93 lines
2.1 KiB
QML
93 lines
2.1 KiB
QML
import QtQuick 2.0
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import QtQuick.Controls 2.0
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import QtQuick.Layouts 1.0
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import QtQuick.Controls.Material 2.0
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Rectangle {
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id: control
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property string value: ""
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property string currentColor: rgbToHex(redSlider.value, greenSlider.value, blueSlider.value)
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property bool isDarkColor: control.checkIsDarkColor(value)
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onValueChanged: {
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var rgb = hexToRgb(value)
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redSlider.value = rgb.r
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greenSlider.value = rgb.g
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blueSlider.value = rgb.b
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}
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onCurrentColorChanged: {
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value = currentColor
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}
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function rgbToHex(r, g, b) {
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return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
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}
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function hexToRgb(hex) {
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var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
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return result ? {
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r: parseInt(result[1], 16),
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g: parseInt(result[2], 16),
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b: parseInt(result[3], 16)
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} : null;
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}
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function checkIsDarkColor(color) {
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var rgb = hexToRgb(color)
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var luma = 0.2126 * rgb.r + 0.7152 * rgb.g + 0.0722 * rgb.b; // per ITU-R BT.709
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return luma < 50
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}
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ColumnLayout {
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anchors.fill: parent
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Pane {
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Layout.fillWidth: true
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Layout.preferredHeight: parent.height * 0.5
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Material.background: control.currentColor
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Material.elevation: 5
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}
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Slider {
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id: redSlider
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Layout.fillWidth: true
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Layout.fillHeight: true
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from: 0
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to: 255
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stepSize: 1
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Material.accent: Material.Red
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}
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Slider {
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id: greenSlider
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Layout.fillWidth: true
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Layout.fillHeight: true
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from: 0
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to: 255
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stepSize: 1
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Material.accent: Material.Green
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}
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Slider {
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id: blueSlider
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Layout.fillWidth: true
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Layout.fillHeight: true
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from: 0
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to: 255
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stepSize: 1
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Material.accent: Material.Blue
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}
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}
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}
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