Merge pull request #9 from ismailof/latitude_rotation

Latitude rotation

package/contents/config/main.xml

@@ -6,8 +6,11 @@
   <kcfgfile name=""/>
 
   <group name="General">
-    <entry name="hemisphere" type="int">
-      <default>0</default>
+    <entry name="latitude" type="int">
+      <default>90</default>
+    </entry>
+    <entry name="latitudeAuto" type="Bool">
+      <default>false</default>
     </entry>
     <entry name="showBackground" type="Bool">
       <default>false</default>

package/contents/ui/ImageChoices.qml

@@ -17,7 +17,7 @@
 
 import QtQuick 2.1 as QtQuick
 
-/*
+/*lunarIndex
 Defines the list of images of the moon.
   key - was a string name to be be shown in a ComboBox - not used
   value - not used because elsewhere just uses the index into this model

package/contents/ui/LunaIcon.qml

@@ -29,7 +29,7 @@ Item {
     id: lunaIcon
 
     property int phaseNumber: 0
-    property int hemisphere: 0
+    property int latitude: 90  //Degrees: 0=Equator, 90=North Pole, -90=South Pole
     property bool showShadow: true
     property bool transparentShadow: true
 
@@ -51,6 +51,7 @@ Item {
 
     PlasmaCore.SvgItem {
         id: lunaSvgItem
+        visible: false 
 
         anchors.centerIn: parent
         width: Math.min(parent.width, parent.height)
@@ -58,19 +59,19 @@ Item {
 
         svg: lunaSvg
 
-        // deal with northern <-> southern hemisphere
+        // Rotation to compensate the moon's image basic position to a north pole view
+        // FIXME: Somehow it does not work when applied to OpacityMask or Blend
         transformOrigin: Item.Center
-        rotation: (hemisphere == 0 ? 0 : 180) - lunarImageTweak
-        visible: !transparentShadow
+        rotation: -lunarImageTweak  
     }
 
     Canvas {
         id: shadow
         width: lunaSvgItem.width
         height: lunaSvgItem.height
-        visible: !transparentShadow
+        visible: false
 
-        property int hemisphere: lunaIcon.hemisphere
+        property int latitude: lunaIcon.latitude
         property int theta: lunaIcon.theta
         property bool showShadow: lunaIcon.showShadow
         property string lunarImage: lunaIcon.lunarImage
@@ -82,7 +83,7 @@ Item {
         anchors.centerIn: parent
         contextType: "2d"
 
-        onHemisphereChanged: requestPaint()
+        onLatitudeChanged: requestPaint()
 
         onThetaChanged: requestPaint()
 
@@ -149,8 +150,6 @@ Item {
             //console.log("radius: " + radius.toString())
 
             context.translate(radius,radius)
-            if (hemisphere>0)
-              context.rotate(Math.PI)
 
             // These two determine which side of the centre meridan to draw
             // the two arcs enclosing the shadow area.
@@ -196,11 +195,23 @@ Item {
         }
     }
 
+    // Shadow acts as a transparecy mask
     OpacityMask {
         anchors.fill: lunaSvgItem
         source: lunaSvgItem
         maskSource: shadow
         invert: true
+        rotation: latitude - 90
         visible: transparentShadow
     }
+
+    // Shadow is printed on top of the moon image
+    Blend {
+        anchors.fill: lunaSvgItem
+        source: lunaSvgItem
+        foregroundSource: shadow
+        rotation: latitude - 90
+        mode: "normal"
+        visible: !transparentShadow
+    }
 }

package/contents/ui/configGeneral.qml

@@ -21,11 +21,14 @@ import QtQuick.Layouts 1.2 as QtLayouts
 import QtQuick.Dialogs 1.0 as QtDialogs
 
 import org.kde.plasma.components 2.0 as PlasmaComponents
+import org.kde.plasma.core 2.0 as PlasmaCore
+
 
 Item {
     id: generalPage
 
-    property alias cfg_hemisphere: hemisphere.currentIndex  // 0=North 1=South
+    property alias cfg_latitudeAuto: latitudeAuto.checked  // 0=Equator, +90=North Pole, -90=South Pole
+    property alias cfg_latitude: latitude.value  // 0=Equator, +90=North Pole, -90=South Pole
     property alias cfg_transparentShadow: transparentShadow.checked  // boolean
     property alias cfg_showBackground: showBackground.checked  // boolean
     property alias cfg_dateFormat: dateFormat.currentIndex // code: 0= 1= 2=...
@@ -43,12 +46,32 @@ Item {
     onCfg_lunarIndexChanged: {
         cfg_lunarImage = imageChoices.get(cfg_lunarIndex).filename
         cfg_lunarImageTweak = imageChoices.get(cfg_lunarIndex).tweak
+        if (cfg_lunarImage == '') {
+            cfg_transparentShadow = false  //transparentShadow does not work with diskColour
+        }
+    }
+
+    onCfg_latitudeAutoChanged: {
+        if (cfg_latitudeAuto) {
+            cfg_latitude = geoSource.data.location.latitude
+        }
     }
 
     ImageChoices {
         id: imageChoices
     }
 
+    PlasmaCore.DataSource {
+        id: geoSource
+        engine: "geolocation"
+        connectedSources: ["location"]
+        interval: 3600 * 1000
+
+        onNewData:{
+            lbl_place.text = i18n(geoSource.data.location.country)
+        }
+    }
+
     QtDialogs.ColorDialog {
         id: colorDialog
         title: i18n("Pick a colour for the moon")
@@ -82,7 +105,7 @@ Item {
               id: lunaPreview
               width: 200
               height: 200
-              hemisphere: cfg_hemisphere
+              latitude: cfg_latitude
               showShadow: false
               transparentShadow: false
               lunarImage: cfg_lunarImage
@@ -146,18 +169,41 @@ Item {
         }
 
         QtControls.Label {
-            text: i18n("Hemisphere")
+            text: i18n("Latitude")
         }
-        QtControls.ComboBox {
-            id: hemisphere
+        QtLayouts.RowLayout {
+            spacing: 20
+
+            QtControls.Label {
+                id: lbl_latitude
+                text: Math.abs(latitude.value) + "º " + (latitude.value < 0 ? "S" : "N")
+                QtLayouts.Layout.preferredWidth: 40
+                horizontalAlignment: Text.AlignRight
+            }
+
+            QtControls.Slider {
+                id: latitude
                 QtLayouts.Layout.fillWidth: true
-            textRole: "key"
-            model: ListModel {
-                dynamicRoles: true
-                Component.onCompleted: {
-                append({key : i18n("Northern"), value: 0 })
-                append({key : i18n("Southern"), value: 1 })
+                minimumValue: -90.0
+                maximumValue: 90.0
+                stepSize: 5.0
+                tickmarksEnabled: true
+                enabled: !cfg_latitudeAuto
+            }
+        }
+        QtControls.Label {
+            text: i18n("")
         }
+        QtLayouts.RowLayout {
+            spacing: 20
+            QtControls.CheckBox {
+                id: latitudeAuto
+                text: i18n("Use current latitude")
+            }
+            QtControls.Label {
+                id: lbl_place
+                QtLayouts.Layout.fillWidth: true
+                horizontalAlignment: Text.AlignRight
             }
         }
 
@@ -202,6 +248,7 @@ Item {
         QtControls.CheckBox {
             id: transparentShadow
             text: i18n("Transparent shadow")
+            enabled: cfg_lunarImage != ""
         }
     }
 }

package/contents/ui/main.qml

@@ -40,7 +40,7 @@ Item {
 
     property bool showBackground: Plasmoid.configuration.showBackground
     property bool transparentShadow: Plasmoid.configuration.transparentShadow
-    property int hemisphere: Plasmoid.configuration.hemisphere
+    property int latitude: Plasmoid.configuration.latitude
     property int dateFormat: Plasmoid.configuration.dateFormat
     property string dateFormatString: Plasmoid.configuration.dateFormatString
 
@@ -59,13 +59,13 @@ Item {
     Plasmoid.compactRepresentation: Item {
         id: compact
 
-        property int hemisphere: main.hemisphere
+        property int latitude: main.latitude
         property bool showBackground: main.showBackground
         property int lunarIndex: main.lunarIndex
 
         Component.onCompleted: updateDetails()
 
-        onHemisphereChanged: updateDetails()
+        onLatitudeChanged: updateDetails()
 
         onLunarIndexChanged: updateDetails()
 
@@ -74,7 +74,7 @@ Item {
             currentPhase = LunaCalc.getCurrentPhase(true);
             lunaIcon.phaseNumber = 13; //currentPhase.number;
             lunaIcon.theta = currentPhase.terminator;
-            lunaIcon.hemisphere = hemisphere;
+            lunaIcon.latitude = latitude;
 
             main.lunarImage = imageChoices.get(main.lunarIndex).filename
             main.lunarImageTweak = imageChoices.get(main.lunarIndex).tweak
@@ -94,7 +94,7 @@ Item {
 
         LunaIcon {
             id: lunaIcon
-            hemisphere: hemisphere
+            latitude: main.latitude
             lunarImage: main.lunarImage
             lunarImageTweak: main.lunarImageTweak
             transparentShadow: main.transparentShadow