How I can use tooltip for QML component.

[Xander84]

The z-index only works for sibling items and the parent, not other items deeper in the item tree and siblings of the parent are not affected by it (sadly), that is why it doesn't work in your code.

[shav]

[quote author="Xander84" date="1396201249"]The z-index only works for sibling items and the parent, not other items deeper in the item tree and siblings of the parent are not affected by it (sadly), that is why it doesn't work in your code.[/quote]

Thanks for the reply! Well I'll try to fix it and upload a new version here tomorrow.

[Xander84]

I could publish my Tooltip version later, it a little bit different :D

[shav]

It's will be grade!

[Xander84]

Ok here you go, maybe that is useful for someone.
I've created a more dynamic tooltip, so usually they are created from JavaScript and not included in the QML layout directly (but can also be done if needed).

Tooltip.qml:
@
import QtQuick 2.2

Rectangle {
id: tooltip

property alias text: tooltipText.text
property alias textItem: tooltipText
property int fadeInDelay: 500
property int fadeOutDelay: 500
property bool autoHide: true
property alias autoHideDelay: hideTimer.interval
property bool destroyOnHide: true

function show() {
    state = "showing"
    if (hideTimer.running) {
        hideTimer.restart()
    }
}

function hide() {
    if (hideTimer.running) {
        hideTimer.stop()
    }
    state = "hidden"
}

width: tooltipText.width + 20
height: tooltipText.height + 10
color: "#dd000000"
radius: 6
opacity: 0

Text {
    id: tooltipText
    anchors.centerIn: parent
    horizontalAlignment: Text.AlignHCenter
    color: "white"
    font.pointSize: 10
    font.bold: true
}

MouseArea {
    anchors.fill: parent
    onClicked: hide()
}

Timer {
    id: hideTimer
    interval: 5000
    onTriggered: hide()
}

states: [
    State {
        name: "showing"
        PropertyChanges { target: tooltip; opacity: 1 }
        onCompleted: {
            if (autoHide) {
                hideTimer.start()
            }
        }
    },
    State {
        name: "hidden"
        PropertyChanges { target: tooltip; opacity: 0 }
        onCompleted: {
            if (destroyOnHide) {
                tooltip.destroy()
            }
        }
    }
]

transitions: [
    Transition {
        to: "showing"
        NumberAnimation { target: tooltip; property: "opacity"; duration: fadeInDelay }
    },
    Transition {
        to: "hidden"
        NumberAnimation { target: tooltip; property: "opacity"; duration: fadeOutDelay }
    }
]

}
@
The tooltip has a show and hide function to fade it in and out respectively, by default it will destroy itself after it's hidden (the destroyOnHide property can be set to false if you don't want that).

Also I have a simple JavaScript file to make it a little easier to create tooltips.

TooltipCreator.js
@
var component = Qt.createComponent("Tooltip.qml");

function create(text, parent, properties) {
if (typeof properties === "undefined") {
properties = {
anchors: {
horizontalCenter: parent.horizontalCenter,
bottom: parent.bottom,
bottomMargin: parent.height / 8
}
};
}
properties.text = text;
var tooltip = component.createObject(parent, properties);
if (tooltip === null) {
console.error("error creating tooltip: " + component.errorString());
} else if (properties.anchors) {
// manual anchor mapping necessary
for (var anchor in properties.anchors) {
tooltip.anchors[anchor] = properties.anchors[anchor];
}
}
return tooltip;
}
@
manual anchor mapping was necessary because it didn't work with Component.createObject properties!? I don't know if that is a bug or an error on my side.

so I use that TooltipCreator like this for example:
@
import "TooltipCreator.js" as TooltipCreator
...
TooltipCreator.create("text on the tooltip", parentItem).show()
@
by default it will fade in, stay visible for 5 seconds and than fade out and destroy itself, the user can click on the tooltip to hide it immediately, also it will be anchored at the bottom center of the provided parent Item (see the TooltipCreator.js)

The 3rd optional argument can be used to specify custom properties for the tooltip, e.g.
@
TooltipCreator.create("absolute positioned tooltip"), rootItem, { x: 100, y: 50 }).show()
@
or set the properties on the item directly
@
var tooltip = TooltipCreator.create(qsTr("Network Error!\nPlease check your network connection\nor try again later."), mainView)
tooltip.color = "#ddff0000"
tooltip.textItem.color = "white"
tooltip.show()
@

I hope that helps, it's not perfect but an easy way to show a simple tooltip I think.

[Eddy]

Thanks for sharing Xander!

Are you interested in putting it in a wiki page ?

We can help you with that if you haven't done it yet. Just let us know.

BTW : thanks for all your contributions on Devnet. We are really happy having you on board!!!

[shav]

[quote author="Eddy" date="1396255883"]
Are you interested in putting it in a wiki page ?
[/quote]

Hi,

I want to do it but I don't know how I can do it. Could you help me with it. I want to create two version of ToolTip. The one is from the Xander84 and one is a my if you don't mind.

The new version of my ToolTip looks like:
@
import QtQuick 2.0
import QtQuick.Controls 1.1
import QtGraphicalEffects 1.0

Item {
id: toolTipRoot
width: toolTip.contentWidth
height: toolTipContainer.height
visible: false
clip: false
z: 999999999

property alias text: toolTip.text
property alias radius: content.radius
property alias backgroundColor: content.color
property alias textColor: toolTip.color
property alias font: toolTip.font
property var target: null

function onMouseHover(x, y)
{
    var obj = toolTipRoot.target.mapToItem(null, x, y);
    toolTipRoot.x = obj.x;
    toolTipRoot.y = obj.y;
}

function onVisibleStatus(flag)
{
    toolTipRoot.visible = flag;
}

Component.onCompleted: {
    var itemParent = toolTipRoot.target;

    var newObject = Qt.createQmlObject('import QtQuick 2.0; MouseArea {signal mouserHover(int x, int y); signal showChanged(bool flag); anchors.fill:parent; hoverEnabled: true; onPositionChanged: {mouserHover(mouseX, mouseY)} onEntered: {showChanged(true)} onExited:{showChanged(false)}}',
        itemParent, "mouseItem");
    newObject.mouserHover.connect(onMouseHover);
    newObject.showChanged.connect(onVisibleStatus);
}

Item {
    id: toolTipContainer
    z: toolTipRoot.z + 1
    width: content.width + (2*toolTipShadow.radius)
    height: content.height + (2*toolTipShadow.radius)

    Rectangle {
        id: content
        anchors.centerIn: parent
        width: toolTipRoot.width
        height: toolTip.contentHeight + 10
        radius: 3

        Text {
            id: toolTip
            anchors {fill: parent; margins: 5}
            wrapMode: Text.WrapAnywhere
        }
    }
}

DropShadow {
    id: toolTipShadow
    z: toolTipRoot.z + 1
    anchors.fill: source
    cached: true
    horizontalOffset: 4
    verticalOffset: 4
    radius: 8.0
    samples: 16
    color: "#80000000"
    smooth: true
    source: toolTipContainer
}

Behavior on visible { NumberAnimation { duration: 200 }}

}
@

I think the Xander84 version looks more standard. And I think it's will be great if other developers could have a more variants of implementation the tooltip.

[quote author="Eddy" date="1396255883"]
BTW : thanks for all your contributions on Devnet. We are really happy having you on board!!![/quote]

Thanks! I'm happy be with you on board. I'll want to thank you for your hard work on Qt.

[Eddy]

bq. I want to do it but I don’t know how I can do it. Could you help me with it.

Have a look at :
"How to add wiki pages":http://qt-project.org/wiki/WikiHelp

PS: let Xander decide on his code, since he's the author.

[shav]

Thanks for the link to documentation. I'll check it.

[quote author="Eddy" date="1396263262"]PS: let Xander decide on his code, since he's the author.[/quote]

Sure, I'll wait the Xander answer.

[Xander84]

hey, sure you can post it on the wiki if you like, feel free to use the code.

maybe I will release some more QML code or apps in the future, actually I just started using QML some month ago and released my first app a week ago, if anybody is interested how it looks on Android: https://play.google.com/store/apps/details?id=ws.aggregator.critiq

and thanks Eddy, I like to contribute to the community :)

[shav]

Hi,

I've created the wiki page "QtQuick_ToolTip_Component":http://qt-project.org/wiki/QtQuick_ToolTip_Component So please read this and if you found any mistakes let me know by email.

Thanks for the help.

[Eddy]

@shav

Thanks, i'll have a look at it.

[Eddy]

@xander

bq. actually I just started using QML some month ago and released my first app a week ago, if anybody is interested how it looks on Android: https://play.google.com/store/apps/details?id=ws.aggregator.critiq

looks very nice, cool color choice!

[Timmmm]

I took a different approach and tried creating an actual tooltip window. It works pretty well but there are some flaws. See the code:
@
import QtQuick 2.2
import QtQuick.Window 2.1
import QtGraphicalEffects 1.0

// Simple tooltip. There are some flaws:

// 1. When the tooltip is shown the main window loses focus! There's no way around that currently.
// 2. Each tooltip has its own window - so if your app has 100 tooltips there will always be
// 100 (hidden) windows open. Probably not great for performance.
// 3. You need to provide it with your main window coordinates via mainWindowX and mainWindowY.
// this is because there is no way to get screen coordinates in QML currently.

MouseArea {

hoverEnabled: true

property alias text: content.text

// You must alias these to the main window positions.
property int mainWindowX
property int mainWindowY

property int xOffset: 20
property int yOffset: 5

onEntered: {
window.visible = true;
}

onExited: {
window.visible = false;
}

Window {
id: window
flags: Qt.ToolTip | Qt.FramelessWindowHint | Qt.WA_TranslucentBackground | Qt.WindowDoesNotAcceptFocus
color: "#00000000"

width: frame.width + 5 // Space for drop shadow.
height: frame.height + 5

x: mapToItem(null, mouseX, mouseY).x + mainWindowX + xOffset
y: mapToItem(null, mouseX, mouseY).y + mainWindowY + yOffset

Rectangle {
id: frame
width: content.contentWidth + 10 // Padding for text.
height: content.contentHeight + 10

color: "#f3f2a5"
border.width: 1
border.color: "#bebebe"

Text {
id: content
anchors.centerIn: parent
}
}
DropShadow {
anchors.fill: frame
horizontalOffset: 3
verticalOffset: 3
radius: 5
samples: 16
color: "#80000000"
source: frame
cached: true
fast: true // This looks better for some reason.
transparentBorder: true // Required. But there's no documentation so I don't know why.
}
}
}
@
QML is not mature enough to do this in a bug-free way yet. If you want it to work well you will have to write a C++ component, which is not too difficult. However, I'm reasonably happy with the above code so I'll wait until the trolls write an official implementation I think.

[Aralox]

Hey guys,
I was happy enough with the tooltip that came with "Button.qml":http://qt-project.org/doc/qt-5/qml-qtquick-controls-button.html#tooltip-prop, so I extracted the relevant parts from its source code (located in C:\Qt\5.3\msvc2013_64\qml\QtQuick\Controls\Private for me) and used it, instead of a custom solution.

Here is a minimal example:

@ import QtQuick 2.2
import QtQuick.Controls 1.2
import QtQuick.Controls.Styles 1.1
import QtQuick.Controls.Private 1.0

Label {

property string tooltip: "hello"

MouseArea {
id: behavior

anchors.fill: parent
hoverEnabled: true

onExited: Tooltip.hideText()
onCanceled: Tooltip.hideText()

Timer {
interval: 1000
running: behavior.containsMouse && tooltip.length
onTriggered: Tooltip.showText(behavior, Qt.point(behavior.mouseX, behavior.mouseY), tooltip)
}
}

}@

I did like the solutions by shav and Xander, but didn't really want to roll a custom solution unless I really needed to.

[webmaster128]

I'd love to here your opinion on this approach:

https://www.kullo.net/blog/tooltiparea-the-missing-tooltip-component-of-qt-quick/