cpp-143: Calculator text size dynamically in Bug Buttons layout

Fixes #143

android-app/src/main/java/org/solovyev/android/calculator/App.java

@@ -34,6 +34,7 @@ import android.util.Log;
 import org.solovyev.android.UiThreadExecutor;
 import org.solovyev.android.Views;
 import org.solovyev.android.calculator.ga.Ga;
+import org.solovyev.android.calculator.view.ScreenMetrics;
 import org.solovyev.android.checkout.*;
 import org.solovyev.android.view.VibratorContainer;
 import org.solovyev.common.listeners.JEvent;
@@ -105,6 +106,9 @@ public final class App {
 	@Nonnull
 	private static volatile Vibrator vibrator;
 
+	@Nonnull
+	private static volatile ScreenMetrics screenMetrics;
+
 	private App() {
 		throw new AssertionError();
 	}
@@ -161,6 +165,7 @@ public final class App {
 			}
 			App.broadcaster = new CalculatorBroadcaster(application);
 			App.vibrator = new Vibrator(application, preferences);
+			App.screenMetrics = new ScreenMetrics(application);
 			App.initialized = true;
 		} else {
 			throw new IllegalStateException("Already initialized!");
@@ -261,4 +266,9 @@ public final class App {
 	public static Vibrator getVibrator() {
 		return vibrator;
 	}
+
+	@Nonnull
+	public static ScreenMetrics getScreenMetrics() {
+		return screenMetrics;
+	}
 }

android-app/src/main/java/org/solovyev/android/calculator/CalculatorButtons.java

@@ -43,6 +43,7 @@ import org.solovyev.android.calculator.view.NumeralBasesButton;
 import org.solovyev.android.calculator.drag.DragButton;
 import org.solovyev.android.calculator.drag.DragDirection;
 import org.solovyev.android.calculator.drag.SimpleDragListener;
+import org.solovyev.android.calculator.view.ScreenMetrics;
 import org.solovyev.common.math.Point2d;
 
 import javax.annotation.Nonnull;
@@ -64,7 +65,12 @@ public final class CalculatorButtons {
 										  @Nonnull View root) {
 		if (!layout.isOptimized()) {
 
-			final float textSize = root.getContext().getResources().getDimensionPixelSize(R.dimen.cpp_keyboard_button_text_size_mobile);
+			final ScreenMetrics metrics = App.getScreenMetrics();
+			final boolean portrait = metrics.isInPortraitMode();
+			final int buttonsCount = portrait ? 5 : 4;
+			final int buttonsWeight = portrait ? (2 + 1 + buttonsCount) : (2 + buttonsCount);
+			final int buttonSize = metrics.getHeightPxs() / buttonsWeight;
+			final int textSize = 5 * buttonSize / 12;
 
 			Views.processViewsOfType(root, DragButton.class, new Views.ViewProcessor<DragButton>() {
 				@Override

android-app/src/main/java/org/solovyev/android/calculator/view/ScreenMetrics.java

@@ -0,0 +1,120 @@
+package org.solovyev.android.calculator.view;
+
+import android.content.Context;
+import android.content.res.Configuration;
+import android.os.Build;
+import android.util.DisplayMetrics;
+import android.view.WindowManager;
+
+import javax.annotation.Nonnull;
+
+public class ScreenMetrics {
+
+	@Nonnull
+	private final android.view.Display display;
+	@Nonnull
+	private final DisplayMetrics metrics;
+	private float xDpi;
+	private float yDpi;
+	private float diagonalIns;
+	private float widthIns;
+	private float heightIns;
+	private final int layout;
+
+	public ScreenMetrics(@Nonnull Context context) {
+		WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+		display = wm.getDefaultDisplay();
+		metrics = new DisplayMetrics();
+		display.getMetrics(metrics);
+		initDpi();
+		initDimensions();
+		layout = context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK;
+	}
+
+	private void initDpi() {
+		if ((Build.DEVICE.equals("qsd8250_surf")
+				|| Build.MODEL.equals("Dell Streak"))) {
+			xDpi = 190f;
+			yDpi = 190f;
+		} else if (Build.MODEL.equals("VTAB1008")) {
+			xDpi = 160f;
+			yDpi = 160f;
+		} else if (Build.MODEL.equals("Dell Streak 7")) {
+			xDpi = 150f;
+			yDpi = 150f;
+		} else if (Build.MODEL.equals("A1_07")) {
+			xDpi = 127.5f;
+			yDpi = 100f;
+		} else if (Build.MODEL.equals("N12GPS")
+				|| Build.MODEL.equals("MID_Serials")) {
+			xDpi = 133f;
+			yDpi = 133f;
+		} else if (Build.MODEL.startsWith("GT-N710")
+				|| Build.MODEL.equalsIgnoreCase("SCH-N719")
+				|| Build.MODEL.startsWith("SHV-E250")) {
+			xDpi = 267f;
+			yDpi = 267f;
+		} else if (metrics.densityDpi - metrics.xdpi >= 79.0
+				|| metrics.densityDpi - metrics.ydpi >= 79.0
+				|| Math.abs(metrics.ydpi - metrics.xdpi) > 40.0) {
+			xDpi = yDpi = metrics.densityDpi;
+		} else {
+			xDpi = metrics.xdpi;
+			yDpi = metrics.ydpi;
+		}
+	}
+
+	private void initDimensions() {
+		final float w = getWidthPxs() / xDpi;
+		final float h = getHeightPxs() / yDpi;
+		diagonalIns = (float) Math.sqrt(w * w + h * h);
+		widthIns = w;
+		heightIns = h;
+	}
+
+	public boolean isInPortraitMode() {
+		return getWidthPxs() < getHeightPxs();
+	}
+
+	@SuppressWarnings("deprecation")
+	public int getWidthPxs() {
+		return display.getWidth();
+	}
+
+	@SuppressWarnings("deprecation")
+	public int getHeightPxs() {
+		return display.getHeight();
+	}
+
+	public float getWidthIns() {
+		return widthIns;
+	}
+
+	public float getHeightIns() {
+		return heightIns;
+	}
+
+	public int getDensityDpi() {
+		return metrics.densityDpi;
+	}
+
+	public float getDensity() {
+		return metrics.density;
+	}
+
+	public float getXDpi() {
+		return xDpi;
+	}
+
+	public float getYDpi() {
+		return yDpi;
+	}
+
+	public float getDiagonalIns() {
+		return diagonalIns;
+	}
+
+	public int getLayout() {
+		return layout;
+	}
+}

android-app/src/main/res/values-large-hdpi/dimens.xml

@@ -28,5 +28,4 @@
 	<dimen name="cpp_display_text_size_mobile">40sp</dimen>
 
 	<dimen name="cpp_keyboard_button_text_size">24dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">25dp</dimen>
 </resources>

android-app/src/main/res/values-large-mdpi/dimens.xml

@@ -28,5 +28,4 @@
 	<dimen name="cpp_display_text_size_mobile">35sp</dimen>
 
 	<dimen name="cpp_keyboard_button_text_size">35dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">45dp</dimen>
 </resources>

android-app/src/main/res/values-large-tvdpi/dimens.xml

@@ -28,5 +28,4 @@
 	<dimen name="cpp_display_text_size_mobile">35sp</dimen>
 
 	<dimen name="cpp_keyboard_button_text_size">33dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">30dp</dimen>
 </resources>

android-app/src/main/res/values-large-xhdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">30dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">40dp</dimen>
 </resources>

android-app/src/main/res/values-normal-hdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">30dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">20dp</dimen>
 </resources>

android-app/src/main/res/values-normal-mdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">24dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">25dp</dimen>
 </resources>

android-app/src/main/res/values-normal-tvdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">33dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">25dp</dimen>
 </resources>

android-app/src/main/res/values-normal-xhdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">32dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">15dp</dimen>
 </resources>

android-app/src/main/res/values-small-hdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">22dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">14dp</dimen>
 </resources>

android-app/src/main/res/values-small-xhdpi/dimens.xml

@@ -22,5 +22,4 @@
 
 <resources>
 	<dimen name="cpp_keyboard_button_text_size">20dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">10dp</dimen>
 </resources>

android-app/src/main/res/values-xlarge-hdpi/dimens.xml

@@ -29,5 +29,4 @@
 	<dimen name="cpp_display_text_size">30sp</dimen>
 
 	<dimen name="cpp_keyboard_button_text_size">40dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">75dp</dimen>
 </resources>

android-app/src/main/res/values-xlarge-mdpi/dimens.xml

@@ -29,5 +29,4 @@
 	<dimen name="cpp_display_text_size">30sp</dimen>
 
 	<dimen name="cpp_keyboard_button_text_size">35dp</dimen>
-	<dimen name="cpp_keyboard_button_text_size_mobile">65dp</dimen>
 </resources>

android-app/src/main/res/values/dimens.xml

@@ -16,7 +16,6 @@
 	<dimen name="cpp_keyboard_button_text_size">30dp</dimen>
 	<dimen name="cpp_button_text_size">20dp</dimen>
 
-	<dimen name="cpp_keyboard_button_text_size_mobile">20dp</dimen>
 	<dimen name="cpp_display_text_size_mobile">25sp</dimen>
 	<dimen name="cpp_editor_text_size_mobile">25sp</dimen>