DropButton.qml 9.22 KB
Newer Older
dogmaphobic's avatar
dogmaphobic committed
1
import QtQuick                  2.4
Don Gagne's avatar
Don Gagne committed
2 3 4 5 6 7 8 9 10
import QtQuick.Controls         1.2
import QtQuick.Controls.Styles  1.2

import QGroundControl.ScreenTools   1.0
import QGroundControl.Palette       1.0

Item {
    id: _root

11
    signal          clicked()
12 13
    property alias  buttonImage:        roundButton.buttonImage
    property alias  rotateImage:        roundButton.rotateImage
dogmaphobic's avatar
dogmaphobic committed
14
    property real   radius:             ScreenTools.isMobile ? ScreenTools.defaultFontPixelHeight * 1.75 : ScreenTools.defaultFontPixelHeight * 1.25
Don Gagne's avatar
Don Gagne committed
15 16 17
    property int    dropDirection:      dropDown
    property alias  dropDownComponent:  dropDownLoader.sourceComponent
    property real   viewportMargins:    0
18
    property alias  lightBorders:       roundButton.lightBorders
Don Gagne's avatar
Don Gagne committed
19 20 21 22 23 24 25 26 27 28

    width:  radius * 2
    height: radius * 2

    // Should be an enum but that get's into the whole problem of creating a singleton which isn't worth the effort
    readonly property int dropLeft:     1
    readonly property int dropRight:    2
    readonly property int dropUp:       3
    readonly property int dropDown:     4

dogmaphobic's avatar
dogmaphobic committed
29 30 31
    readonly property real _arrowBaseWidth:     radius             // Width of long side of arrow
    readonly property real _arrowPointHeight:   radius * 0.666     // Height is long side to point
    readonly property real _dropCornerRadius:   ScreenTools.defaultFontPixelWidth * 0.5
Don Gagne's avatar
Don Gagne committed
32 33 34 35 36
    readonly property real _dropCornerRadiusX2: _dropCornerRadius * 2
    readonly property real _dropMargin:         _dropCornerRadius
    readonly property real _dropMarginX2:       _dropMargin * 2

    property real   _viewportMaxLeft:   -x + viewportMargins
dogmaphobic's avatar
dogmaphobic committed
37
    property real   _viewportMaxRight:  parent.width  - (viewportMargins * 2) - x
Don Gagne's avatar
Don Gagne committed
38 39 40
    property real   _viewportMaxTop:    -y + viewportMargins
    property real   _viewportMaxBottom: parent.height - (viewportMargins * 2) - y

41 42
    // Set up ExclusiveGroup support. We use the checked property to drive visibility of drop down.

43
    property alias checked: roundButton.checked
44 45 46 47 48 49 50 51 52 53 54
    property ExclusiveGroup exclusiveGroup: null

    onExclusiveGroupChanged: {
        if (exclusiveGroup) {
            exclusiveGroup.bindCheckable(_root)
        }
    }

    function hideDropDown() {
        checked = false
    }
Don Gagne's avatar
Don Gagne committed
55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81

    Component.onCompleted: _calcPositions()

    function _calcPositions() {
        var dropComponentWidth = dropDownLoader.item.width
        var dropComponentHeight = dropDownLoader.item.height
        var dropRectWidth = dropComponentWidth + _dropMarginX2
        var dropRectHeight = dropComponentHeight + _dropMarginX2

        dropItemHolderRect.width = dropRectWidth
        dropItemHolderRect.height = dropRectHeight

        dropDownItem.width = dropComponentWidth + _dropMarginX2
        dropDownItem.height = dropComponentHeight + _dropMarginX2

        if (dropDirection == dropUp || dropDirection == dropDown) {
            dropDownItem.height += _arrowPointHeight

            dropDownItem.x = -(dropDownItem.width / 2) + radius

            dropItemHolderRect.x = 0

            if (dropDirection == dropUp) {
                dropDownItem.y = -(dropDownItem.height + _dropMargin)

                dropItemHolderRect.y = 0
            } else {
82
                dropDownItem.y = roundButton.height + _dropMargin
Don Gagne's avatar
Don Gagne committed
83 84 85 86 87 88 89 90 91

                dropItemHolderRect.y = _arrowPointHeight
            }

            // Validate that dropdown is within viewport
            dropDownItem.x = Math.max(dropDownItem.x, _viewportMaxLeft)
            dropDownItem.x = Math.min(dropDownItem.x + dropDownItem.width, _viewportMaxRight) - dropDownItem.width

            // Arrow points
92
            arrowCanvas.arrowPoint.x = (roundButton.x + radius) - dropDownItem.x
Don Gagne's avatar
Don Gagne committed
93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117
            if (dropDirection == dropUp) {
                arrowCanvas.arrowPoint.y = dropDownItem.height
                arrowCanvas.arrowBase1.x = arrowCanvas.arrowPoint.x - (_arrowBaseWidth / 2)
                arrowCanvas.arrowBase1.y = arrowCanvas.arrowPoint.y - _arrowPointHeight
                arrowCanvas.arrowBase2.x = arrowCanvas.arrowBase1.x + _arrowBaseWidth
                arrowCanvas.arrowBase2.y = arrowCanvas.arrowBase1.y
            } else {
                arrowCanvas.arrowPoint.y = 0
                arrowCanvas.arrowBase1.x = arrowCanvas.arrowPoint.x + (_arrowBaseWidth / 2)
                arrowCanvas.arrowBase1.y = _arrowPointHeight
                arrowCanvas.arrowBase2.x = arrowCanvas.arrowBase1.x - _arrowBaseWidth
                arrowCanvas.arrowBase2.y = arrowCanvas.arrowBase1.y
            }
        } else {
            dropDownItem.width += _arrowPointHeight

            dropDownItem.y = -(dropDownItem.height / 2) + radius

            dropItemHolderRect.y = 0

            if (dropDirection == dropLeft) {
                dropDownItem.x = dropDownItem.width + _dropMargin

                dropItemHolderRect.x = 0
            } else {
118
                dropDownItem.x = roundButton.width + _dropMargin
Don Gagne's avatar
Don Gagne committed
119 120 121 122 123 124 125 126 127

                dropItemHolderRect.x = _arrowPointHeight
            }

            // Validate that dropdown is within viewport
            dropDownItem.y = Math.max(dropDownItem.y, _viewportMaxTop)
            dropDownItem.y = Math.min(dropDownItem.y + dropDownItem.height, _viewportMaxBottom) - dropDownItem.height

            // Arrow points
128
            arrowCanvas.arrowPoint.y = (roundButton.y + radius) - dropDownItem.y
Don Gagne's avatar
Don Gagne committed
129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
            if (dropDirection == dropLeft) {
                arrowCanvas.arrowPoint.x = dropDownItem.width
                arrowCanvas.arrowBase1.x = arrowCanvas.arrowPoint.x - _arrowPointHeight
                arrowCanvas.arrowBase1.y = arrowCanvas.arrowPoint.y - (_arrowBaseWidth / 2)
                arrowCanvas.arrowBase2.x = arrowCanvas.arrowBase1.x
                arrowCanvas.arrowBase2.y = arrowCanvas.arrowBase1.y + _arrowBaseWidth
            } else {
                arrowCanvas.arrowPoint.x = 0
                arrowCanvas.arrowBase1.x = _arrowPointHeight
                arrowCanvas.arrowBase1.y = arrowCanvas.arrowPoint.y - (_arrowBaseWidth / 2)
                arrowCanvas.arrowBase2.x = arrowCanvas.arrowBase1.x
                arrowCanvas.arrowBase2.y = arrowCanvas.arrowBase1.y + _arrowBaseWidth
            }
        }
        arrowCanvas.requestPaint()
    } // function - _calcPositions

    QGCPalette { id: qgcPal }

    MouseArea {
        x:          _viewportMaxLeft
        y:          _viewportMaxTop
        width:      _viewportMaxRight -_viewportMaxLeft
        height:     _viewportMaxBottom - _viewportMaxTop
153
        visible:    checked
154 155 156 157
        onClicked:  {
            checked = false
            _root.clicked()
        }
Don Gagne's avatar
Don Gagne committed
158 159
    }

160 161 162 163 164 165
    RoundButton {
        id:             roundButton
        radius:         parent.width / 2
        onClicked:  {
            _root.clicked()
        }
166
    }
Don Gagne's avatar
Don Gagne committed
167 168 169

    Item {
        id:         dropDownItem
170
        visible:    checked
Don Gagne's avatar
Don Gagne committed
171

Don Gagne's avatar
Don Gagne committed
172
        Canvas {
Don Gagne's avatar
Don Gagne committed
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
            id:             arrowCanvas
            anchors.fill:   parent

            property var arrowPoint: Qt.point(0, 0)
            property var arrowBase1: Qt.point(0, 0)
            property var arrowBase2: Qt.point(0, 0)

            onPaint: {
                var context = getContext("2d")
                context.reset()
                context.beginPath()

                context.moveTo(dropItemHolderRect.x, dropItemHolderRect.y)
                if (dropDirection == dropDown) {
                    context.lineTo(arrowBase2.x, arrowBase2.y)
                    context.lineTo(arrowPoint.x, arrowPoint.y)
                    context.lineTo(arrowBase1.x, arrowBase1.y)
                }
                context.lineTo(dropItemHolderRect.x + dropItemHolderRect.width, dropItemHolderRect.y)
                if (dropDirection == dropLeft) {
                    context.lineTo(arrowBase2.x, arrowBase2.y)
                    context.lineTo(arrowPoint.x, arrowPoint.y)
                    context.lineTo(arrowBase1.x, arrowBase1.y)
                }
                context.lineTo(dropItemHolderRect.x + dropItemHolderRect.width, dropItemHolderRect.y + dropItemHolderRect.height)
                if (dropDirection == dropUp) {
                    context.lineTo(arrowBase2.x, arrowBase2.y)
                    context.lineTo(arrowPoint.x, arrowPoint.y)
                    context.lineTo(arrowBase1.x, arrowBase1.y)
                }
                context.lineTo(dropItemHolderRect.x, dropItemHolderRect.y + dropItemHolderRect.height)
                if (dropDirection == dropRight) {
                    context.lineTo(arrowBase2.x, arrowBase2.y)
                    context.lineTo(arrowPoint.x, arrowPoint.y)
                    context.lineTo(arrowBase1.x, arrowBase1.y)
                }
                context.lineTo(dropItemHolderRect.x, dropItemHolderRect.y)

                context.closePath()
212
                context.fillStyle = qgcPal.windowShade
Don Gagne's avatar
Don Gagne committed
213 214 215 216 217 218 219 220 221 222 223 224 225
                context.fill()
            }
        } // Canvas - arrowCanvas

        Item {
            id:     dropItemHolderRect
            //color:  qgcPal.button
            //radius: _dropCornerRadius

            Loader {
                id: dropDownLoader
                x:  _dropMargin
                y:  _dropMargin
226 227 228 229 230 231 232

                Connections {
                    target: dropDownLoader.item

                    onWidthChanged: _calcPositions()
                    onHeightChanged: _calcPositions()
                }
Don Gagne's avatar
Don Gagne committed
233 234 235 236
            }
        }
    } // Item - dropDownItem
}