Added QChart::zoomReset() and QChart::isZoomed()

QChart::zoomReset() will restore all series domains
to whatever they were before first zoom operation was called.

QChart::isZoomed() indicates if any zoom operations have been
called since chart creation or previous zoom reset.

Also fixed related QChartView right mouse button release docs.

Task-number: QTRD-1944
Change-Id: I5eec2352a2aa6d1b8ed7e6c97653bb327fb92cd3
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

1 files changed, 29 insertions, 1 deletions

diff --git a/src/domain/abstractdomain.cpp b/src/domain/abstractdomain.cpp
index 277472d1..f5ec9f47 100644
--- a/src/domain/abstractdomain.cpp
+++ b/src/domain/abstractdomain.cpp
@@ -30,7 +30,13 @@ AbstractDomain::AbstractDomain(QObject *parent)
       m_maxX(0),
       m_minY(0),
       m_maxY(0),
-      m_signalsBlocked(false)
+      m_signalsBlocked(false),
+      m_zoomed(false),
+      m_zoomResetMinX(0),
+      m_zoomResetMaxX(0),
+      m_zoomResetMinY(0),
+      m_zoomResetMaxY(0)
+
 {
 }
 
@@ -131,6 +137,28 @@ void AbstractDomain::blockRangeSignals(bool block)
     }
 }
 
+void AbstractDomain::zoomReset()
+{
+    if (m_zoomed) {
+        setRange(m_zoomResetMinX,
+                 m_zoomResetMaxX,
+                 m_zoomResetMinY,
+                 m_zoomResetMaxY);
+        m_zoomed = false;
+    }
+}
+
+void AbstractDomain::storeZoomReset()
+{
+    if (!m_zoomed) {
+        m_zoomed = true;
+        m_zoomResetMinX = m_minX;
+        m_zoomResetMaxX = m_maxX;
+        m_zoomResetMinY = m_minY;
+        m_zoomResetMaxY = m_maxY;
+    }
+}
+
 //algorithm defined by Paul S.Heckbert GraphicalGems I
 
 void AbstractDomain::looseNiceNumbers(qreal &min, qreal &max, int &ticksCount)