内容

特性
方法
详细描述

RangeSlider QML 类型

用于通过沿轨道滑动 2 手柄来选择值范围。更多...

导入语句：	import QtQuick.Controls 2.2
Since:	Qt 5.7
继承：	Control

所有成员列表，包括继承成员

特性

first
- first.value : real
- first.position : real
- first.visualPosition : real
- first.handle : Item
- first.pressed : bool
- first.hovered : bool
from : real
live : bool
orientation : enumeration
second
- second.value : real
- second.position : real
- second.visualPosition : real
- second.handle : Item
- second.pressed : bool
- second.hovered : bool
snapMode : enumeration
stepSize : real
to : real

方法

void first.decrease ()
void first.increase ()
void second.decrease ()
void second.increase ()
void setValues (real firstValue , real secondValue )

详细描述

RangeSlider is used to select a range specified by two values, by sliding each handle along a track.

在以下范例中，自定义 from and to values are set, and the initial positions of the first and second handles are set:

RangeSlider {
    from: 1
    to: 100
    first.value: 25
    second.value: 75
}

In order to perform an action when the value for a particular handle changes, use the following syntax:

first.onValueChanged: console.log("first.value changed to " + first.value)

first.position and second.position properties are expressed as fractions of the control's size, in the range 0.0 - 1.0 。 first.visualPosition and second.visualPosition properties are the same, except that they are reversed in a right-to-left application. The visualPosition is useful for positioning the handles when styling RangeSlider . In the example above, first.visualPosition 将是 0.24 in a left-to-right application, and 0.76 in a right-to-left application.

另请参阅 Customizing RangeSlider and 输入控件 .

特性文档编制

first group
first.value : real
first.position : real
first.visualPosition : real
first.handle : Item
first.pressed : bool
first.hovered : bool

特性	描述
值	This property holds the value of the first handle in the range `from` - `to` . 若 from 大于 to , the value of the first handle must be greater than the second, and vice versa. 默认值为 `0.0` .
handle	This property holds the first handle item.
visualPosition	This property holds the visual position of the first handle. The position is expressed as a fraction of the control's size, in the range `0.0 - 1.0` . When the control is mirrored , the value is equal to `1.0 - position` . This makes the value suitable for visualizing the slider, taking right-to-left support into account.
位置	This property holds the logical position of the first handle. The position is expressed as a fraction of the control's size, in the range `0.0 - 1.0` . For visualizing a slider, the right-to-left aware visualPosition should be used instead.
pressed	This property holds whether the first handle is pressed.
hovered	This property holds whether the first handle is hovered. This property was introduced in QtQuick .Controls 2.1.

另请参阅 first.increase() and first.decrease() .

from : real

This property holds the starting value for the range. The default value is 0.0 .

另请参阅 to , first.value ，和 second.value .

live : bool

This property holds whether the slider provides live updates for the first.value and second.value properties while the respective handles are dragged.

默认值为 true .

This QML property was introduced in QtQuick.Controls 2.2 (Qt 5.9).

另请参阅 first.value and second.value .

orientation : enumeration

This property holds the orientation.

可能的值：

常量	描述
`Qt.Horizontal`	Horizontal (default)
`Qt.Vertical`	Vertical

second group
second.value : real
second.position : real
second.visualPosition : real
second.handle : Item
second.pressed : bool
second.hovered : bool

特性	描述
值	This property holds the value of the second handle in the range `from` - `to` . 若 from 大于 to , the value of the first handle must be greater than the second, and vice versa. 默认值为 `0.0` .
handle	This property holds the second handle item.
visualPosition	This property holds the visual position of the second handle. The position is expressed as a fraction of the control's size, in the range `0.0 - 1.0` . When the control is mirrored , the value is equal to `1.0 - position` . This makes the value suitable for visualizing the slider, taking right-to-left support into account.
位置	This property holds the logical position of the second handle. The position is expressed as a fraction of the control's size, in the range `0.0 - 1.0` . For visualizing a slider, the right-to-left aware visualPosition should be used instead.
pressed	This property holds whether the second handle is pressed.
hovered	This property holds whether the second handle is hovered. This property was introduced in QtQuick .Controls 2.1.

另请参阅 second.increase() and second.decrease() .

snapMode : enumeration

This property holds the snap mode.

可能的值：

常量	描述
`RangeSlider.NoSnap`	The slider does not snap (default).
`RangeSlider.SnapAlways`	The slider snaps while the handle is dragged.
`RangeSlider.SnapOnRelease`	The slider does not snap while being dragged, but only after the handle is released.

For visual explanations of the various modes, see the snapMode documentation of Slider .

另请参阅 stepSize .

stepSize : real

This property holds the step size. The default value is 0.0 .

另请参阅 snapMode , first.increase() ，和 first.decrease() .

to : real

This property holds the end value for the range. The default value is 1.0 .

另请参阅 from , first.value ，和 second.value .

方法文档编制

void first.decrease ()

Decreases the value of the handle by stepSize ，或 0.1 if stepSize is not defined.

另请参阅 first .

void first.increase ()

Increases the value of the handle by stepSize ，或 0.1 if stepSize is not defined.

另请参阅 first .

void second.decrease ()

Decreases the value of the handle by stepSize ，或 0.1 if stepSize is not defined.

另请参阅 second .

void second.increase ()

Increases the value of the handle by stepSize ，或 0.1 if stepSize is not defined.

另请参阅 second .

void setValues ( real firstValue , real secondValue )

集 first.value and second.value with the given arguments.

若 to is larger than from and firstValue is larger than secondValue , firstValue will be clamped to secondValue .

若 from is larger than to and secondValue is larger than firstValue , secondValue will be clamped to firstValue .

This function may be necessary to set the first and second values after the control has been completed, as there is a circular dependency between firstValue and secondValue which can cause assigned values to be clamped to each other.

另请参阅 stepSize .