* event)
+{
+    if (this->state != HandleResizing)
+        return;
+    
+    QPointF delta = event->scenePos() - event->lastScenePos();
+    delta.rx() *= qreal(std::abs(x));
+    delta.ry() *= qreal(std::abs(y));
+    
+    // We increase if the multiplier and the delta have the same sign
+    bool increaseX = ((x < 0) == (delta.x() < 0));
+    bool increaseY = ((y < 0) == (delta.y() < 0));
+    
+    if((delta.x() < 0 && increaseX) || (delta.x() >= 0 && !increaseX))
+    {
+        moveBy(delta.x(), 0);
+        delta.rx() *= -1;
+    }
+    
+    if((delta.y() < 0 && increaseY) || (delta.y() >= 0 && !increaseY))
+    {
+        moveBy(0, delta.y());
+        delta.ry() *= -1;
+    }
+    
+    // 
+    this->rectWidth += delta.x();
+    this->rectHeight += delta.y();
+    this->mainRect->setRect (0, 0, this->rectWidth, this->rectHeight);
+    updateHandlePositions();
+    emit regionChosen(chosenRect());
+}
+
+void ScreenGrabberChooserRectItem::mouseReleaseHandle(int x, int y, QGraphicsSceneMouseEvent* event)
+{
+    Q_UNUSED(x);
+    Q_UNUSED(y);
+    
+    if (event->button() == Qt::LeftButton)
+        this->state = None;
+    
+}
+
+QPoint ScreenGrabberChooserRectItem::getHandleMultiplier(QGraphicsItem* handle)
+{
+    if (handle == this->topLeft)
+        return QPoint(-1, -1);
+    
+    if (handle == this->topCenter)
+        return QPoint(0, -1);
+    
+    if (handle == this->topRight)
+        return QPoint(1, -1);
+    
+    if (handle == this->rightCenter)
+        return QPoint(1, 0);
+    
+    if (handle == this->bottomRight)
+        return QPoint(1, 1);
+    
+    if (handle == this->bottomCenter)
+        return QPoint(0, 1);
+    
+    if (handle == this->bottomLeft)
+        return QPoint(-1, 1);
+    
+    if (handle == this->leftCenter)
+        return QPoint(-1, 0);
+    
+    return QPoint();
+}
+
+void ScreenGrabberChooserRectItem::updateHandlePositions()
+{
+    this->topLeft->setPos(-HandleSize, -HandleSize);
+    this->topCenter->setPos((this->rectWidth - HandleSize) / 2, -HandleSize);
+    this->topRight->setPos(this->rectWidth, -HandleSize);
+    this->rightCenter->setPos(this->rectWidth, (this->rectHeight - HandleSize) / 2);
+    this->bottomRight->setPos(this->rectWidth, this->rectHeight);
+    this->bottomCenter->setPos((this->rectWidth - HandleSize) / 2, this->rectHeight);
+    this->bottomLeft->setPos(-HandleSize, this->rectHeight);
+    this->leftCenter->setPos(-HandleSize, (this->rectHeight - HandleSize) / 2);
+}
+
+QGraphicsRectItem* ScreenGrabberChooserRectItem::createHandleItem(QGraphicsScene* scene)
+{
+    QGraphicsRectItem* handle = new QGraphicsRectItem(0, 0, HandleSize, HandleSize);
+    handle->setPen(QPen(Qt::blue));
+    handle->setBrush(Qt::NoBrush);
+    
+    scene->addItem(handle);
+    addToGroup(handle);
+    
+    handle->installSceneEventFilter(this);
+    return handle;
+}
+
+bool ScreenGrabberChooserRectItem::sceneEventFilter(QGraphicsItem* watched, QEvent* event)
+{
+    if (watched == this->mainRect)
+        forwardMainRectEvent(event);
+    else
+        forwardHandleEvent(watched, event);
+    
+    return true;
+}
+
+void ScreenGrabberChooserRectItem::forwardMainRectEvent(QEvent* event)
+{
+    QGraphicsSceneMouseEvent* mouseEvent = static_cast<QGraphicsSceneMouseEvent*>(event);
+    
+    switch(event->type())
+    {
+    case QEvent::GraphicsSceneMousePress:
+        return mousePress(mouseEvent);
+    case QEvent::GraphicsSceneMouseMove:
+        return mouseMove(mouseEvent);
+    case QEvent::GraphicsSceneMouseRelease:
+        return mouseRelease(mouseEvent);
+    case QEvent::GraphicsSceneMouseDoubleClick:
+        return mouseDoubleClick(mouseEvent);
+    default:
+        return;
+    }
+    
+}
+
+void ScreenGrabberChooserRectItem::forwardHandleEvent(QGraphicsItem* watched, QEvent* event)
+{
+    QGraphicsSceneMouseEvent* mouseEvent = static_cast<QGraphicsSceneMouseEvent*>(event);
+    QPoint multiplier = getHandleMultiplier(watched);
+    
+    if (multiplier.isNull())
+        return;
+    
+    switch(event->type())
+    {
+    case QEvent::GraphicsSceneMousePress:
+        return mousePressHandle(multiplier.x(), multiplier.y(), mouseEvent);
+    case QEvent::GraphicsSceneMouseMove:
+        return mouseMoveHandle(multiplier.x(), multiplier.y(), mouseEvent);
+    case QEvent::GraphicsSceneMouseRelease:
+        return mouseReleaseHandle(multiplier.x(), multiplier.y(), mouseEvent);
+    default:
+        return;
+    }
+    
+}

src/widget/tool/screengrabberchooserrectitem.hpp

@@ -0,0 +1,89 @@
+/*
+    Copyright (C) 2014 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#ifndef SCREENGRABBERCHOOSERRECTITEM_HPP
+#define SCREENGRABBERCHOOSERRECTITEM_HPP
+
+#include <QGraphicsItemGroup>
+
+class ScreenGrabberChooserRectItem : public QObject, public QGraphicsItemGroup
+{
+    Q_OBJECT
+public:
+    ScreenGrabberChooserRectItem(QGraphicsScene* scene);
+    ~ScreenGrabberChooserRectItem();
+    
+    QRectF boundingRect() const;
+    void beginResize();
+    
+    QRect chosenRect() const;
+    
+    void showHandles();
+    void hideHandles();
+    
+signals:
+    
+    void doubleClicked();
+    void regionChosen(QRect rect);
+    
+protected:
+    bool sceneEventFilter(QGraphicsItem* watched, QEvent* event);
+    
+private:
+    
+    enum State {
+        None,
+        Resizing,
+        HandleResizing,
+        Moving,
+    };
+    
+    State state = None;
+    int rectWidth = 0;
+    int rectHeight = 0;
+    
+    void forwardMainRectEvent(QEvent* event);
+    void forwardHandleEvent(QGraphicsItem* watched, QEvent* event);
+    
+    void mousePress(QGraphicsSceneMouseEvent* event);
+    void mouseMove(QGraphicsSceneMouseEvent* event);
+    void mouseRelease(QGraphicsSceneMouseEvent* event);
+    void mouseDoubleClick(QGraphicsSceneMouseEvent* event);
+    
+    void mousePressHandle(int x, int y, QGraphicsSceneMouseEvent* event);
+    void mouseMoveHandle(int x, int y, QGraphicsSceneMouseEvent* event);
+    void mouseReleaseHandle(int x, int y, QGraphicsSceneMouseEvent* event);
+    
+    QPoint getHandleMultiplier(QGraphicsItem* handle);
+    
+    void updateHandlePositions();
+    QGraphicsRectItem* createHandleItem(QGraphicsScene* scene);
+    
+    QGraphicsRectItem* mainRect;
+    QGraphicsRectItem* topLeft;
+    QGraphicsRectItem* topCenter;
+    QGraphicsRectItem* topRight;
+    QGraphicsRectItem* rightCenter;
+    QGraphicsRectItem* bottomRight;
+    QGraphicsRectItem* bottomCenter;
+    QGraphicsRectItem* bottomLeft;
+    QGraphicsRectItem* leftCenter;
+    
+};
+
+
+
+#endif // SCREENGRABBERCHOOSERRECTITEM_HPP

src/widget/tool/screengrabberoverlayitem.cpp

@@ -0,0 +1,81 @@
+/*
+    Copyright (C) 2014 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#include "screengrabberoverlayitem.hpp"
+
+#include <QGraphicsSceneMouseEvent>
+#include <QPainter>
+#include <QPen>
+
+#include "screenshotgrabber.h"
+
+ScreenGrabberOverlayItem::ScreenGrabberOverlayItem(ScreenshotGrabber* grabber)
+    : screnshootGrabber(grabber)
+{
+    
+    QBrush overlayBrush(QColor(0x00, 0x00, 0x00, 0x70)); // Translucent black
+    
+    setCursor(QCursor(Qt::CrossCursor));
+    setBrush(overlayBrush);
+    setPen(QPen(Qt::NoPen));
+    
+}
+
+ScreenGrabberOverlayItem::~ScreenGrabberOverlayItem()
+{
+    
+}
+
+void ScreenGrabberOverlayItem::setChosenRect(QRect rect)
+{
+    this->chosenRect = rect;
+    update();
+}
+
+void ScreenGrabberOverlayItem::mousePressEvent(QGraphicsSceneMouseEvent* event)
+{
+    if (event->button() == Qt::LeftButton)
+        this->screnshootGrabber->beginRectChooser(event);
+    
+}
+
+void ScreenGrabberOverlayItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
+{
+    if (!this->chosenRect.isValid())
+    {
+        QGraphicsRectItem::paint(painter, option, widget);
+        return;
+    }
+    
+    // 
+    painter->save();
+    
+    painter->setBrush(brush());
+    painter->setPen(pen());
+    
+    QRectF self = rect();
+    qreal leftX = chosenRect.x();
+    qreal rightX = chosenRect.x() + chosenRect.width();
+    qreal topY = chosenRect.y();
+    qreal bottomY = chosenRect.y() + chosenRect.height();
+    
+    painter->drawRect(0, 0, leftX, self.height()); // Left of chosen
+    painter->drawRect(rightX, 0, self.width() - rightX, self.height()); // Right of chosen
+    painter->drawRect(leftX, 0, chosenRect.width(), topY); // Top of chosen
+    painter->drawRect(leftX, bottomY, chosenRect.width(), self.height() - bottomY); // Bottom of chosen
+    
+    painter->restore();
+}

src/widget/tool/screengrabberoverlayitem.hpp

@@ -0,0 +1,46 @@
+/*
+    Copyright (C) 2014 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#ifndef SCREENGRABBEROVERLAYITEM_HPP
+#define SCREENGRABBEROVERLAYITEM_HPP
+
+#include <QGraphicsRectItem>
+
+class ScreenshotGrabber;
+
+class ScreenGrabberOverlayItem : public QObject, public QGraphicsRectItem
+{
+    Q_OBJECT
+public:
+    ScreenGrabberOverlayItem(ScreenshotGrabber* grabber);
+    ~ScreenGrabberOverlayItem();
+    
+    void setChosenRect(QRect rect);
+    
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget);
+    
+protected:
+    void mousePressEvent(QGraphicsSceneMouseEvent* event);
+    
+private:
+    ScreenshotGrabber* screnshootGrabber;
+    
+    QRect chosenRect;
+    
+    
+};
+
+#endif // SCREENGRABBEROVERLAYITEM_HPP

src/widget/tool/screenshotgrabber.cpp

@@ -0,0 +1,183 @@
+/*
+    Copyright (C) 2015 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#include "screenshotgrabber.h"
+
+#include <QGraphicsSceneMouseEvent>
+#include <QGraphicsPixmapItem>
+#include <QGraphicsRectItem>
+#include <QDesktopWidget>
+#include <QGraphicsView>
+#include <QApplication>
+#include <QMouseEvent>
+#include <QScreen>
+#include <QDebug>
+
+#include "screengrabberchooserrectitem.hpp"
+#include "screengrabberoverlayitem.hpp"
+#include "toolboxgraphicsitem.hpp"
+
+ScreenshotGrabber::ScreenshotGrabber(QWidget* parent)
+    : QWidget(parent)
+{
+    
+    QGraphicsScene* scene = new QGraphicsScene;
+    this->window = new QGraphicsView (scene); // Top-level widget
+    setupWindow();
+    setupScene(scene);
+    
+    installEventFilter(this);
+    
+}
+
+ScreenshotGrabber::~ScreenshotGrabber()
+{
+}
+
+bool ScreenshotGrabber::eventFilter(QObject* object, QEvent* event)
+{
+    if (event->type() == QEvent::KeyPress)
+        return handleKeyPress(static_cast<QKeyEvent*>(event));
+    
+    return QWidget::eventFilter(object, event);
+}
+
+void ScreenshotGrabber::showGrabber()
+{
+    this->screenGrab = grabScreen();
+    this->screenGrabDisplay->setPixmap(this->screenGrab);
+    this->window->show();
+    this->window->setFocus();
+    this->window->grabKeyboard();
+    adjustWindowSize();
+    adjustTooltipPosition();
+}
+
+bool ScreenshotGrabber::handleKeyPress(QKeyEvent* event)
+{
+    if (event->key() == Qt::Key_Escape)
+        reject();
+    else if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter)
+        acceptRegion();
+    else
+        return false;
+    
+    return true;
+}
+
+void ScreenshotGrabber::acceptRegion()
+{
+    QRect rect = this->chooserRect->chosenRect();
+    if (rect.width() < 1 || rect.height() < 1)
+        return;
+    
+    // 
+    qDebug() << "Screenshot accepted, chosen region" << rect;
+    emit screenshotTaken(this->screenGrab.copy(rect));
+    this->window->close();
+}
+
+void ScreenshotGrabber::setupWindow()
+{
+    this->window->setWindowFlags(Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint);
+    this->window->setAttribute(Qt::WA_DeleteOnClose);
+    this->window->setContentsMargins(0, 0, 0, 0);
+    this->window->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    this->window->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    this->window->setFrameShape(QFrame::NoFrame);
+    
+    connect(this->window, &QObject::destroyed, this, &QObject::deleteLater);
+    this->window->installEventFilter(this);
+}
+
+void ScreenshotGrabber::setupScene(QGraphicsScene* scene)
+{
+    this->overlay = new ScreenGrabberOverlayItem(this);
+    this->helperToolbox = new ToolBoxGraphicsItem;
+    
+    this->screenGrabDisplay = scene->addPixmap(this->screenGrab);
+    this->helperTooltip = scene->addText(QString());
+    scene->addItem(this->overlay);
+    this->chooserRect = new ScreenGrabberChooserRectItem(scene);
+    scene->addItem(this->helperToolbox);
+    
+    this->helperToolbox->addToGroup(this->helperTooltip);
+    this->helperTooltip->setDefaultTextColor(Qt::black);
+    useNothingSelectedTooltip();
+    
+    connect(this->chooserRect, &ScreenGrabberChooserRectItem::doubleClicked, this, &ScreenshotGrabber::acceptRegion);
+    connect(this->chooserRect, &ScreenGrabberChooserRectItem::regionChosen, this, &ScreenshotGrabber::useRegionSelectedTooltip);
+    connect(this->chooserRect, &ScreenGrabberChooserRectItem::regionChosen, this->overlay, &ScreenGrabberOverlayItem::setChosenRect);
+}
+
+void ScreenshotGrabber::useNothingSelectedTooltip()
+{
+    this->helperTooltip->setHtml(tr("Click and drag to select a region to select it. Press <b>ESC</b> to cancel.",
+                                    "Help text shown when no region has been selected yet"));
+    adjustTooltipPosition();
+}
+
+void ScreenshotGrabber::useRegionSelectedTooltip()
+{
+    this->helperTooltip->setHtml(tr("Press <b>Return</b> to accept, or move and resize the selected region.",
+                                    "Help text shown when a region has been selected"));
+    adjustTooltipPosition();
+}
+
+void ScreenshotGrabber::adjustTooltipPosition()
+{
+    QRectF size = this->helperToolbox->childrenBoundingRect();
+    QRect screenRect = QApplication::desktop()->screen()->rect();
+    
+    // Align the toolbox center-top.
+    this->helperToolbox->setX(screenRect.x() + (screenRect.width() - size.width() + size.x()) / 2);
+    this->helperToolbox->setY(screenRect.y());
+    
+}
+
+void ScreenshotGrabber::reject()
+{
+    qDebug() << "Rejected screenshot";
+    this->window->close();
+    
+}
+
+QRect ScreenshotGrabber::getSystemScreenRect()
+{
+    return QApplication::primaryScreen()->virtualGeometry();
+}
+
+void ScreenshotGrabber::adjustWindowSize()
+{
+    QRect systemScreenRect = getSystemScreenRect();
+    qDebug() << "adjusting grabber size to" << systemScreenRect;
+    
+    this->window->setGeometry(systemScreenRect);
+    this->window->scene()->setSceneRect(systemScreenRect);
+    this->overlay->setRect(systemScreenRect);
+}
+
+QPixmap ScreenshotGrabber::grabScreen() {
+    return QApplication::primaryScreen()->grabWindow(QApplication::desktop()->winId());
+}
+
+void ScreenshotGrabber::beginRectChooser(QGraphicsSceneMouseEvent* event)
+{
+    QPointF pos = event->scenePos();
+    this->chooserRect->setX(pos.x());
+    this->chooserRect->setY(pos.y());
+    this->chooserRect->beginResize();
+}

src/widget/tool/screenshotgrabber.h

@@ -0,0 +1,84 @@
+/*
+    Copyright (C) 2015 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#ifndef SCREENSHOTGRABBER_H
+#define SCREENSHOTGRABBER_H
+
+#include <QWidget>
+#include <QPixmap>
+#include <QPoint>
+
+class ScreenGrabberChooserRectItem;
+class QGraphicsSceneMouseEvent;
+class ScreenGrabberOverlayItem;
+class QGraphicsPixmapItem;
+class ToolBoxGraphicsItem;
+class QGraphicsRectItem;
+class QGraphicsTextItem;
+class QGraphicsScene;
+class QGraphicsView;
+
+class ScreenshotGrabber : public QWidget
+{
+    Q_OBJECT
+public:
+	
+    ScreenshotGrabber(QWidget* parent);
+    ~ScreenshotGrabber() override;
+    
+    bool eventFilter(QObject* object, QEvent* event);
+    
+public slots:
+    
+    void showGrabber();
+    void acceptRegion();
+    
+signals:
+    void screenshotTaken(const QPixmap &pixmap);
+    void rejected();
+    
+private:
+    friend class ScreenGrabberOverlayItem;
+    
+    void setupWindow();
+    void setupScene(QGraphicsScene* scene);
+    
+    void useNothingSelectedTooltip();
+    void useRegionSelectedTooltip();
+    void adjustTooltipPosition();
+    
+    bool handleKeyPress(QKeyEvent* event);
+    void reject();
+    
+    QRect getSystemScreenRect();
+    void adjustWindowSize();
+    QPixmap grabScreen();
+    
+    void beginRectChooser(QGraphicsSceneMouseEvent* event);
+    
+    QPixmap screenGrab;
+    QGraphicsView* window;
+    QGraphicsPixmapItem* screenGrabDisplay;
+    ScreenGrabberOverlayItem* overlay;
+    ScreenGrabberChooserRectItem* chooserRect;
+    ToolBoxGraphicsItem* helperToolbox;
+    QGraphicsTextItem* helperTooltip;
+    
+};
+
+
+#endif // SCREENSHOTGRABBER_H
+

src/widget/tool/toolboxgraphicsitem.cpp

@@ -0,0 +1,64 @@
+/*
+    Copyright (C) 2014 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#include "toolboxgraphicsitem.hpp"
+
+#include <QPainter>
+
+ToolBoxGraphicsItem::ToolBoxGraphicsItem()
+{
+    this->opacityAnimation = new QPropertyAnimation(this, QByteArrayLiteral("opacity"), this);
+    
+    this->opacityAnimation->setKeyValueAt(0, this->idleOpacity);
+    this->opacityAnimation->setKeyValueAt(1, this->activeOpacity);
+    this->opacityAnimation->setDuration(this->fadeTimeMs);
+    
+    setOpacity(this->idleOpacity);
+}
+
+ToolBoxGraphicsItem::~ToolBoxGraphicsItem()
+{
+    
+}
+
+void ToolBoxGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent* event)
+{
+    startAnimation(QAbstractAnimation::Forward);
+    QGraphicsItemGroup::hoverEnterEvent(event);
+}
+
+void ToolBoxGraphicsItem::hoverLeaveEvent(QGraphicsSceneHoverEvent* event)
+{
+    startAnimation(QAbstractAnimation::Backward);
+    QGraphicsItemGroup::hoverLeaveEvent(event);
+}
+
+void ToolBoxGraphicsItem::startAnimation(QAbstractAnimation::Direction direction)
+{
+    this->opacityAnimation->setDirection(direction);
+    this->opacityAnimation->start();
+}
+
+void ToolBoxGraphicsItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
+{
+    painter->save();
+    painter->setPen(Qt::NoPen);
+    painter->setBrush(QBrush(QColor(0xFF, 0xE2, 0x82)));
+    painter->drawRect(childrenBoundingRect());
+    painter->restore();
+    
+    QGraphicsItemGroup::paint(painter, option, widget);
+}

src/widget/tool/toolboxgraphicsitem.hpp

@@ -0,0 +1,49 @@
+/*
+    Copyright (C) 2014 by Project Tox <https://tox.im>
+
+    This file is part of qTox, a Qt-based graphical interface for Tox.
+
+    This program is libre 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 3 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 COPYING file for more details.
+*/
+
+#ifndef TOOLBOXGRAPHICSITEM_HPP
+#define TOOLBOXGRAPHICSITEM_HPP
+
+#include <QGraphicsItemGroup>
+#include <QPropertyAnimation>
+#include <QObject>
+
+class ToolBoxGraphicsItem : public QObject, public QGraphicsItemGroup
+{
+    Q_OBJECT
+    Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity)
+public:
+    ToolBoxGraphicsItem();
+    ~ToolBoxGraphicsItem();
+    
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget);
+    
+protected:
+    void hoverEnterEvent(QGraphicsSceneHoverEvent* event);
+    void hoverLeaveEvent(QGraphicsSceneHoverEvent* event);
+    
+private:
+    
+    void startAnimation(QAbstractAnimation::Direction direction);
+    
+    QPropertyAnimation* opacityAnimation;
+    qreal idleOpacity = 0.7f;
+    qreal activeOpacity = 1.0f;
+    int fadeTimeMs = 300;
+    
+};
+
+#endif // TOOLBOXGRAPHICSITEM_HPP

ui/fileButton/fileButton.css

@@ -10,7 +10,7 @@ QPushButton
     height: 24px;
 }
 
-QPushButton:hover
+QAbstractButton:hover
 {
     background-color: #79c76f;
 }
@@ -25,7 +25,6 @@ QPushButton[enabled="false"]
     background-color: #919191;
 }
 
-QPushButton:focus
-{
+QPushButton:focus {
     outline: none;
 }