Skip to content

Add keyboard arrow key support to scroll #68

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Link-AM wants to merge 2 commits into
base: master
Choose a base branch
from
Open

Add keyboard arrow key support to scroll #68

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
aa496ed
feat: add key event handling to pause/resume autoscroll with arrow keys
Link-AM Feb 7, 2026
05b81e2
Improve smoothscroll animation with autoscroll for manual scrolling w…
Link-AM Feb 12, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
48 changes: 48 additions & 0 deletions app/src/main/java/org/hollowbamboo/chordreader2/views/AutoScrollView.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
import android.animation.ObjectAnimator;
import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.ScrollView;
import android.widget.TextView;
Expand Down Expand Up @@ -294,6 +295,53 @@ public void run() {
return false;
}

@Override
public boolean dispatchKeyEvent(KeyEvent event) {
// Handle arrow keys with scrolling for bluetooth control devices (e.g. STOMP foot pedals)
int action = event.getAction();
int keyCode = event.getKeyCode();

if (keyCode == KeyEvent.KEYCODE_DPAD_UP ||
keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {

if (action == KeyEvent.ACTION_DOWN) {
this.isTouched = true;
if(this.isAutoScrollOn()) {
this.stopAutoScroll();
}

final int SCROLL_AMOUNT = 200;
if (keyCode == KeyEvent.KEYCODE_DPAD_UP) {
smoothScrollBy(0, -SCROLL_AMOUNT);
} else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) {
smoothScrollBy(0, SCROLL_AMOUNT);
}
// Left/Right arrows do nothing

return true; // Consume the event - prevent default behavior

} else if (action == KeyEvent.ACTION_UP) {
// Key released - resume autoscroll after animation completes
this.isTouched = false;
if(this.isAutoScrollOn()) {
this.postDelayed(new Runnable() {
@Override
public void run() {
if(!AutoScrollView.this.isFlingActive() &&
AutoScrollView.this.isAutoScrollOn() &&
!AutoScrollView.this.isAutoScrollActive()) {
AutoScrollView.this.startAutoScroll();
}
}
}, 250);
}
return true;
}
}

return super.dispatchKeyEvent(event);
}




Expand Down