From 05c4be184f1f27bea15ee14c46d3fae863c5f422 Mon Sep 17 00:00:00 2001
From: Uwe Rathmann <Uwe.Rathmann@tigertal.de>
Date: Wed, 22 Jul 2020 11:49:28 +0200
Subject: [PATCH] using intervals

---
 src/controls/QskRangeControl.cpp | 41 ++++++++++++++++++++++++++++++++
 src/controls/QskRangeControl.h   |  6 +++++
 2 files changed, 47 insertions(+)

diff --git a/src/controls/QskRangeControl.cpp b/src/controls/QskRangeControl.cpp
index 43f65269..5e75140f 100644
--- a/src/controls/QskRangeControl.cpp
+++ b/src/controls/QskRangeControl.cpp
@@ -5,6 +5,7 @@
 
 #include "QskRangeControl.h"
 #include "QskFunctions.h"
+#include "QskIntervalF.h"
 
 QSK_SYSTEM_STATE( QskRangeControl, ReadOnly, ( QskAspect::FirstSystemState << 1 ) )
 
@@ -92,6 +93,46 @@ qreal QskRangeControl::maximum() const
     return m_data->maximum;
 }
 
+void QskRangeControl::setInterval( qreal min, qreal max )
+{
+    if ( max < min )
+        max = min;
+
+    if ( min == m_data->minimum && max == m_data->maximum )
+        return;
+
+    const auto oldMin = m_data->minimum;
+    const auto oldMax = m_data->maximum;
+
+    m_data->minimum = min;
+    m_data->maximum = max;
+
+    if ( isComponentComplete() )
+        adjustRangeAndValue( false );
+
+    if ( m_data->minimum != oldMin )
+        Q_EMIT minimumChanged( m_data->minimum );
+
+    if ( m_data->maximum != oldMax )
+        Q_EMIT maximumChanged( m_data->maximum );
+
+    const auto newRange = range();
+    if ( newRange != oldMax - oldMin )
+        Q_EMIT rangeChanged( newRange );
+
+    update();
+}
+
+void QskRangeControl::setInterval( const QskIntervalF& interval )
+{
+    setInterval( interval.lowerBound(), interval.upperBound() );
+}
+
+QskIntervalF QskRangeControl::interval() const
+{
+    return QskIntervalF( m_data->minimum, m_data->maximum );
+}
+
 void QskRangeControl::adjustRangeAndValue( bool increasing )
 {
     if ( m_data->maximum < m_data->minimum )
diff --git a/src/controls/QskRangeControl.h b/src/controls/QskRangeControl.h
index 72f9f2dc..fad38f6c 100644
--- a/src/controls/QskRangeControl.h
+++ b/src/controls/QskRangeControl.h
@@ -8,6 +8,8 @@
 
 #include "QskControl.h"
 
+class QskIntervalF;
+
 class QSK_EXPORT QskRangeControl : public QskControl
 {
     Q_OBJECT
@@ -36,6 +38,9 @@ class QSK_EXPORT QskRangeControl : public QskControl
     qreal minimum() const;
     qreal maximum() const;
 
+    void setInterval( qreal min, qreal max );
+    QskIntervalF interval() const;
+
     qreal range() const;
     qreal position() const;
 
@@ -54,6 +59,7 @@ class QSK_EXPORT QskRangeControl : public QskControl
     void setValue( qreal );
     void setMinimum( qreal );
     void setMaximum( qreal );
+    void setInterval( const QskIntervalF& );
     void setStepSize( qreal );
     void setPageSize( int );