diff options
Diffstat (limited to 'src/android/jar/src/org/qtproject/qt/android/CursorHandle.java')
| -rw-r--r-- | src/android/jar/src/org/qtproject/qt/android/CursorHandle.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/src/android/jar/src/org/qtproject/qt/android/CursorHandle.java b/src/android/jar/src/org/qtproject/qt/android/CursorHandle.java new file mode 100644 index 0000000000..7e601c0551 --- /dev/null +++ b/src/android/jar/src/org/qtproject/qt/android/CursorHandle.java @@ -0,0 +1,199 @@ +// Copyright (C) 2016 Olivier Goffart <ogoffart@woboq.com> +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +package org.qtproject.qt.android; + +import android.annotation.SuppressLint; +import android.app.Activity; +import android.content.Context; +import android.content.res.TypedArray; +import android.graphics.drawable.Drawable; +import android.util.DisplayMetrics; +import android.util.Log; +import android.util.TypedValue; +import android.view.MotionEvent; +import android.view.View; +import android.view.ViewTreeObserver; +import android.widget.ImageView; +import android.widget.PopupWindow; + +/* This view represents one of the handle (selection or cursor handle) */ +@SuppressLint("ViewConstructor") +class CursorView extends ImageView +{ + private final CursorHandle mHandle; + // The coordinate which where clicked + private float m_offsetX; + private float m_offsetY; + private boolean m_pressed = false; + + CursorView (Context context, CursorHandle handle) { + super(context); + mHandle = handle; + } + + // Called when the handle was moved programmatically , with the delta amount in pixels + public void adjusted(int dx, int dy) { + m_offsetX += dx; + m_offsetY += dy; + } + + @Override + public boolean onTouchEvent(MotionEvent ev) { + switch (ev.getActionMasked()) { + case MotionEvent.ACTION_DOWN: { + m_offsetX = ev.getRawX(); + m_offsetY = ev.getRawY() + (float) getHeight() / 2; + m_pressed = true; + break; + } + + case MotionEvent.ACTION_MOVE: { + if (!m_pressed) + return false; + mHandle.updatePosition(Math.round(ev.getRawX() - m_offsetX), + Math.round(ev.getRawY() - m_offsetY)); + break; + } + + case MotionEvent.ACTION_UP: + case MotionEvent.ACTION_CANCEL: + m_pressed = false; + break; + } + return true; + } +} + +// Helper class that manages a cursor or selection handle +class CursorHandle implements ViewTreeObserver.OnPreDrawListener +{ + private static final String QtTag = "QtCursorHandle"; + private final View m_layout; + private CursorView m_cursorView = null; + private PopupWindow m_popup = null; + private final int m_id; + private final int m_attr; + private final Activity m_activity; + private int m_posX = 0; + private int m_posY = 0; + private int m_lastX; + private int m_lastY; + int tolerance; + private final boolean m_rtl; + int m_yShift; + + public CursorHandle(Activity activity, View layout, int id, int attr, boolean rtl) { + m_activity = activity; + m_id = id; + m_attr = attr; + m_layout = layout; + DisplayMetrics metrics = activity.getResources().getDisplayMetrics(); + m_yShift = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_MM, 1f, metrics); + tolerance = Math.min(1, (int)(m_yShift / 2f)); + m_lastX = m_lastY = -1 - tolerance; + m_rtl = rtl; + } + + private void initOverlay(){ + if (m_popup != null) + return; + + Context context = m_layout.getContext(); + int[] attrs = {m_attr}; + TypedArray a = context.getTheme().obtainStyledAttributes(attrs); + Drawable drawable = a.getDrawable(0); + + m_cursorView = new CursorView(context, this); + m_cursorView.setImageDrawable(drawable); + + m_popup = new PopupWindow(context, null, android.R.attr.textSelectHandleWindowStyle); + m_popup.setSplitTouchEnabled(true); + m_popup.setClippingEnabled(false); + m_popup.setContentView(m_cursorView); + if (drawable != null) { + m_popup.setWidth(drawable.getIntrinsicWidth()); + m_popup.setHeight(drawable.getIntrinsicHeight()); + } else { + Log.w(QtTag, "initOverlay(): cannot get width/height for popup " + + "from null drawable for attribute " + m_attr); + } + + m_layout.getViewTreeObserver().addOnPreDrawListener(this); + } + + // Show the handle at a given position (or move it if it is already shown) + public void setPosition(final int x, final int y){ + initOverlay(); + + final int[] layoutLocation = new int[2]; + m_layout.getLocationOnScreen(layoutLocation); + + // These values are used for handling split screen case + final int[] activityLocation = new int[2]; + final int[] activityLocationInWindow = new int[2]; + m_activity.getWindow().getDecorView().getLocationOnScreen(activityLocation); + m_activity.getWindow().getDecorView().getLocationInWindow(activityLocationInWindow); + + int x2 = x + layoutLocation[0] - activityLocation[0]; + int y2 = y + layoutLocation[1] + m_yShift + (activityLocationInWindow[1] - activityLocation[1]); + + if (m_id == QtInputDelegate.IdCursorHandle) { + x2 -= m_popup.getWidth() / 2 ; + } else if ((m_id == QtInputDelegate.IdLeftHandle && !m_rtl) || (m_id == QtInputDelegate.IdRightHandle && m_rtl)) { + x2 -= m_popup.getWidth() * 3 / 4; + } else { + x2 -= m_popup.getWidth() / 4; + } + + if (m_popup.isShowing()) { + m_popup.update(x2, y2, -1, -1); + m_cursorView.adjusted(x - m_posX, y - m_posY); + } else { + m_popup.showAtLocation(m_layout, 0, x2, y2); + } + + m_posX = x; + m_posY = y; + } + + public int bottom() + { + initOverlay(); + final int[] location = new int[2]; + m_cursorView.getLocationOnScreen(location); + return location[1] + m_cursorView.getHeight(); + } + + public void hide() { + if (m_popup != null) { + m_popup.dismiss(); + } + } + + public int width() + { + return m_cursorView.getDrawable().getIntrinsicWidth(); + } + + // The handle was dragged by a given relative position + public void updatePosition(int x, int y) { + y -= m_yShift; + if (Math.abs(m_lastX - x) > tolerance || Math.abs(m_lastY - y) > tolerance) { + QtInputDelegate.handleLocationChanged(m_id, x + m_posX, y + m_posY); + m_lastX = x; + m_lastY = y; + } + } + + @Override + public boolean onPreDraw() { + // This hook is called when the view location is changed + // For example if the keyboard appears. + // Adjust the position of the handle accordingly + if (m_popup != null && m_popup.isShowing()) + setPosition(m_posX, m_posY); + + return true; + } +} |