《QT实用小工具·三十九》仿 Windows10 画图3D 的颜色选择器, 但更加强大

1、概述
源码放在文章末尾

该项目实现了仿 Windows10 画图3D 的颜色选择器，功能更加丰富更加强大。

项目部分代码如下所示：

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.15
import QtGraphicalEffects 1.15

Item {
    id: root
    width: 460
    height: 500
    scale: 0
    opacity: 0
    enabled: false

    property bool movable: true
    property alias title: contentText.text
    property color initColor: "white"
    readonly property color currentColor: pickerRect.currentColor

    onInitColorChanged: pickerRect.setColor(initColor);

    signal accepted();
    signal rejected();

    function open() {
        focus = true;
        enabled = true;
    }

    function hide() {
        focus = false;
        enabled = false;
    }

    Keys.onEscapePressed: cancelButton.clicked();

    NumberAnimation on scale {
        running: root.enabled
        duration: 350
        easing.type: Easing.OutBack
        easing.overshoot: 1.0
        to: 1.0
    }

    NumberAnimation on opacity {
        running: root.enabled
        duration: 300
        easing.type: Easing.OutQuad
        to: 1.0
    }

    NumberAnimation on scale {
        running: !root.enabled
        duration: 300
        easing.type: Easing.InBack
        easing.overshoot: 1.0
        to: 0.0
    }

    NumberAnimation on opacity {
        running: !root.enabled
        duration: 250
        easing.type: Easing.OutQuad
        to: 0.0
    }

    RectangularGlow {
        width: parent.width + 4
        height: parent.height + 4
        anchors.centerIn: parent
        glowRadius: 4
        spread: 0.2
        color: "#206856E6"
        cornerRadius: 4
    }

    Rectangle {
        anchors.fill: parent
        color: "#f6f6f6"
        border.color: "#aea4ee"
    }

    MouseArea {
        anchors.fill: parent
        enabled: root.movable

        property point startPos: Qt.point(0, 0)
        property point offsetPos: Qt.point(0, 0)

        onClicked: (mouse) => mouse.accepted = false;
        onPressed: (mouse) => {
            startPos = Qt.point(mouse.x, mouse.y);
            cursorShape = Qt.SizeAllCursor;
        }
        onReleased: (mouse) => {
            startPos = Qt.point(mouse.x, mouse.y);
            cursorShape = Qt.ArrowCursor;
        }
        onPositionChanged: (mouse) => {
            if (pressed) {
                offsetPos = Qt.point(mouse.x - startPos.x, mouse.y - startPos.y);
                root.x = root.x + offsetPos.x;
                root.y = root.y + offsetPos.y;
            }
        }

        Text {
            id: contentText
            height: 20
            anchors.top: parent.top
            anchors.topMargin: 15
            anchors.left: parent.left
            anchors.leftMargin: 25
            anchors.right: parent.right
            font.family: "微软雅黑"
            color: "#222255"
            text: qsTr("选择新颜色")
            antialiasing: true
            verticalAlignment: Text.AlignVCenter
        }

        Item {
            id: pickerRect
            width: 330
            height: 290
            anchors.top: contentText.bottom
            anchors.left: contentText.left
            anchors.leftMargin: -cursorWidth * 0.5

            property real cursorWidth: 30
            property color hueColor: {
                let v = 1.0 - hueSlider.value;

                if (0.0 <= v && v < 0.16) {
                    return Qt.rgba(1.0, 0.0, v / 0.16, 1.0);
                } else if (0.16 <= v && v < 0.33) {
                    return Qt.rgba(1.0 - (v - 0.16) / 0.17, 0.0, 1.0, 1.0);
                } else if (0.33 <= v && v < 0.5) {
                    return Qt.rgba(0.0, ((v - 0.33) / 0.17), 1.0, 1.0);
                } else if (0.5 <= v && v < 0.76) {
                    return Qt.rgba(0.0, 1.0, 1.0 - (v - 0.5) / 0.26, 1.0);
                } else if (0.76 <= v && v < 0.85) {
                    return Qt.rgba((v - 0.76) / 0.09, 1.0, 0.0, 1.0);
                } else if (0.85 <= v && v <= 1.0) {
                    return Qt.rgba(1.0, 1.0 - (v - 0.85) / 0.15, 0.0, 1.0);
                } else {
                    return "red";
                }
            }
            property real saturation: colorPickerCursor.x / (width - cursorWidth)
            property real brightness: 1 - colorPickerCursor.y / (height - cursorWidth)
            property color currentColor: Qt.hsva(hueSlider.value, saturation, brightness, alphaSlider.value)
            property color __color: Qt.rgba(0, 0, 0, 0)

            function setColor(color) {
                alphaSlider.x = alphaPicker.width == 0 ? 0 : (alphaPicker.width - alphaSlider.width) * color.a;
                hueSlider.x = (huePicker.width - hueSlider.width) * (Math.max(color.hsvHue, 0));
                colorPickerCursor.x = color.hsvSaturation * (width - cursorWidth);
                colorPickerCursor.y = (1.0 - color.hsvValue) * (height - cursorWidth);
            }

            function fromColor() {
                pickerRect.setColor(Qt.rgba(parseInt(redEditor.text) / 255.
                                            , parseInt(greenEditor.text) / 255.
                                            , parseInt(blueEditor.text) / 255.
                                            , parseInt(alphaEditor.text) / 255.));
            }

            function fromArgbColor() {
                __color = '#' + argbEditor.text;
                pickerRect.setColor(__color);
            }

            onCurrentColorChanged: {
                redEditor.text = (currentColor.r * 255).toFixed(0);
                greenEditor.text = (currentColor.g * 255).toFixed(0);
                blueEditor.text = (currentColor.b * 255).toFixed(0);
                alphaEditor.text = (currentColor.a * 255).toFixed(0);
                argbEditor.text = currentColor.toString().replace("#", "");
            }

            Rectangle {
                x: pickerRect.cursorWidth * 0.5
                y: pickerRect.height - pickerRect.cursorWidth * 0.5
                width: pickerRect.height - pickerRect.cursorWidth
                height: pickerRect.width - pickerRect.cursorWidth
                rotation: -90
                transformOrigin: Item.TopLeft
                gradient: Gradient {
                    GradientStop { position: 0.0; color: "white" }
                    GradientStop { position: 1.0; color: pickerRect.hueColor }
                }
            }

            Rectangle {
                x: pickerRect.cursorWidth * 0.5
                y: pickerRect.cursorWidth * 0.5
                width: pickerRect.width - pickerRect.cursorWidth
                height: pickerRect.height - pickerRect.cursorWidth
                gradient: Gradient {
                    GradientStop { position: 1.0; color: "#ff000000" }
                    GradientStop { position: 0.0; color: "#00000000" }
                }
            }

            Rectangle {
                id: colorPickerCursor
                width: pickerRect.cursorWidth
                height: pickerRect.cursorWidth
                border.color: "#e6e6e6"
                border.width: 1
                color: pickerRect.currentColor

                Behavior on scale { NumberAnimation { easing.type: Easing.OutBack; duration: 300 } }

                Rectangle {
                    anchors.fill: parent
                    anchors.margins: 1
                    color: "transparent"
                    border.color: "white"
                    border.width: 1
                }
            }

            MouseArea {
                x: pickerRect.cursorWidth
                y: pickerRect.cursorWidth
                anchors.fill: parent

                function handleCursorPos(x, y) {
                    let halfWidth = pickerRect.cursorWidth * 0.5;
                    colorPickerCursor.x = Math.max(0, Math.min(width , x + halfWidth) - pickerRect.cursorWidth);
                    colorPickerCursor.y = Math.max(0, Math.min(height, y + halfWidth) - pickerRect.cursorWidth);
                }

                onPositionChanged: (mouse) => handleCursorPos(mouse.x, mouse.y);
                onPressed: (mouse) => {
                    colorPickerCursor.scale = 0.7;
                    handleCursorPos(mouse.x, mouse.y);
                }
                onReleased: colorPickerCursor.scale = 1.0;
            }
        }

        Item {
            id: previewItem
            width: 90
            height: 90
            anchors.left: pickerRect.right
            anchors.leftMargin: 10
            anchors.top: contentText.bottom
            anchors.topMargin: 15

            Grid {
                id: previwBackground
                anchors.fill: parent
                rows: 11
                columns: 11
                clip: true

                property real cellWidth: width / columns
                property real cellHeight: height / rows

                Repeater {
                    model: parent.columns * parent.rows

                    Rectangle {
                        width: previwBackground.cellWidth
                        height: width
                        color: (index % 2 == 0) ? "gray" : "transparent"
                    }
                }
            }

            Rectangle {
                anchors.fill: parent
                anchors.margins: -2
                color: pickerRect.currentColor
                border.color: "#e6e6e6"
                border.width: 2
            }
        }

        component ColorEditor: ColumnLayout {
            id: __layout
            width: previewItem.width
            height: 50

            property alias label: label.text
            property alias text: input.text
            property alias validator: input.validator

            signal textEdited();
            signal accepted();

            Text {
                id: label
                font.family: "微软雅黑"
                color: "#222255"
                verticalAlignment: Text.AlignVCenter
                Layout.fillWidth: true
            }

            Rectangle {
                clip: true
                color: "transparent"
                border.color: "#e6e6e6"
                border.width: 2
                Layout.fillHeight: true
                Layout.fillWidth: true

                TextInput {
                    id: input
                    leftPadding: 10
                    rightPadding: 10
                    selectionColor: "#398ed4"
                    selectByMouse: true
                    anchors.fill: parent
                    horizontalAlignment: TextInput.AlignRight
                    verticalAlignment: TextInput.AlignVCenter
                    onTextEdited: __layout.textEdited();
                    onAccepted: __layout.accepted();
                }
            }
        }

        Column {
            anchors.top: previewItem.bottom
            anchors.topMargin: 10
            anchors.left: previewItem.left
            spacing: 6

            ColorEditor {
                id: redEditor
                label: "红色"
                validator: IntValidator { top: 255; bottom: 0 }
                onAccepted: pickerRect.fromColor();
            }

            ColorEditor {
                id: greenEditor
                label: "绿色"
                validator: IntValidator { top: 255; bottom: 0 }
                onAccepted: pickerRect.fromColor();
            }

            ColorEditor {
                id: blueEditor
                label: "蓝色"
                validator: IntValidator { top: 255; bottom: 0 }
                onAccepted: pickerRect.fromColor();
            }

            ColorEditor {
                id: alphaEditor
                label: "透明度"
                validator: IntValidator { top: 255; bottom: 0 }
                onAccepted: pickerRect.fromColor();
            }

            ColorEditor {
                id: argbEditor
                label: "十六进制 (ARGB)"
                validator: RegularExpressionValidator { regularExpression: /[0-9a-fA-F]{0,8}/ }
                onAccepted: pickerRect.fromArgbColor();
            }
        }

        Rectangle {
            id: huePicker
            width: pickerRect.width - pickerRect.cursorWidth
            height: 32
            anchors.top: pickerRect.bottom
            anchors.topMargin: 10
            anchors.left: contentText.left
            gradient: Gradient {
                orientation: Gradient.Horizontal
                GradientStop { position: 0.0;  color: "#ff0000" }
                GradientStop { position: 0.16; color: "#ffff00" }
                GradientStop { position: 0.33; color: "#00ff00" }
                GradientStop { position: 0.5;  color: "#00ffff" }
                GradientStop { position: 0.76; color: "#0000ff" }
                GradientStop { position: 0.85; color: "#ff00ff" }
                GradientStop { position: 1.0;  color: "#ff0000" }
            }

            Rectangle {
                id: hueSlider
                width: height
                height: parent.height
                anchors.verticalCenter: parent.verticalCenter
                border.color: "#e6e6e6"
                border.width: 2
                scale: 0.9
                color: pickerRect.hueColor

                property real value: x / (parent.width - width)

                Behavior on scale { NumberAnimation { easing.type: Easing.OutBack; duration: 300 } }

                Rectangle {
                    anchors.fill: parent
                    anchors.margins: 1
                    color: "transparent"
                    border.color: "white"
                    border.width: 2
                }
            }

            MouseArea {
                anchors.fill: parent

                function handleCursorPos(x) {
                    let halfWidth = hueSlider.width * 0.5;
                    hueSlider.x = Math.max(0, Math.min(width, x + halfWidth) - hueSlider.width);
                }

                onPressed: (mouse) => {
                    hueSlider.scale = 0.6;
                    handleCursorPos(mouse.x);
                }
                onReleased: hueSlider.scale = 0.9;
                onPositionChanged: (mouse) => handleCursorPos(mouse.x);
            }
        }

        Item {
            id: alphaPickerItem
            width: huePicker.width
            height: huePicker.height
            anchors.top: huePicker.bottom
            anchors.topMargin: 25
            anchors.left: huePicker.left

            Grid {
                id: alphaPicker
                anchors.fill: parent
                rows: 4
                columns: 29
                clip: true

                property real cellWidth: width / columns
                property real cellHeight: height / rows

                Repeater {
                    model: parent.columns * parent.rows

                    Rectangle {
                        width: alphaPicker.cellWidth
                        height: width
                        color: (index % 2 == 0) ? "gray" : "transparent"
                    }
                }
            }

            Rectangle {
                anchors.fill: parent
                gradient: Gradient {
                    orientation: Gradient.Horizontal
                    GradientStop { position: 1.0; color: "#ff000000" }
                    GradientStop { position: 0.0; color: "#00ffffff" }
                }
            }

            Rectangle {
                id: alphaSlider
                x: parent.width - width
                width: height
                height: parent.height
                anchors.verticalCenter: parent.verticalCenter
                color: Qt.rgba(0.1, 0.1, 0.1, (value + 1.0) / 2.0)
                border.color: "#e6e6e6"
                border.width: 2
                scale: 0.9

                property real value: x / (parent.width - width)

                Behavior on scale { NumberAnimation { easing.type: Easing.OutBack; duration: 300 } }

                Rectangle {
                    anchors.fill: parent
                    anchors.margins: 1
                    color: "transparent"
                    border.color: "white"
                    border.width: 1
                }
            }

            MouseArea {
                anchors.fill: parent

                function handleCursorPos(x) {
                    let halfWidth = alphaSlider.width * 0.5;
                    alphaSlider.x = Math.max(0, Math.min(width, x + halfWidth) - alphaSlider.width);
                }

                onPressed: (mouse) => {
                    alphaSlider.scale = 0.6;
                    handleCursorPos(mouse.x);
                }
                onReleased: alphaSlider.scale = 0.9;
                onPositionChanged: (mouse) => handleCursorPos(mouse.x);
            }
        }

        Button {
            id: confirmButton
            width: 200
            height: alphaPickerItem.height
            anchors.top: alphaPickerItem.bottom
            anchors.topMargin: 25
            anchors.left: alphaPickerItem.left
            text: qsTr("确定")
            hoverEnabled: true
            topInset: down ? 1 : 0
            bottomInset: topInset
            leftInset: topInset
            rightInset: topInset
            font.family: "微软雅黑"
            onClicked: {
                root.initColor = root.currentColor;
                root.hide();
                root.accepted();
            }
        }

        Button {
            id: cancelButton
            width: 200
            height: alphaPickerItem.height
            anchors.top: alphaPickerItem.bottom
            anchors.topMargin: 25
            anchors.right: parent.right
            anchors.rightMargin: 25
            text: qsTr("取消")
            hoverEnabled: true
            topInset: down ? 1 : 0
            bottomInset: topInset
            leftInset: topInset
            rightInset: topInset
            font.family: "微软雅黑"
            onClicked: {
                pickerRect.setColor(root.initColor);
                root.hide();
                root.rejected();
            }
        }
    }
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
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
82
83
84
85
86
87
88
89
90
91
92
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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549

源码下载