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Add an extra keys view

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This commit is contained in:
Fredrik Fornwall
2016-05-20 10:41:38 +02:00
parent 042fbfaea3
commit 8714800c6b
1 changed files with 144 additions and 0 deletions
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app/src/main/java/com/termux/app/ExtraKeysView.java Normal file
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package com.termux.app;
import android.content.Context;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.widget.Button;
import android.widget.GridLayout;
import android.widget.ToggleButton;
import com.termux.view.TerminalView;
/**
* A view showing extra keys (such as Escape, Ctrl, Alt) not normally available on an Android soft
* keyboard.
*/
public final class ExtraKeysView extends GridLayout implements TerminalView.KeyboardModifiers {
private static final int TEXT_COLOR = 0xFFFFFFFF;
public ExtraKeysView(Context context, AttributeSet attrs) {
super(context, attrs);
reload();
}
private static int keyNameToKeyCode(String keyName) {
switch (keyName) {
case "ESC": return KeyEvent.KEYCODE_ESCAPE;
case "TAB": return KeyEvent.KEYCODE_TAB;
case "▲": return KeyEvent.KEYCODE_DPAD_UP;
case "◀": return KeyEvent.KEYCODE_DPAD_LEFT;
case "▶": return KeyEvent.KEYCODE_DPAD_RIGHT;
case "▼": return KeyEvent.KEYCODE_DPAD_DOWN;
default: return -1;
}
}
private ToggleButton controlButton;
private ToggleButton altButton;
private ToggleButton fnButton;
public boolean readControlButton() {
boolean result = controlButton.isChecked();
if (result) {
controlButton.setChecked(false);
controlButton.setTextColor(TEXT_COLOR);
}
return result;
}
public boolean readAltButton() {
boolean result = altButton.isChecked();
if (result) {
altButton.setChecked(false);
altButton.setTextColor(TEXT_COLOR);
}
return result;
}
public boolean readFnButton() {
boolean result = fnButton.isChecked();
if (result) {
fnButton.setChecked(false);
fnButton.setTextColor(TEXT_COLOR);
}
return result;
}
void reload() {
altButton = controlButton = null;
removeAllViews();
String[][] buttons = {
{"ESC", "CTRL", "ALT", "▲", "▼", "◀", "▶"}
};
final int rows = buttons.length;
final int cols = buttons[0].length;
setRowCount(rows);
setColumnCount(cols);
for (int row = 0; row < rows; row++) {
for (int col = 0; col < cols; col++) {
final String buttonText = buttons[row][col];
Button button;
switch (buttonText) {
case "CTRL":
button = controlButton = new ToggleButton(getContext(), null, android.R.attr.buttonBarButtonStyle);
break;
case "ALT":
button = altButton = new ToggleButton(getContext(), null, android.R.attr.buttonBarButtonStyle);
break;
case "FN":
button = fnButton = new ToggleButton(getContext(), null, android.R.attr.buttonBarButtonStyle);
break;
default:
button = new Button(getContext(), null, android.R.attr.buttonBarButtonStyle);
break;
}
button.setText(buttonText);
button.setTextColor(TEXT_COLOR);
final Button finalButton = button;
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View root = getRootView();
switch (buttonText) {
case "CTRL":
case "ALT":
case "FN":
ToggleButton self = (ToggleButton) finalButton;
self.setChecked(self.isChecked());
self.setTextColor(self.isChecked() ? 0xFF80DEEA : TEXT_COLOR);
break;
default:
int keyCode = keyNameToKeyCode(buttonText);
root.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode));
root.dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, keyCode));
break;
}
}
});
GridLayout.LayoutParams param = new GridLayout.LayoutParams();
param.height = param.width = 0;
param.rightMargin = param.topMargin = 0;
param.setGravity(Gravity.LEFT);
float weight = "▲▼◀▶".contains(buttonText) ? 0.7f : 1.f;
param.columnSpec = GridLayout.spec(col, weight);
param.rowSpec = GridLayout.spec(row, 1.f);
button.setLayoutParams(param);
addView(button);
}
}
}
}