阻抗弹窗

ZBD_IIIDL_S_Project/release/QtQuick/Controls/Private/SourceProxy.qml

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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.2
+
+Item {
+    id: rootItem
+    property variant input
+    property variant output
+    property variant sourceRect
+    visible: false
+
+    Component.onCompleted: evaluateInput()
+
+    onInputChanged: evaluateInput()
+
+    onSourceRectChanged: evaluateInput()
+
+    function evaluateInput() {
+        if (input == undefined) {
+            output =  input
+        }
+        else if (sourceRect != undefined && sourceRect != Qt.rect(0, 0, 0, 0) && !isQQuickShaderEffectSource(input)) {
+            proxySource.sourceItem = input
+            output = proxySource
+            proxySource.sourceRect = sourceRect
+        }
+        else if (isQQuickItemLayerEnabled(input)) {
+            output = input
+        }
+        else if ((isQQuickImage(input) && !hasTileMode(input) && !hasChildren(input))) {
+            output = input
+        }
+        else if (isQQuickShaderEffectSource(input)) {
+            output = input
+        }
+        else {
+            proxySource.sourceItem = input
+            output = proxySource
+            proxySource.sourceRect = Qt.rect(0, 0, 0, 0)
+        }
+    }
+
+    function isQQuickItemLayerEnabled(item) {
+        if (item.hasOwnProperty("layer")) {
+            var l = item["layer"]
+            if (l.hasOwnProperty("enabled") && l["enabled"].toString() == "true")
+                return true
+        }
+        return false
+    }
+
+    function isQQuickImage(item) {
+        var imageProperties = [ "fillMode", "progress", "asynchronous", "sourceSize", "status", "smooth" ]
+        return hasProperties(item, imageProperties)
+    }
+
+    function isQQuickShaderEffectSource(item) {
+        var shaderEffectSourceProperties = [ "hideSource", "format", "sourceItem", "mipmap", "wrapMode", "live", "recursive", "sourceRect" ]
+        return hasProperties(item, shaderEffectSourceProperties)
+    }
+
+    function hasProperties(item, properties) {
+        var counter = 0
+            for (var j = 0; j < properties.length; j++) {
+                if (item.hasOwnProperty(properties [j]))
+                    counter++
+            }
+        return properties.length == counter
+    }
+
+    function hasChildren(item) {
+        if (item.hasOwnProperty("childrenRect")) {
+            if (item["childrenRect"].toString() != "QRectF(0, 0, 0, 0)")
+                return true
+            else
+                return false
+        }
+        return false
+    }
+
+    function hasTileMode(item) {
+        if (item.hasOwnProperty("fillMode")) {
+            if (item["fillMode"].toString() != "0")
+                return true
+            else
+                return false
+        }
+        return false
+    }
+
+    ShaderEffectSource {
+        id: proxySource
+        live: rootItem.input != rootItem.output
+        hideSource: false
+        smooth: true
+        visible: false
+    }
+}
+