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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
import Qt 4.7
Rectangle {
id: editor
color: "lightGrey"
width: 640; height: 480
Rectangle {
color: "white"
anchors.fill: parent
anchors.margins: 20
BorderImage {
id: startHandle
source: "pics/startHandle.sci"
opacity: 0.0
width: 10
x: edit.positionToRectangle(edit.selectionStart).x-flick.contentX-width
y: edit.positionToRectangle(edit.selectionStart).y-flick.contentY
height: edit.positionToRectangle(edit.selectionStart).height
}
BorderImage {
id: endHandle
source: "pics/endHandle.sci"
opacity: 0.0
width: 10
x: edit.positionToRectangle(edit.selectionEnd).x-flick.contentX
y: edit.positionToRectangle(edit.selectionEnd).y-flick.contentY
height: edit.positionToRectangle(edit.selectionEnd).height
}
Flickable {
id: flick
anchors.fill: parent
contentWidth: edit.paintedWidth
contentHeight: edit.paintedHeight
interactive: true
clip: true
function ensureVisible(r)
{
if (contentX >= r.x)
contentX = r.x;
else if (contentX+width <= r.x+r.width)
contentX = r.x+r.width-width;
if (contentY >= r.y)
contentY = r.y;
else if (contentY+height <= r.y+r.height)
contentY = r.y+r.height-height;
}
TextEdit {
id: edit
width: flick.width
height: flick.height
focus: true
wrapMode: TextEdit.Wrap
onCursorRectangleChanged: flick.ensureVisible(cursorRectangle)
text: "<h1>Text Selection</h1>"
+"<p>This example is a whacky text selection mechanisms, showing how these can be implemented in the TextEdit element, to cater for whatever style is appropriate for the target platform."
+"<p><b>Press-and-hold</b> to select a word, then drag the selection handles."
+"<p><b>Drag outside the selection</b> to scroll the text."
+"<p><b>Click inside the selection</b> to cut/copy/paste/cancel selection."
+"<p>It's too whacky to let you paste if there is no current selection."
MouseArea {
x: -startHandle.width
y: 0
width: parent.width+startHandle.width+endHandle.width
height: parent.height
property string drag: "";
property int pressPos;
onPressAndHold: {
if (editor.state == "") {
edit.cursorPosition = edit.positionAt(mouse.x+x,mouse.y+y);
edit.selectWord();
editor.state = "selection"
}
}
onClicked: {
if (editor.state == "") {
edit.cursorPosition = edit.positionAt(mouse.x+x,mouse.y+y);
if (!edit.focus)
edit.focus = true;
edit.openSoftwareInputPanel();
}
}
function hitHandle(h,x,y) { return x>=h.x+flick.contentX && x<h.x+flick.contentX+h.width && y>=h.y+flick.contentY && y<h.y+flick.contentY+h.height }
onPressed: {
if (editor.state == "selection") {
if (hitHandle(startHandle,mouse.x+x,mouse.y+y)) {
drag = "start"
flick.interactive = false
} else if (hitHandle(endHandle,mouse.x+x,mouse.y+y)) {
drag = "end"
flick.interactive = false
} else {
var pos = edit.positionAt(mouse.x+x,mouse.y+y);
if (pos >= edit.selectionStart && pos <= edit.selectionEnd) {
drag = "selection"
flick.interactive = false
} else {
drag = ""
flick.interactive = true
}
}
}
}
onReleased: {
if (editor.state == "selection") {
if (drag == "selection") {
editor.state = "menu"
}
drag = ""
}
flick.interactive = true
}
onPositionChanged: {
if (editor.state == "selection" && drag != "") {
if (drag == "start") {
var pos = edit.positionAt(mouse.x+x+startHandle.width/2,mouse.y+y);
var e = edit.selectionEnd;
if (e < pos)
e = pos;
edit.select(pos,e);
} else if (drag == "end") {
var pos = edit.positionAt(mouse.x+x-endHandle.width/2,mouse.y+y);
var s = edit.selectionStart;
if (s > pos)
s = pos;
edit.select(s,pos);
}
}
}
}
}
}
Item {
id: menu
opacity: 0.0
width: 100
height: 120
anchors.centerIn: parent
Rectangle {
border.width: 1
border.color: "darkBlue"
radius: 15
color: "#806080FF"
anchors.fill: parent
}
Column {
anchors.centerIn: parent
spacing: 8
Rectangle {
border.width: 1
border.color: "darkBlue"
color: "#ff7090FF"
width: 60
height: 16
Text { anchors.centerIn: parent; text: "Cut" }
MouseArea { anchors.fill: parent;
onClicked: { edit.cut(); editor.state = "" } }
}
Rectangle {
border.width: 1
border.color: "darkBlue"
color: "#ff7090FF"
width: 60
height: 16
Text { anchors.centerIn: parent; text: "Copy" }
MouseArea { anchors.fill: parent;
onClicked: { edit.copy(); editor.state = "selection" } }
}
Rectangle {
border.width: 1
border.color: "darkBlue"
color: "#ff7090FF"
width: 60
height: 16
Text { anchors.centerIn: parent; text: "Paste" }
MouseArea { anchors.fill: parent;
onClicked: { edit.paste(); edit.cursorPosition = edit.selectionEnd; editor.state = "" } }
}
Rectangle {
border.width: 1
border.color: "darkBlue"
color: "#ff7090FF"
width: 60
height: 16
Text { anchors.centerIn: parent; text: "Deselect" }
MouseArea { anchors.fill: parent;
onClicked: { edit.cursorPosition = edit.selectionEnd; edit.select(edit.cursorPosition,edit.cursorPosition); editor.state = "" } }
}
}
}
}
states: [
State {
name: "selection"
PropertyChanges { target: startHandle; opacity: 1.0 }
PropertyChanges { target: endHandle; opacity: 1.0 }
},
State {
name: "menu"
PropertyChanges { target: startHandle; opacity: 0.5 }
PropertyChanges { target: endHandle; opacity: 0.5 }
PropertyChanges { target: menu; opacity: 1.0 }
}
]
}
|
