examples/calculator/src/android_calculator.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Aesthetic adaptations for Android
  16 module android_calculator
  17
  18 import calculator
  19 import android::ui
  20
  21 redef class Button
  22         init do set_android_style(native, (text or else "?").is_int)
  23
  24         private fun set_android_style(java_button: NativeButton, is_number: Bool)
  25         in "Java" `{
  26                 // Flatten the background and use a different color for digit buttons
  27                 int color = is_number? android.graphics.Color.DKGRAY: android.graphics.Color.TRANSPARENT;
  28                 java_button.setBackgroundColor(color);
  29
  30                 // Center the label on both horizontal and vertical axes
  31                 java_button.setGravity(android.view.Gravity.CENTER);
  32
  33                 // Set lowercase text to correctly display constants like e and π
  34                 java_button.setAllCaps(false);
  35         `}
  36 end