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Diffstat (limited to 'src/imports/virtualkeyboard/components/AutoScroller.qml')
| -rw-r--r-- | src/imports/virtualkeyboard/components/AutoScroller.qml | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/imports/virtualkeyboard/components/AutoScroller.qml b/src/imports/virtualkeyboard/components/AutoScroller.qml new file mode 100644 index 0000000..bbdc5da --- /dev/null +++ b/src/imports/virtualkeyboard/components/AutoScroller.qml @@ -0,0 +1,115 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +import QtQuick 2.0 +import Boot2Qt.InputContext 1.0 + +Item { + property var innerFlickable + property var outerFlickable + property var inputItem: Qt.inputMethod.inputItem + + onInputItemChanged: { + if (inputItem) { + var parent_ = inputItem.parent + while (parent_) { + if (parent_.maximumFlickVelocity) { + if (innerFlickable) { + outerFlickable = parent_ + break + } else { + innerFlickable = parent_ + } + } + parent_ = parent_.parent + } + delayedLoading.triggered() + } + } + + function ensureVisible(flickable) { + if (Qt.inputMethod.visible && inputItem && flickable && flickable.visible && flickable.interactive) { + + var verticallyFlickable = (flickable.flickableDirection == Flickable.HorizontalAndVerticalFlick || flickable.flickableDirection == Flickable.VerticalFlick + || (flickable.flickableDirection == Flickable.AutoFlickDirection && flickable.contentHeight > flickable.height)) + var horizontallyFlickable = (flickable.flickableDirection == Flickable.HorizontalAndVerticalFlick || flickable.flickableDirection == Flickable.HorizontalFlick + || (flickable.flickableDirection == Flickable.AutoFlickDirection && flickable.contentWidth > flickable.width)) + + if (!verticallyFlickable && !horizontallyFlickable) + return + + var cursorRectangle = flickable.contentItem.mapFromItem(inputItem, inputItem.cursorRectangle.x, inputItem.cursorRectangle.y) + + var oldContentY = flickable.contentY + if (verticallyFlickable) { + var scrollMarginVertical = (flickable && flickable.scrollMarginVertical) ? flickable.scrollMarginVertical : 10 + if (flickable.contentY >= cursorRectangle.y - scrollMarginVertical) + flickable.contentY = Math.max(0, cursorRectangle.y - scrollMarginVertical) + else if (flickable.contentY + flickable.height <= cursorRectangle.y + inputItem.cursorRectangle.height + scrollMarginVertical) + flickable.contentY = Math.min(flickable.contentHeight - flickable.height, cursorRectangle.y + inputItem.cursorRectangle.height - flickable.height + scrollMarginVertical) + } + if (horizontallyFlickable) { + var scrollMarginHorizontal = (flickable && flickable.scrollMarginHorizontal) ? flickable.scrollMarginHorizontal : 10 + if (flickable.contentX >= cursorRectangle.x - scrollMarginHorizontal) + flickable.contentX = Math.max(0, cursorRectangle.x - scrollMarginHorizontal) + else if (flickable.contentX + flickable.width <= cursorRectangle.x + inputItem.cursorRectangle.width + scrollMarginHorizontal) + flickable.contentX = Math.min(flickable.contentWidth - flickable.width, cursorRectangle.x + inputItem.cursorRectangle.width - flickable.width + scrollMarginHorizontal) + } + } + } + Timer { + id: delayedLoading + interval: 10 + onTriggered: { + ensureVisible(innerFlickable) + ensureVisible(outerFlickable) + } + } + Connections { + ignoreUnknownSignals: true + target: Qt.inputMethod.inputItem && Qt.inputMethod.animating ? Qt.inputMethod : null + onKeyboardRectangleChanged: delayedLoading.triggered() + } + Connections { + ignoreUnknownSignals: true + target: Qt.inputMethod.inputItem && Qt.inputMethod.inputItem.activeFocus ? Qt.inputMethod.inputItem : null + onCursorRectangleChanged: delayedLoading.triggered() + } +} |