UIStyle.qml Example File

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 import QtQuick 2.12

 pragma Singleton

 QtObject {
     id: uiStyle

     // Font Sizes
     readonly property int fontSizeXXS: 10
     readonly property int fontSizeXS: 15
     readonly property int fontSizeS: 20
     readonly property int fontSizeM: 25
     readonly property int fontSizeL: 30
     readonly property int fontSizeXL: 35
     readonly property int fontSizeXXL: 40

     // Color Scheme
     // Green
     readonly property color colorQtPrimGreen: "#41cd52"
     readonly property color colorQtAuxGreen1: "#21be2b"
     readonly property color colorQtAuxGreen2: "#17a81a"

     // Red
     readonly property color colorRed: "#e6173d"

     // Gray
     readonly property color colorQtGray1: "#09102b"
     readonly property color colorQtGray2: "#222840"
     readonly property color colorQtGray3: "#3a4055"
     readonly property color colorQtGray4: "#53586b"
     readonly property color colorQtGray5: "#53586b"
     readonly property color colorQtGray6: "#848895"
     readonly property color colorQtGray7: "#9d9faa"
     readonly property color colorQtGray8: "#b5b7bf"
     readonly property color colorQtGray9: "#cecfd5"
     readonly property color colorQtGray10: "#f3f3f4"

     // Light/dark versions of the colors above.
     // Some UI elements always use a specific color regardless of theme,
     // which is why we have both sets: so that those elements don't need to hard-code the hex string.
     readonly property color themeColorQtGray1: darkTheme ? colorQtGray10 : colorQtGray1
     readonly property color themeColorQtGray2: darkTheme ? colorQtGray9 : colorQtGray2
     readonly property color themeColorQtGray3: darkTheme ? colorQtGray8 : colorQtGray3
     readonly property color themeColorQtGray4: darkTheme ? colorQtGray7 : colorQtGray4
     readonly property color themeColorQtGray5: darkTheme ? colorQtGray6 : colorQtGray5
     readonly property color themeColorQtGray6: darkTheme ? colorQtGray5 : colorQtGray6
     readonly property color themeColorQtGray7: darkTheme ? colorQtGray4 : colorQtGray7
     readonly property color themeColorQtGray8: darkTheme ? colorQtGray3 : colorQtGray8
     readonly property color themeColorQtGray9: darkTheme ? colorQtGray2 : colorQtGray9
     readonly property color themeColorQtGray10: darkTheme ? colorQtGray1 : colorQtGray10

     property bool darkTheme: false

     function themeImagePath(baseImagePath) {
         return baseImagePath + (darkTheme ? "-dark" : "-light") + ".png"
     }
 }