Initial commit

Lts/Common/LtsWidgets/lts_frameless_dialog.cpp

@@ -0,0 +1,160 @@
+/**
+* @RDE_HEADER@
+* FrameLess Dialog with alternatie basecolor
+* $Id$
+* $HeadURL$
+* $Author$
+*
+* Created by Mike Wille, SLSE, 2016-03-09
+*/
+
+#include "lts_frameless_dialog.h"
+
+#include <QApplication>
+#include <QRect>
+#include <QStyle>
+#include <QSize>
+#include <QScreen>
+#include <QScroller>
+#include <QScrollArea>
+#include <QDesktopWidget>
+#include <QShowEvent>
+#include <QTimer>
+
+
+namespace LtsWidgets
+{
+LtsFramelessDialog::LtsFramelessDialog(QWidget *parent, const Behaviour &behaviour)
+  : QDialog(parent)
+{
+  // Qt-Bug? Qt::FramelessWindowHint in the underlying windows results in
+  // mapToGlobal(QPoint(0,0)) == QPoint(0,0) when a popup window is show on top of it
+  Qt::WindowFlags wf; // TODO: FIX WM AFTER FAT!! = Qt::FramelessWindowHint; // make frameless, composite manager drops the shadow
+  // frameless dialogs cannot have (completety working) children dialogs => frames 4 fat
+
+  switch (behaviour)
+  {
+    case Behaviour::Modal:
+    {
+
+#ifndef TABLET_MODE
+      setModal(true);
+      wf |= Qt::Dialog;
+#else
+      wf |= Qt::Window;
+#endif
+      wf |= Qt::WindowStaysOnTopHint;
+      break;
+    }
+
+    case Behaviour::Popup:
+      wf |= Qt::Popup;
+      break;
+  }
+
+  setWindowFlags(wf);
+
+
+  QTimer *t = new QTimer(this);
+  t->setInterval(250);
+  connect(t, &QTimer::timeout,
+          this, [this]()
+  {
+    //qWarning() << "my pos" << QCursor::pos();
+    //qWarning() << "my screen rect" << screenRectFromPoint(QCursor::pos());
+
+    QSize s = size();
+    setGeometry(QStyle::alignedRect(Qt::LeftToRight, Qt::AlignCenter, s, screenRectFromPoint(QCursor::pos())));
+  });
+  //t->start();    TODO: impl this!
+}
+
+
+LtsFramelessDialog::~LtsFramelessDialog()
+{
+
+}
+
+
+QRect LtsFramelessDialog::screenRectFromPoint(const QPoint &pos) const
+{
+  const auto screens = QGuiApplication::screens();
+  for (QScreen *screen : screens)
+  {
+    QRect s = screen->geometry().adjusted(-50, -50, 50, 50); // graceful offset for desktop managers
+
+    bool contains = s.contains(pos);
+
+    //qWarning() << "screen" << s << "   widget" << w << "   contains?" << contains;
+    //qWarning() << "screen: x" << s.x() << "y" << s.y() << "h" << s.height() << "w" << s.width();
+    //qWarning() << "widget: x" << w.x() << "y" << w.y() << "h" << w.height() << "w" << w.width();
+
+    if (contains)
+      return screen->geometry();
+  }
+
+  return QRect();
+}
+
+
+void LtsFramelessDialog::showEvent(QShowEvent *event)
+{
+  QDialog::showEvent(event);
+  QTimer::singleShot(0, this, &LtsFramelessDialog::onUpdateGeometry);
+
+
+#ifdef TABLET_MODE
+  QList<QWidget *> scrollWidgets = findChildren<QWidget *>();
+
+  for (auto i = scrollWidgets.begin(); i != scrollWidgets.end(); ++i)
+  {
+    QWidget *widget = *i;
+
+    QVariant isConst = widget->property("const");
+    if (isConst.isValid() && isConst.toBool())
+      continue;
+
+    addTouchScroll(widget);
+  }
+#endif
+}
+
+
+void LtsFramelessDialog::addTouchScroll(QWidget *widget)
+{
+  if (!widget)
+    return;
+  widget->setAttribute(Qt::WA_AcceptTouchEvents);
+
+  QScrollArea *sca = qobject_cast<QScrollArea *>(widget);
+  if (sca)
+  {
+    QScroller::grabGesture(sca->viewport(), QScroller::LeftMouseButtonGesture);
+    return;
+  }
+}
+
+
+void LtsFramelessDialog::onUpdateGeometry()
+{
+  QRect r;
+  QWidget *p = parentWidget();
+
+  if (p) // get the parent's window and center the dialog on the center of the parent's window
+  {
+    QWidget *window = p->window();
+    QPoint global = window->mapToGlobal(QPoint(0,0));
+    QSize size = window->size();
+
+    r = QRect(global, size);
+  }
+  else // no parent - no alignment!
+  {
+    r = QGuiApplication::primaryScreen()->geometry();
+  }
+
+  QSize s = size();
+  setGeometry(QStyle::alignedRect(Qt::LeftToRight, Qt::AlignCenter, s, r));
+}
+
+} // namespace LtsWidgets