6502Android/app/src/main/kotlin/android/emu6502/app/MainActivity.kt

package android.emu6502.app

import android.emu6502.Emulator
import android.emu6502.R
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.view.View
import androidx.appcompat.app.ActionBar
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.snackbar.Snackbar
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.toolbar.*

class MainActivity : AppCompatActivity() {
  private var emulator: Emulator? = null

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    setSupportActionBar(toolbar)
    val ab: ActionBar = supportActionBar!!
    ab.setDisplayHomeAsUpEnabled(true)

    fabRun.setOnClickListener {
      display_wrapper.visibility = View.VISIBLE
      emulator = Emulator(display)
      val emu: Emulator = emulator as Emulator
      emu.assembler.assembleCode(txtInstructions.text.toString().split("\n"))
      Snackbar.make(layout_content,
          "Code assembled successfully, ${emu.assembler.codeLen} bytes.",
          Snackbar.LENGTH_SHORT).show()
      emu.cpu.run()
    }

    btnReset.setOnClickListener {
      val emu: Emulator = emulator as Emulator
      emu.reset()
    }

    val onClickButton = { code: Int ->
      if (emulator != null) {
        val emu = emulator as Emulator
        emu.cpu.memory.storeKeypress(code)
      }
    }
    arrowLeft.setOnClickListener  { onClickButton(0x61) }
    arrowRight.setOnClickListener { onClickButton(0x64) }
    arrowUp.setOnClickListener    { onClickButton(0x77) }
    arrowDown.setOnClickListener  { onClickButton(0x73) }
  }

  override fun onCreateOptionsMenu(menu: Menu?): Boolean {
    // Inflate the menu; this adds items to the action bar if it is present.
    menuInflater.inflate(R.menu.menu_main, menu)
    return true
  }

  override fun onOptionsItemSelected(item: MenuItem?): Boolean {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    val id = item!!.itemId
    return if (id == R.id.action_settings) {
      true
    } else {
      super.onOptionsItemSelected(item)
    }
  }
}