new transaction: add a clear button to edited fields

makes it easy to clear a field's text without select-all or holding on the
backspace key

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/activity/NewTransactionActivity.java b/app/src/main/java/net/ktnx/mobileledger/ui/activity/NewTransactionActivity.java
index d37f4b58786d69bbc1af63b0ce8c646f81153fb2..9062f545540a5c9db23c6d7bd11f82f38808da79 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/activity/NewTransactionActivity.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/activity/NewTransactionActivity.java
@@ -19,6 +19,7 @@ package net.ktnx.mobileledger.ui.activity;
 
 import android.annotation.SuppressLint;
 import android.database.Cursor;
+import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.text.Editable;
@@ -104,6 +105,7 @@ public class NewTransactionActivity extends ProfileThemedActivity
         MLDB.hookAutocompletionAdapter(this, tvDescription, MLDB.DESCRIPTION_HISTORY_TABLE,
                 "description", false, findViewById(R.id.new_transaction_acc_1), this, mProfile);
         hookTextChangeListener(tvDescription);
+        hookClearClickListener(tvDescription);
 
         progress = findViewById(R.id.save_transaction_progress);
         fab = findViewById(R.id.fab);
@@ -115,6 +117,77 @@ public class NewTransactionActivity extends ProfileThemedActivity
         while (table.getChildCount() < 2) {
             doAddAccountRow(false);
         }
+
+        check_transaction_submittable();
+    }
+    private void hookClearClickListener(AutoCompleteTextView v) {
+        final TextWatcher w = new TextWatcher() {
+            private boolean hasText;
+            private boolean hadText;
+            @Override
+            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+                hadText = s.length() > 0;
+            }
+            @Override
+            public void onTextChanged(CharSequence s, int start, int before, int count) {
+
+            }
+            @Override
+            public void afterTextChanged(Editable s) {
+                hasText = s.length() > 0;
+
+                if (hadText && !hasText) {
+                    v.setCompoundDrawablesRelative(null, null, null, null);
+                }
+                if (!hadText && hasText) {
+                    v.setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0,
+                            R.drawable.ic_clear_black_24dp, 0);
+                }
+            }
+        };
+        View.OnFocusChangeListener prevFocusListener = v.getOnFocusChangeListener();
+        v.setOnFocusChangeListener((v12, hasFocus) -> {
+            if (hasFocus) {
+                if (((TextView) v12).getText().length() > 0) {
+                    ((TextView) v12).setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0,
+                            R.drawable.ic_clear_black_24dp, 0);
+                }
+                ((TextView) v12).addTextChangedListener(w);
+            }
+            else {
+                ((TextView) v12).removeTextChangedListener(w);
+                ((TextView) v12).setCompoundDrawables(null, null, null, null);
+            }
+
+            if (prevFocusListener != null) prevFocusListener.onFocusChange(v12, hasFocus);
+        });
+
+        v.setOnTouchListener((v1, event) -> {
+            if (event.getAction() == MotionEvent.ACTION_UP)
+                if (((TextView) v1).getText().length() > 0) {
+                    boolean clearClicked = false;
+                    final float x = event.getX();
+                    final int vw = v1.getWidth();
+                    // start, top, end, bottom (end == 2)
+                    Drawable dwb = ((TextView) v1).getCompoundDrawablesRelative()[2];
+                    if (dwb != null) {
+                        final int dw = dwb.getBounds().width();
+                        if (v1.getLayoutDirection() == View.LAYOUT_DIRECTION_LTR) {
+                            if ((x > vw - dw)) clearClicked = true;
+                        }
+                        else {
+                            if (x < vw - dw) clearClicked = true;
+                        }
+                        if (clearClicked) {
+                            ((TextView) v1).setText("");
+                            v1.requestFocus();
+                            return true;
+                        }
+                    }
+                }
+            v.performClick();
+            return false;
+        });
     }
     @Override
     protected void initProfile() {
@@ -365,6 +438,7 @@ public class NewTransactionActivity extends ProfileThemedActivity
         MLDB.hookAutocompletionAdapter(this, acc, MLDB.ACCOUNTS_TABLE, "name", true, amt, null,
                 mProfile);
         hookTextChangeListener(acc);
+        hookClearClickListener(acc);
         hookTextChangeListener(amt);
 
         return row;