Fixed style for API < 21

Author: maltaisn

CHANGELOG.md

@@ -1,22 +1,23 @@
 # v2.0.0
 - Changed package name to `com.maltaisn.calcdialoglib`.
 - To change the dialog settings, `CalcDialog.getSettings()` must now be used.
+- Order of operations is now applied by default. This can be changed with `setOrderOfOperationsApplied(Boolean)`.
 - Added a setting to show the typed expression (`setExpressionShown(Boolean)`), which can also be edited (`setExpressionEditable(Boolean)`).
 - Added a setting for choosing the numpad layout: like a phone (top row 123) or a calculator (top row 789).
 - Added a min value setting separate from max value. As a consequence, `setSignCanBeChanged` setting was removed, use a minimum or maximum of 0 instead. If the minimum or the maximum is 0, special error messages like "Result must be positive" will still be shown.
 - Added `calcHeaderElevation`, `calcHeaderStyle`, `calcExpressionStyle` and `calcExpressionScrollViewStyle` style attributes.
 - Added getters to `CalcSettings` for Kotlin property syntax.
-- Order of operations is now applied by default. This can be changed with `setOrderOfOperationsApplied(Boolean)`.
+- Added a `calcHeaderElevationDrawable` attribute, needed to customize the header before API 21.
 - Changed `setValue(BigDecimal)` to `setInitialValue(BigDecimal)`.
 - Changed `setClearOnOperation(Boolean)` to `setShouldEvaluateOnOperation(Boolean)`.
 - Changed `setShowZeroWhenNoValue(Boolean)` to `setZeroShownWhenNoValue(Boolean)`.
 - Changed minus sign from hyphen `-` to unicode symbol `−`.
 - Changed "Out of bounds" error behavior, now only shown when OK is pressed.
 - Changed default maximum dialog height from 400dp to 500dp.
 - Replaced all formatting settings with NumberFormat:
-    - `setMaximumIntegerDigits`: maximum integer digits than can be typed.
-    - `setMaximumFractionDigits`: maximum fraction digits than can be typed.
-    - `setDecimalFormatSymbolds`: change decimal separator, negative sign, grouping symbol, etc.
+    - `setMaximumIntegerDigits`: maximum integer digits than can be typed, but more could be displayed.
+    - `setMaximumFractionDigits`: maximum fraction digits than can be typed and displayed.
+    - `setDecimalFormatSymbols`: change decimal separator, negative sign, grouping symbol, etc.
     - `setGroupingUsed`: enable or disable grouping.
     - `setRoundingMode`: change the rounding mode, also used for division by the calculator.
     - More settings available like prefix, suffix and minimum digits.

calcdialog/src/main/res/drawable/calc_bg_elevation.xml

@@ -12,17 +12,14 @@
     </item>
 
     <item
+        android:bottom="2dp"
         android:left="0dp"
         android:right="0dp"
         android:top="0dp"
-        android:bottom="?attr/calcHeaderElevation"
         tools:bottom="2dp"
         >
         <shape android:shape="rectangle">
-            <solid
-                android:color="?attr/colorBackgroundFloating"
-                tools:color="#ffffff"
-                />
+            <solid android:color="#ffffff"/>
         </shape>
     </item>
 </layer-list>

calcdialog/src/main/res/values/attrs.xml

@@ -12,15 +12,12 @@
         <attr name="calcButtonTextOk" format="string"/>
         <attr name="calcButtonTexts" format="reference"/>
         <attr name="calcBackgroundColor" format="color|reference"/>
-        <attr name="calcHeaderStyle"
-              format="reference"/>
-        <attr name="calcHeaderElevation"
-              format="dimension|reference"/>
+        <attr name="calcHeaderStyle" format="reference"/>
+        <attr name="calcHeaderElevation" format="dimension|reference"/>
+        <attr name="calcHeaderElevationDrawable" format="reference"/>
         <attr name="calcValueStyle" format="reference"/>
-        <attr name="calcExpressionScrollViewStyle"
-              format="reference"/>
-        <attr name="calcExpressionStyle"
-              format="reference"/>
+        <attr name="calcExpressionScrollViewStyle" format="reference"/>
+        <attr name="calcExpressionStyle" format="reference"/>
         <attr name="calcNumberBtnStyle" format="reference"/>
         <attr name="calcNumberBtnColor" format="color|reference"/>
         <attr name="calcOperationBtnStyle" format="reference"/>

calcdialog/src/main/res/values/styles.xml

@@ -13,6 +13,7 @@
         <item name="calcBackgroundColor">?attr/colorBackgroundFloating</item>
         <item name="calcHeaderStyle">@style/CalcHeaderStyle</item>
         <item name="calcHeaderElevation">2dp</item>
+        <item name="calcHeaderElevationDrawable">@drawable/calc_bg_elevation</item>
         <item name="calcValueStyle">@style/CalcValueStyle</item>
         <item name="calcExpressionScrollViewStyle">@style/CalcExpressionScrollViewStyle</item>
         <item name="calcExpressionStyle">@style/CalcExpressionStyle</item>
@@ -29,7 +30,7 @@
 
     <public name="CalcHeaderStyle" type="style"/>
     <style name="CalcHeaderStyle">
-        <item name="android:background">@drawable/calc_bg_elevation</item>
+        <item name="android:background">?attr/calcHeaderElevationDrawable</item>
     </style>
 
     <public name="CalcValueStyle" type="style"/>