units.longDuration and units.shortDuration properties

These centralize the duration of animations, currently set to 250 and 50
milliseconds. They're notifiable since we want to be able to switch off
animations at runtime.

CCMAIL:plasma-devel@kde.org

src/declarativeimports/core/units.cpp

@@ -33,7 +33,8 @@
 Units::Units (QObject *parent)
     : QObject(parent),
       m_gridUnit(-1),
-      m_devicePixelRatio(-1)
+      m_devicePixelRatio(-1),
+      m_longDuration(250)
 {
     m_iconSizes = new QQmlPropertyMap(this);
     updateDevicePixelRatio();
@@ -163,6 +164,17 @@ void Units::updateSpacing()
     }
 }
 
+
+int Units::longDuration() const
+{
+    return m_longDuration;
+}
+
+int Units::shortDuration() const
+{
+    return m_longDuration / 5;
+}
+
 bool Units::eventFilter(QObject *watched, QEvent *event)
 {
     if (watched == QCoreApplication::instance()) {

src/declarativeimports/core/units.h

@@ -83,6 +83,18 @@ class Units : public QObject
      */
     Q_PROPERTY(qreal devicePixelRatio READ devicePixelRatio NOTIFY devicePixelRatioChanged)
 
+    /**
+     * units.longDuration should be used for longer, screen-covering animations, for opening and
+     * closing of dialogs and other "not too small" animations
+     */
+    Q_PROPERTY(int longDuration READ longDuration NOTIFY durationChanged)
+
+    /**
+     * units.longDuration should be used for short animations, such as accentuating a UI event,
+     * hover events, etc..
+     */
+    Q_PROPERTY(int shortDuration READ shortDuration NOTIFY durationChanged)
+
 public:
     Units(QObject *parent = 0);
     ~Units();
@@ -116,11 +128,24 @@ public:
      */
     int largeSpacing() const;
 
+    /**
+     * @return Duration for long animations, in milliseconds.
+     * @since 5.0
+     */
+    int longDuration() const;
+
+    /**
+     * @return Duration for short animations, in milliseconds.
+     * @since 5.0
+     */
+    int shortDuration() const;
+
 Q_SIGNALS:
     void devicePixelRatioChanged();
     void gridUnitChanged();
     void iconSizesChanged();
     void spacingChanged();
+    void durationChanged();
 
 private Q_SLOTS:
     void themeChanged();
@@ -144,6 +169,8 @@ private:
 
     int m_smallSpacing;
     int m_largeSpacing;
+
+    int m_longDuration;
 };
 
 #endif //UNITS_H

src/declarativeimports/plasmaextracomponents/qml/animations/Animations.js

@@ -2,7 +2,7 @@
 .pragma library
 
 // a normal animation
-var normalDuration = 250;
+var normalDuration = units.longDuration;
 
 // for direct feedback, such as tapping
-var feedbackDuration = 50;
+var feedbackDuration = units.shortDuration;