Kontroller och interaktiva element

Kirigami erbjuder ett stort urval av olika interaktiva element som du kan använda i dina program. Varje olika typ har något olika interaktionsstilar, visuella stilar och funktioner. Att använda rätt typ av kontroll i dina program hjälper till att göra ditt användargränssnitt mer mottagligt och intuitiv.

Knappar

In Kirigami apps, we use buttons from QtQuick Controls. Using them is pretty straightforward: we set the text to the text property and any action we want it to perform is set to the onClicked property.

import QtQuick 2.15
import QtQuick.Controls 2.15 as Controls
import QtQuick.Layouts 1.15
import org.kde.kirigami 2.20

Kirigami.Page {

    Controls.Button {
        text: "Beep!"
        onClicked: showPassiveNotification("Boop!")
    }

}

Ändringsbara knappar

The behavior of buttons can be changed to make them toggleable: in this mode, they will stay pressed until clicked on once more. This mode can be activated by setting their checkable property to true; we can also set buttons to be toggled on by default by setting checked to true.

We can get the most out of toggleable buttons by using the onCheckedChanged signal handler which is automatically generated from the checked signal. It works similarly to onClicked, except here the assigned action will be executed when the button's state changes. It is a boolean property, which can come in handy for specific use cases.

In this example, we set the visibility of an inline drawer according to the status of a toggleable button:

Controls.Button {
    text: "Toggle!!"
    checkable: true
    checked: true
    onCheckedChanged: myDrawer.visible = checked
}

Kirigami.OverlayDrawer {
    id: myDrawer
    edge: Qt.BottomEdge
    modal: false

    contentItem: Controls.Label {
        text: "Peekaboo!"
    }
}

Verktygsradsknappar

There is a specific button type meant for use in toolbars, Controls.ToolButton . The most obvious difference between this and a conventional Button is the styling, with toolbuttons being flat (though this is alterable with the boolean property flat).

Controls.ToolButton {
    text: "Tool beep..."
    onClicked: showPassiveNotification("Tool boop!")
}

Urvalskontroller

Urvalskontroller låter användare göra ett val eller välja ett alternativ. Det finns olika typer som är bäst lämpade i olika situationer.

Kryssrutor

A Controls.CheckBox is meant for options where the choices are non-exclusive and where each option has a clear alternative.

Controls.CheckBox {
    text: "Beep!"
    checked: true
}
Controls.CheckBox {
    text: "Boop!"
    checked: false
}

As you can see, they are simple to use. The checked property holds a boolean value determining whether or not they have been checked.

Alternativknappar

A Controls.RadioButton is designed for situations where the user must choose one option from a set of several options.

Alternativknappar är normalt exklusiva: bara en knapp i samma överliggande objekt kan markeras.

Like checkboxes, they can be set to be checked or unchecked by default with the checked property.

ColumnLayout {
    Controls.RadioButton {
        text: "Tick!"
        checked: true
    }
    Controls.RadioButton {
        text: "Tock!"
        checked: false
    }
}

Omkopplare

On the desktop, changing settings usually involves changing the setting and then applying it by clicking on an "Apply" or "OK" button. On mobile, we can use a Controls.Switch instead.

Switches can be toggled between an on and off state. They can be toggled by clicking or tapping on them, or they can be dragged towards the on or off position. Once again, switches can be set to be on or off by default with the checked property.

Controls.Switch {
    text: "Switchy"
    checked: true
}
Controls.Switch {
    text: "Swootchy"
    checked: false
}

Skjutreglage

Sliders allow users to select certain values by sliding a handle along a track. There are several types that you can choose from depending on the values you'd like your users to choose in your application.

Vanliga och streckmarkerade skjutreglage

A standard Controls.Slider provides the user with very fine control over the selection they wish to make.

In Left to Right mode, sliders go left to right to increase when in horizontal orientation, while in Right to Left mode they go in the reverse direction. In both modes, sliders in vertical orientation go from the bottom up.

The coloration provides a visual indicator of how large the value you are selecting is.

Skjutreglage har några viktiga egenskaper som vi måste ta hänsyn till:

• value: contains the value at which the handle is placed, and can also be set manually to provide a default starting value
• to: defines the range of the slider by specifying the maximum value it can go to
• orientation: allows the slider to be set to a vertical orientation with Qt.Vertical

Controls.Slider {
    id: normalSlider
    orientation: Qt.Vertical
    value: 5.0
    to: 10.0
}

Another useful property we can use is stepSize. Setting this to a numerical value allows us to create a slider that snaps onto values that are multiples of the specified stepSize, with these multiples being indicated by tickmarks. Therefore if we set this property to 2.0, when the user drags the slider handle, they will only be able to select 0.0, 2.0, 4.0, etc. up to the value specified in the to property.

Controls.Slider {
    id: tickmarkedSlider
    value: 6.0
    to: 10.0
    stepSize: 2.0
}

Range sliders

QtQuick Controls also provides Controls.RangeSliders . These have two handles, hence allowing you to define a range of numbers between the two handles.

Two new properties are important to keep in mind: first.value and second.value, which hold the values of the two handles. Like the value property of the standard sliders, these can be pre-set.

Controls.RangeSlider {
    id: rangeSlider
    to: 10.0
    first.value: 3.0
    second.value: 6.0
}

We can also make it a tickmarked slider by setting the stepSize property value to a number, in the exact same way as a standard slider.

Controls.RangeSlider {
    id: rangeTickmarkedSlider
    to: 10.0
    first.value: 4.0
    second.value: 6.0
    stepSize: 2.0
}