08c0904a84
If the first press isn't ignored by the drag area then the first flick won't work. The problem has something to do with this drag area as everything works fine if the drag area is removed. Couldn't figure out what exactly the problem was and what's wrong with the initial focus, but this hack makes things work.
285 lines
12 KiB
QML
285 lines
12 KiB
QML
/*
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Copyright (C) 2015 Jolla Ltd.
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Contact: Slava Monich <slava.monich@jolla.com>
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You may use this file under the terms of BSD license as follows:
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the Jolla Ltd nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
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BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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*/
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import QtQuick 2.0
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import Sailfish.Silica 1.0
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MouseArea {
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id: root
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parent: dragInProgress ? dragParent : gridView
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anchors.fill: parent
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propagateComposedEvents: true
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signal deleteItemAt(var index)
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signal dropItem(var mouseX, var mouseY)
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property var dragParent
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property var gridView
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property int draggedItemIndex: -1
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property int pressedItemIndex: -1
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property int pressedDeleteItemIndex: -1
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property int lastPressedItemScalingIndex: -1
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property int lastReleasedItemIndex: -1
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property int lastReleasedDeleteItemIndex: -1
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property bool pressedItemScaling: (pressedItemIndex >= 0 && lastPressedItemScalingIndex === pressedItemIndex)
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property bool dragPositionChanged
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property bool dragCloseToTheLeftEdge
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property bool dragCloseToTheRightEdge
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property real dragLastX
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property real dragLastY
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property bool _ignorePress: true
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onDraggedItemIndexChanged: {
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draggedItem = (draggedItemIndex >= 0) ? shelf.get(draggedItemIndex) : null
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}
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function itemX(index) { return shelfView.cellWidth * (index % shelfView._cellsPerRow) - gridView.contentX }
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function itemY(index) { return shelfView.cellHeight * Math.floor(index / shelfView._cellsPerRow) - gridView.contentY }
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onCanceled: {
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stopDrag()
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}
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onClicked: {
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var index
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if (shelfView.editMode) {
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if (!dragInProgress || !dragPositionChanged) {
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index = gridView.indexAt(mouseX + gridView.contentX, mouseY + currentShelfView.contentY)
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if (index >= 0 &&
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index === lastReleasedDeleteItemIndex &&
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dragItem.withinDeleteButton(mouseX - itemX(index), mouseY - itemY(index))) {
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lastReleasedDeleteItemIndex = -1
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root.deleteItemAt(index)
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dragScrollAnimation.stop()
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} else if (shelfView.shelf.deleteRequested(index)) {
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shelfView.shelf.setDeleteRequested(index, false);
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} else {
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shelfView.stopEditing()
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}
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}
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} else {
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index = gridView.indexAt(mouseX + gridView.contentX, mouseY + currentShelfView.contentY)
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if (index >= 0) {
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if (index === lastReleasedItemIndex) {
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var item = shelf.get(index);
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if (item.accessible) {
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if (item.book) {
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shelfView.openBook(item.book)
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} else if (item.shelf) {
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var path = shelfView.shelf.relativePath
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shelfView.shelf.relativePath = path ? (path + "/" + item.shelf.name) : item.shelf.name
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}
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}
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}
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} else if (mouseY + gridView.contentY < 0) {
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// Let the header item handle it
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mouse.accepted = false
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}
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}
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resetPressState()
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dragScrollAnimation.stop()
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}
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onPressed: {
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var index = gridView.indexAt(mouseX + gridView.contentX, mouseY + currentShelfView.contentY)
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lastReleasedItemIndex = -1
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lastReleasedDeleteItemIndex = -1
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pressedItemIndex = index
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if (pressedDeleteItemIndex < 0 &&
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dragItem.withinDeleteButton(mouseX - itemX(index), mouseY - itemY(index))) {
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pressedDeleteItemIndex = index
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} else {
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pressedDeleteItemIndex = -1
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}
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if (mouseY + gridView.contentY < 0) {
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// Let the header item handle it
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mouse.accepted = false
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} else if (_ignorePress) {
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// If the first press isn't ignored here then the first flick
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// won't work. The problem has something to do with this drag
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// area as everything works fine if the drag area is removed.
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// Couldn't figure out what exactly the problem was and what's
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// wrong with the initial focus, but this hack makes things work.
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_ignorePress = false
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mouse.accepted = false
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}
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}
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onReleased: {
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stopDrag(mouseX, mouseY)
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if (mouseY + gridView.contentY < 0) {
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// Let the header item handle it
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mouse.accepted = false
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}
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}
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onPressAndHold: {
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if (!shelfView.editMode) {
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shelfView.startEditing()
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}
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}
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onPositionChanged: {
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if (shelfView.editMode) {
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if (!pressedItemScaling && !dragInProgress && pressedDeleteItemIndex < 0) {
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startDrag(mouseX, mouseY)
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} else {
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doDrag(mouseX, mouseY)
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}
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}
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}
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function startDrag(x, y) {
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var index = gridView.indexAt(x + gridView.contentX, y + currentShelfView.contentY)
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if (index >= 0) {
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var item = shelf.get(index)
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if (item.accessible) {
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var delta = gridView.mapToItem(dragParent,0,0)
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console.log(shelf.path, "dragging", item.name)
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dragLastX = x + delta.x
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dragLastY = y + delta.y
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dragItem.moveAnimationEnabled = false
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dragItem.shelfIndex = shelfView.shelfIndex
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dragItem.dropShelfIndex = -1
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dragItem.dropItemIndex = -1
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dragItem.x = itemX(index) + delta.x
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dragItem.y = itemY(index) + delta.y
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dragCloseToTheLeftEdge = (x < horizontalScrollThreshold)
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dragCloseToTheRightEdge = (x > (gridView.width - horizontalScrollThreshold))
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dragPositionChanged = false
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draggedItemIndex = index
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pressedItemIndex = -1
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dragItem.visible = true
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} else {
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console.log(item.name, "is not draggable")
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}
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}
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}
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function doDrag(x, y) {
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if (dragInProgress && !dragItem.moving) {
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var dx = x - dragLastX
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var dy = y - dragLastY
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if (dx !== 0 || dy !== 0) {
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dragPositionChanged = true
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dragItem.x += dx
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dragItem.y += dy
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dragLastX = x
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dragLastY = y
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var newIndex = currentShelfView.indexAt(x + gridView.contentX, Math.max(y + currentShelfView.contentY, 0))
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if (newIndex < 0) newIndex = currentShelf.count - 1
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if (newIndex >= 0) {
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if (currentShelf.hasDummyItem) {
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currentShelf.dummyItemIndex = newIndex
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} else {
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currentShelf.move(draggedItemIndex, newIndex)
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draggedItemIndex = newIndex
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}
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}
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if (y < verticalScrollThreshold && currentShelfView.contentY > 0) {
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if (!dragScrollAnimation.running) {
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dragScrollAnimation.from = currentShelfView.contentY
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dragScrollAnimation.to = 0
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dragScrollAnimation.duration = currentShelfView.contentY*1000/gridView.height
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dragScrollAnimation.start()
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}
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} else if (y > (gridView.height - verticalScrollThreshold) && (currentShelfView.contentY < maxContentY)) {
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if (!dragScrollAnimation.running) {
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dragScrollAnimation.from = currentShelfView.contentY
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dragScrollAnimation.to = maxContentY
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dragScrollAnimation.duration = (maxContentY - currentShelfView.contentY)*1000/gridView.height
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dragScrollAnimation.start()
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}
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} else {
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if (dragScrollAnimation.running) {
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dragScrollAnimation.stop()
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}
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if (x < horizontalScrollThreshold) {
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if (!dragCloseToTheLeftEdge) {
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dragCloseToTheLeftEdge = true
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shelfView.scrollLeft()
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}
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} else {
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dragCloseToTheLeftEdge = false
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}
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if (x > (gridView.width - horizontalScrollThreshold)) {
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if (!dragCloseToTheRightEdge) {
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dragCloseToTheRightEdge = true
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shelfView.scrollRight()
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}
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} else {
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dragCloseToTheRightEdge = false
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}
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}
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}
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}
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}
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function stopDrag(x, y) {
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lastReleasedItemIndex = pressedItemIndex
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lastReleasedDeleteItemIndex = pressedDeleteItemIndex
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if (draggedItemIndex >= 0) {
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if (x !== undefined && y !== undefined) doDrag(x, y)
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var delta = gridView.mapToItem(dragParent,0,0)
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dragItem.moveAnimationEnabled = true
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dragItem.x = itemX(draggedItemIndex) + delta.x
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dragItem.y = itemY(draggedItemIndex) + delta.y
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// Allow the listener to modify dragItem coordinates
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if (x !== undefined && y !== undefined) root.dropItem(x,y)
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dragItem.dragged = false
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// Normally we would finish things up once all the
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// animations have completed
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if (!dragItem.animating) finishDrag()
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}
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pressedItemIndex = -1
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dragScrollAnimation.stop()
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}
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function finishDrag() {
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console.log(shelf.path, "done with drag animation")
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draggedItemIndex = -1
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dragItem.dropShelfIndex = -1
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dragItem.dropItemIndex = -1
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dragItem.moveAnimationEnabled = false
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dragItem.visible = false
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}
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function resetPressState() {
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pressedItemIndex = -1
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pressedDeleteItemIndex = -1
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lastReleasedItemIndex = -1
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lastReleasedDeleteItemIndex = -1
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dragCloseToTheLeftEdge = false
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dragCloseToTheRightEdge = false
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}
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NumberAnimation {
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id: dragScrollAnimation
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target: currentShelfView
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property: "contentY"
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easing.type: Easing.InOutQuad
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}
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}
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