Add basic code for the Pin tool

2018-04-17 00:06:57 +02:00
parent 344d327528
commit 205cd7c87b
13 changed files with 293 additions and 2 deletions
--- a/src/tools/pin/pinwidget.cpp
+++ b/src/tools/pin/pinwidget.cpp
@@ -0,0 +1,75 @@
+// Copyright(c) 2017-2018 Alejandro Sirgo Rica & Contributors
+//
+// This file is part of Flameshot.
+//
+//     Flameshot 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 3 of the License, or
+//     (at your option) any later version.
+//
+//     Flameshot 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 Flameshot.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "pinwidget.h"
+#include <QLabel>
+#include <QVBoxLayout>
+#include <QWheelEvent>
+#include <QApplication>
+#include <QShortcut>
+
+PinWidget::PinWidget(const QPixmap &pixmap, QWidget *parent) :
+    QWidget(parent), m_pixmap(pixmap)
+{
+    setWindowFlags(Qt::WindowStaysOnTopHint
+                   | Qt::FramelessWindowHint);
+    m_layout = new QVBoxLayout(this);
+
+    m_label = new QLabel();
+    m_label->setPixmap(m_pixmap);
+    m_layout->addWidget(m_label);
+
+    new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
+    new QShortcut(Qt::Key_Escape, this, SLOT(close()));
+}
+
+void PinWidget::wheelEvent(QWheelEvent *e) {
+    int val = e->delta() > 0 ? 5 : -5;
+    int newWidth = qBound(50, m_label->width() + val, maximumWidth());
+    int newHeight = qBound(50, m_label->height() + val, maximumHeight());
+
+    QSize size(newWidth, newHeight);
+    setScaledPixmap(size);
+    adjustSize();
+
+    e->accept();
+}
+
+void PinWidget::mouseDoubleClickEvent(QMouseEvent *) {
+    close();
+}
+
+void PinWidget::mousePressEvent(QMouseEvent *e) {
+    m_dragStart = e->globalPos();
+    m_offsetX =  e->localPos().x() / width();
+    m_offsetY = e->localPos().y() / height();
+}
+
+void PinWidget::mouseMoveEvent(QMouseEvent *e) {
+    const QPoint delta = e->globalPos() - m_dragStart;
+    int offsetW = width() * m_offsetX;
+    int offsetH = height() * m_offsetY;
+    move(m_dragStart.x() + delta.x() - offsetW, m_dragStart.y() + delta.y() - offsetH);
+}
+
+void PinWidget::setScaledPixmap(const QSize &size) {
+    const qreal scale = qApp->devicePixelRatio();
+    QPixmap scaledPixmap = m_pixmap.scaled(size * scale, Qt::KeepAspectRatio,
+                                           Qt::SmoothTransformation);
+    scaledPixmap.setDevicePixelRatio(scale);
+    m_label->setPixmap(scaledPixmap);
+}