From c4c7e7a7f4d462490e8f0fea846f13bff6076845 Mon Sep 17 00:00:00 2001
From: Tomaz Canabrava <tomaz.canabrava@intel.com>
Date: Mon, 21 Sep 2015 16:08:58 -0300
Subject: [PATCH] Display the popup in the correct place

The popup should be shown beneath the QLineEdit. this code here
is shamelessy stolen from the QCompleter source code because I
really didn't want to rethink the correct way of doing this.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
---
 qt-ui/locationinformation.cpp | 56 +++++++++++++++++++++++++++++++----
 qt-ui/locationinformation.h   |  3 ++
 2 files changed, 54 insertions(+), 5 deletions(-)

diff --git a/qt-ui/locationinformation.cpp b/qt-ui/locationinformation.cpp
index 087e31fc9..27cbc61a3 100644
--- a/qt-ui/locationinformation.cpp
+++ b/qt-ui/locationinformation.cpp
@@ -14,6 +14,8 @@
 #include <QItemSelectionModel>
 #include <qmessagebox.h>
 #include <cstdlib>
+#include <QDesktopWidget>
+#include <QScrollBar>
 
 LocationInformationWidget::LocationInformationWidget(QWidget *parent) : QGroupBox(parent), modified(false)
 {
@@ -421,11 +423,6 @@ DiveLocationLineEdit::DiveLocationLineEdit(QWidget *parent)
 	view->setModelColumn(DiveLocationModel::NAME);
 	view->setItemDelegate(new LocationFilterDelegate());
 	connect(this, &QLineEdit::textEdited, this, &DiveLocationLineEdit::setTemporaryDiveSiteName);
-
-	//HACK:
-	/* This is being show currently just to test. */
-	qDebug() << model->rowCount() << model->columnCount();
-	view->show();
 }
 
 void DiveLocationLineEdit::refreshDiveSiteCache()
@@ -463,6 +460,55 @@ void DiveLocationLineEdit::setTemporaryDiveSiteName(const QString& s)
 	proxy->invalidate();
 }
 
+void DiveLocationLineEdit::keyPressEvent(QKeyEvent *ev)
+{
+	QLineEdit::keyPressEvent(ev);
+	if(ev->key() != Qt::Key_Left && ev->key() != Qt::Key_Right && !view->isVisible()) {
+		qDebug() << "Showing popup";
+		showPopup();
+	} else {
+		qDebug() << "Not showing popup";
+	}
+}
+
+void DiveLocationLineEdit::showPopup()
+{
+		const QRect screen = QApplication::desktop()->availableGeometry(this);
+		const int maxVisibleItems = 5;
+		Qt::LayoutDirection dir = layoutDirection();
+		QPoint pos;
+		int rh, w;
+		int h = (view->sizeHintForRow(0) * qMin(maxVisibleItems, view->model()->rowCount()) + 3) + 3;
+		QScrollBar *hsb = view->horizontalScrollBar();
+		if (hsb && hsb->isVisible())
+			h += view->horizontalScrollBar()->sizeHint().height();
+
+		rh = height();
+		pos = mapToGlobal(QPoint(0, height() - 2));
+		w = width();
+
+		if (w > screen.width())
+			w = screen.width();
+		if ((pos.x() + w) > (screen.x() + screen.width()))
+			pos.setX(screen.x() + screen.width() - w);
+		if (pos.x() < screen.x())
+			pos.setX(screen.x());
+
+		int top = pos.y() - rh - screen.top() + 2;
+		int bottom = screen.bottom() - pos.y();
+		h = qMax(h, view->minimumHeight());
+		if (h > bottom) {
+			h = qMin(qMax(top, bottom), h);
+			if (top > bottom)
+				pos.setY(pos.y() - h - rh + 2);
+		}
+
+		view->setGeometry(pos.x(), pos.y(), w, h);
+
+		if (!view->isVisible())
+				view->show();
+}
+
 DiveLocationListView::DiveLocationListView(QWidget *parent)
 {
 
diff --git a/qt-ui/locationinformation.h b/qt-ui/locationinformation.h
index 16d5a3eae..b60c50606 100644
--- a/qt-ui/locationinformation.h
+++ b/qt-ui/locationinformation.h
@@ -93,6 +93,9 @@ public:
 	DiveLocationLineEdit(QWidget *parent =0 );
 	void refreshDiveSiteCache();
 	void setTemporaryDiveSiteName(const QString& s);
+protected:
+	void keyPressEvent(QKeyEvent *ev);
+	void showPopup();
 private:
 	DiveLocationFilterProxyModel *proxy;
 	DiveLocationModel *model;