From 6e304cd0d42bca2bf66037e9f2be4dfee8ea9dc8 Mon Sep 17 00:00:00 2001
From: Mark Liversedge <liversedge@gmail.com>
Date: Sun, 1 Dec 2013 10:28:27 +0000
Subject: [PATCH] Compare Pane Mechanics

.. compare pane now appears and disappears on both
   the analysis view and home view

.. it also is notified of drag/drop events and can
   accept the objects dropped

.. it is now time to write the widget for collecting
   and managing compare sets
---
 src/ComparePane.cpp | 36 ++++++++++++++++++++++++++++++++++++
 src/ComparePane.h   |  3 +++
 src/TabView.cpp     |  5 ++++-
 src/Views.cpp       |  4 ++--
 4 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/src/ComparePane.cpp b/src/ComparePane.cpp
index c561fd30a..5db63f31d 100644
--- a/src/ComparePane.cpp
+++ b/src/ComparePane.cpp
@@ -20,4 +20,40 @@
 
 ComparePane::ComparePane(QWidget *parent, CompareMode mode) : mode_(mode), QWidget(parent)
 {
+    QVBoxLayout *layout = new QVBoxLayout(this);
+
+    setAcceptDrops(true);
+    setAutoFillBackground(true);
+    QPalette pal;
+    pal.setBrush(QPalette::Active, QPalette::Window, Qt::white);
+    pal.setBrush(QPalette::Inactive, QPalette::Window, Qt::white);
+    setPalette(pal);
+#if 0
+    // just add a label for now
+    QLabel *filler = new QLabel(tr("Drag and drop here..."), this);
+    filler->setPalette(pal);
+    layout->addWidget(filler);
+#endif
+}
+
+
+void 
+ComparePane::dragEnterEvent(QDragEnterEvent *event)
+{
+    if (event->mimeData()->formats().contains("application/x-qabstractitemmodeldatalist")) {
+        qDebug()<<"compare pane: enter event";
+        event->acceptProposedAction();
+    }
+}
+
+void 
+ComparePane::dragLeaveEvent(QDragLeaveEvent *event)
+{
+    qDebug()<<"compare pane: leave event";
+}
+
+void
+ComparePane::dropEvent(QDropEvent *)
+{
+    qDebug()<<"compare pane: drop event";
 }
diff --git a/src/ComparePane.h b/src/ComparePane.h
index e7b27ceda..adc7046b6 100644
--- a/src/ComparePane.h
+++ b/src/ComparePane.h
@@ -33,6 +33,9 @@ class ComparePane : public QWidget
         ComparePane(QWidget *parent, CompareMode mode=interval);
 
     protected:
+        void dragEnterEvent(QDragEnterEvent*);
+        void dragLeaveEvent(QDragLeaveEvent*);
+        void dropEvent(QDropEvent *);
 
     signals:
 
diff --git a/src/TabView.cpp b/src/TabView.cpp
index 761c68e7e..be666e021 100644
--- a/src/TabView.cpp
+++ b/src/TabView.cpp
@@ -58,7 +58,10 @@ TabView::TabView(Context *context, int type) :
     splitter->setOpaqueResize(true); // redraw when released, snappier UI
     stack->insertWidget(0, splitter); // splitter always at index 0
 
-    mainSplitter = new ViewSplitter(Qt::Vertical, "Compare Intervals", this);
+    QString heading = "Compare Intervals";
+    if (type == VIEW_HOME) heading = "Compare Date Ranges";
+
+    mainSplitter = new ViewSplitter(Qt::Vertical, heading, this);
     mainSplitter->setHandleWidth(23);
     mainSplitter->setFrameStyle(QFrame::NoFrame);
     mainSplitter->setContentsMargins(0, 0, 0, 0); // attempting to follow some UI guides
diff --git a/src/Views.cpp b/src/Views.cpp
index b4abcb29f..52b0f3408 100644
--- a/src/Views.cpp
+++ b/src/Views.cpp
@@ -36,8 +36,7 @@ AnalysisView::AnalysisView(Context *context, QStackedWidget *controls) : TabView
     setSidebar(s);
     setPage(a);
     setBlank(b);
-    //setBottom(new ComparePane(this, ComparePane::interval));
-    setBottom(new QWidget(this));
+    setBottom(new ComparePane(this, ComparePane::interval));
 }
 
 AnalysisView::~AnalysisView()
@@ -120,6 +119,7 @@ HomeView::HomeView(Context *context, QStackedWidget *controls) : TabView(context
     setSidebar(s);
     setPage(h);
     setBlank(b);
+    setBottom(new ComparePane(this, ComparePane::season));
 
     connect(s, SIGNAL(dateRangeChanged(DateRange)), this, SLOT(dateRangeChanged(DateRange)));
     connect(this, SIGNAL(onSelectionChanged()), this, SLOT(justSelected()));