From c906965aa9d78a0f80ae34c467d7285eaa7db123 Mon Sep 17 00:00:00 2001
From: Matthias Puchner <github@mpuchner.de>
Date: Wed, 20 Oct 2021 22:06:01 +0200
Subject: [PATCH] introduce WidgetMoverButton (to realize the "move layer"
feature in the upcoming layer oriented sample editor)
---
.../SampleDesigner/WidgetMoverButton.cpp | 103 ++++++++++++++++++
GUI/Views/SampleDesigner/WidgetMoverButton.h | 62 +++++++++++
2 files changed, 165 insertions(+)
create mode 100644 GUI/Views/SampleDesigner/WidgetMoverButton.cpp
create mode 100644 GUI/Views/SampleDesigner/WidgetMoverButton.h
diff --git a/GUI/Views/SampleDesigner/WidgetMoverButton.cpp b/GUI/Views/SampleDesigner/WidgetMoverButton.cpp
new file mode 100644
index 00000000000..6a428f4b155
--- /dev/null
+++ b/GUI/Views/SampleDesigner/WidgetMoverButton.cpp
@@ -0,0 +1,103 @@
+// ************************************************************************************************
+//
+// BornAgain: simulate and fit reflection and scattering
+//
+//! @file GUI/Views/SampleDesigner/WidgetMoverButton.cpp
+//! @brief Implements class WidgetMoverButton
+//!
+//! @homepage http://www.bornagainproject.org
+//! @license GNU General Public License v3 or higher (see COPYING)
+//! @copyright Forschungszentrum Jülich GmbH 2021
+//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
+//
+// ************************************************************************************************
+
+#include "GUI/Views/SampleDesigner/WidgetMoverButton.h"
+#include <QLayout>
+#include <QMouseEvent>
+#include <QPropertyAnimation>
+
+WidgetMoverButton::WidgetMoverButton(QWidget* parent, QWidget* widgetToMove, int ignoreOnTop)
+ : QToolButton(parent), m_widgetToMove(widgetToMove), m_ignoreOnTop(ignoreOnTop)
+{
+ setIcon(QIcon(":/images/toolbar24dark_hambar.svg"));
+}
+
+void WidgetMoverButton::mousePressEvent(QMouseEvent* event)
+{
+ m_mouseDownY = event->globalY();
+}
+
+void WidgetMoverButton::mouseReleaseEvent(QMouseEvent* event)
+{
+ m_started = false;
+ if (m_layoutToDeactivate != nullptr) {
+ m_layoutToDeactivate->setEnabled(true);
+ m_layoutToDeactivate->update();
+ }
+ emit finishedMoving(m_widgetToMove, m_dropAboveThisWidget);
+}
+
+void WidgetMoverButton::mouseMoveEvent(QMouseEvent* event)
+{
+ int dy = event->globalY() - m_mouseDownY;
+ if (abs(dy) > 5 && !m_started) {
+ m_started = true;
+
+ m_layoutToDeactivate = m_widgetToMove->parentWidget()->layout();
+
+ m_yOfFirstRelevantWidget = m_layoutToDeactivate->itemAt(m_ignoreOnTop)->geometry().top();
+ m_layoutToDeactivate->setEnabled(false);
+ m_originalWidgetY = m_widgetToMove->y();
+ m_widgetToMove->raise();
+ emit startingToMove();
+ m_widgetToMove->move(m_widgetToMove->x() + 5, m_widgetToMove->y());
+ m_widgetToMove->resize(m_widgetToMove->width() - 10, m_widgetToMove->height());
+ }
+
+ if (m_started) {
+
+ // -- move the dragged widget to the new position
+ m_widgetToMove->move(m_widgetToMove->x(), m_originalWidgetY + dy);
+
+ // -- move other widgets to make room
+ m_dropAboveThisWidget = nullptr;
+ int yTopOfLayoutItem = m_yOfFirstRelevantWidget;
+
+ for (int i = m_ignoreOnTop; i < m_layoutToDeactivate->count(); ++i) {
+ auto* layoutItem = m_layoutToDeactivate->itemAt(i);
+ if (layoutItem->widget() == m_widgetToMove)
+ continue;
+
+ const bool movedWidgetIsAboveThisLayoutItem =
+ m_widgetToMove->y() < yTopOfLayoutItem + layoutItem->geometry().height() / 2;
+ if (movedWidgetIsAboveThisLayoutItem && layoutItem->widget() != nullptr
+ && m_dropAboveThisWidget == nullptr)
+ m_dropAboveThisWidget = layoutItem->widget();
+
+ QRect r = layoutItem->geometry();
+ if (movedWidgetIsAboveThisLayoutItem)
+ r.moveTop(yTopOfLayoutItem + m_widgetToMove->height()
+ + m_layoutToDeactivate->spacing());
+ else
+ r.moveTop(yTopOfLayoutItem);
+
+ if (r != layoutItem->geometry()) {
+ QWidget* w = layoutItem->widget();
+ if (w == nullptr) {
+ layoutItem->setGeometry(r);
+ } else {
+ QPropertyAnimation* animation = new QPropertyAnimation(w, "geometry");
+ animation->setDuration(100);
+ animation->setEasingCurve(QEasingCurve::OutQuad);
+ animation->setStartValue(w->geometry());
+ animation->setEndValue(r);
+
+ animation->start();
+ }
+ }
+
+ yTopOfLayoutItem += r.height() + m_layoutToDeactivate->spacing();
+ }
+ }
+}
diff --git a/GUI/Views/SampleDesigner/WidgetMoverButton.h b/GUI/Views/SampleDesigner/WidgetMoverButton.h
new file mode 100644
index 00000000000..1f0e29002c1
--- /dev/null
+++ b/GUI/Views/SampleDesigner/WidgetMoverButton.h
@@ -0,0 +1,62 @@
+// ************************************************************************************************
+//
+// BornAgain: simulate and fit reflection and scattering
+//
+//! @file GUI/Views/SampleDesigner/WidgetMoverButton.h
+//! @brief Defines class WidgetMoverButton
+//!
+//! @homepage http://www.bornagainproject.org
+//! @license GNU General Public License v3 or higher (see COPYING)
+//! @copyright Forschungszentrum Jülich GmbH 2021
+//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
+//
+// ************************************************************************************************
+
+#ifndef BORNAGAIN_GUI_VIEWS_SAMPLEDESIGNER_WIDGETMOVERBUTTON_H
+#define BORNAGAIN_GUI_VIEWS_SAMPLEDESIGNER_WIDGETMOVERBUTTON_H
+
+#include <QToolButton>
+
+//! Button to move a widget vertically in a layout.
+//!
+//! With this button, the "move layer" feature in the layer oriented sample editor is realized
+//! (it is the button on each LayerForm).
+//!
+//! When pressing the button, the parent layout of the widget is deactivated, and the widget is
+//! moved to the position where the pressed mouse cursor is moved.
+//! When the mouse is released, the layout is again activated and a signal finishedMoving() is
+//! emitted. Any reordering of the widgets in the layout then has to be handled outside - no
+//! reordering is done in here.
+class WidgetMoverButton : public QToolButton {
+ Q_OBJECT
+public:
+ //! Create a widget mover button.
+ //!
+ //! If the widget shall not be able to be dragged on the top position, this can be defined by
+ //! ignoreOnTop (the number of widgets at the top of the layout which shall not be affected by
+ //! the reordering). In the case of the layer moving, the topmost Form (the multilayer
+ //! properties) shall not be part of reordering.
+ WidgetMoverButton(QWidget* parent, QWidget* widgetToMove, int ignoreOnTop = 0);
+
+protected:
+ virtual void mousePressEvent(QMouseEvent* event) override;
+ virtual void mouseReleaseEvent(QMouseEvent* event) override;
+ virtual void mouseMoveEvent(QMouseEvent* event) override;
+
+signals:
+ void startingToMove();
+ void finishedMoving(QWidget* widgetToMove, QWidget* moveAboveThisWidget);
+
+private:
+ bool m_started = false;
+ int m_mouseDownY;
+ QLayout* m_layoutToDeactivate = nullptr;
+ QWidget* m_widgetToMove;
+ QWidget* m_dropAboveThisWidget;
+ int m_originalWidgetY;
+ int m_yOfFirstRelevantWidget;
+ int m_ignoreOnTop;
+};
+
+
+#endif // BORNAGAIN_GUI_VIEWS_SAMPLEDESIGNER_WIDGETMOVERBUTTON_H
--
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