From 3c6220c4f8893b58af5e68ffaeff5951efe1f331 Mon Sep 17 00:00:00 2001 From: Olivier Goffart Date: Thu, 4 Aug 2016 15:46:20 +0200 Subject: Android selection handles This commits implement the cursor and selection handle in the platform plugin. Task-number: QTBUG-34867 Change-Id: Icb3fd9ddfd9f4152e2004078a92a3d9502e9113c Reviewed-by: BogDan Vatra --- .../org/qtproject/qt5/android/CursorHandle.java | 205 +++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 src/android/jar/src/org/qtproject/qt5/android/CursorHandle.java (limited to 'src/android/jar/src/org/qtproject/qt5/android/CursorHandle.java') diff --git a/src/android/jar/src/org/qtproject/qt5/android/CursorHandle.java b/src/android/jar/src/org/qtproject/qt5/android/CursorHandle.java new file mode 100644 index 0000000000..7d26b8fa04 --- /dev/null +++ b/src/android/jar/src/org/qtproject/qt5/android/CursorHandle.java @@ -0,0 +1,205 @@ +/**************************************************************************** +** +** Copyright (C) 2016 Olivier Goffart +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Android port of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +package org.qtproject.qt5.android; + +import android.content.Context; +import android.os.Bundle; +import android.util.DisplayMetrics; +import android.view.LayoutInflater; +import android.view.View; +import android.widget.LinearLayout; +import android.widget.ImageView; +import android.content.res.TypedArray; +import android.graphics.drawable.Drawable; +import android.view.MotionEvent; +import android.widget.PopupWindow; +import android.app.Activity; +import android.view.ViewTreeObserver; + +/* This view represents one of the handle (selection or cursor handle) */ +class CursorView extends ImageView +{ + private CursorHandle mHandle; + // The coordinare which where clicked + private int m_offsetX; + private int m_offsetY; + + CursorView (Context context, CursorHandle handle) { + super(context); + mHandle = handle; + } + + // Called when the handle was moved programatically , 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 = Math.round(ev.getRawX()); + m_offsetY = Math.round(ev.getRawY()); + break; + } + + case MotionEvent.ACTION_MOVE: { + mHandle.updatePosition(Math.round(ev.getRawX()) - m_offsetX, + Math.round(ev.getRawY()) - m_offsetY); + break; + } + + case MotionEvent.ACTION_UP: + break; + + case MotionEvent.ACTION_CANCEL: + break; + } + return true; + } + +} + +// Helper class that manages a cursor or selection handle +public class CursorHandle implements ViewTreeObserver.OnPreDrawListener +{ + private View m_layout = null; + private CursorView m_cursorView = null; + private PopupWindow m_popup = null; + private int m_id; + private int m_attr; + private Activity m_activity; + private int m_posX; + private int m_posY; + private int m_lastX; + private int m_lastY; + int tolerance; + + public CursorHandle(Activity activity, View layout, int id, int attr) { + m_activity = activity; + m_id = id; + m_attr = attr; + m_layout = layout; + DisplayMetrics metrics = new DisplayMetrics(); + activity.getWindowManager().getDefaultDisplay().getMetrics(metrics); + tolerance = Math.round(2 * metrics.density); + m_lastX = m_lastY = -1 - tolerance; + } + + private boolean initOverlay(){ + if (m_popup == null){ + + 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_layout.addView(m_cursorView); + + m_popup = new PopupWindow(context, null, android.R.attr.textSelectHandleWindowStyle); + m_popup.setSplitTouchEnabled(true); + m_popup.setClippingEnabled(false); + m_popup.setContentView(m_cursorView); + m_popup.setWidth(drawable.getIntrinsicWidth()); + m_popup.setHeight(drawable.getIntrinsicHeight()); + + m_layout.getViewTreeObserver().addOnPreDrawListener(this); + } + return true; + } + + // 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[] location = new int[2]; + m_layout.getLocationOnScreen(location); + + int x2 = x + location[0]; + int y2 = y + location[1]; + + if (m_id == QtNative.IdCursorHandle) { + x2 -= m_cursorView.getWidth() / 2 ; + } else if (m_id == QtNative.IdLeftHandle) { + x2 -= m_cursorView.getWidth() * 3 / 4; + } else if (m_id == QtNative.IdRightHandle) { + x2 -= m_cursorView.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 void hide() { + if (m_popup != null) { + m_popup.dismiss(); + } + } + + // The handle was dragged by a given relative position + public void updatePosition(int x, int y) { + if (Math.abs(m_lastX - x) > tolerance || Math.abs(m_lastY - y) > tolerance) { + QtNative.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; + } +} -- cgit v1.2.3