qml : qml控件自适应;
import QtQuick 2.4 Item { property var targetItem: parent property bool fixedAspectRatio: true // Else zoom from width and height property bool accordingToX: true // Else according to center property var targetItemGeometry property var childrenItemGeometry property bool isBegin: false function begin() { targetItemGeometry = new Object; targetItemGeometry["width"] = targetItem.width; targetItemGeometry["height"] = targetItem.height; var children = targetItem.children; var data = new Array; for(var index = 1; index < children.length; index++) { var currentItem = children[index]; var buf = new Object; buf["item"] = currentItem; buf["x"] = currentItem.x; buf["y"] = currentItem.y; buf["centerX"] = currentItem.x + (currentItem.width / 2); buf["centerY"] = currentItem.y + (currentItem.height / 2); buf["width"] = currentItem.width; buf["height"] = currentItem.height; data.push(buf); } childrenItemGeometry = data; isBegin = true; } function resize() { if(isBegin) { var horizontalRatio, verticalRatio; horizontalRatio = targetItem.width / targetItemGeometry["width"]; verticalRatio = targetItem.height / targetItemGeometry["height"]; for(var index = 0; index < childrenItemGeometry.length; index++) { if(fixedAspectRatio) { if(horizontalRatio > verticalRatio) { childrenItemGeometry[index]["item"].width = childrenItemGeometry[index]["width"] * verticalRatio; childrenItemGeometry[index]["item"].height = childrenItemGeometry[index]["height"] * verticalRatio; } else { childrenItemGeometry[index]["item"].width = childrenItemGeometry[index]["width"] * horizontalRatio; childrenItemGeometry[index]["item"].height = childrenItemGeometry[index]["height"] * horizontalRatio; } } else { childrenItemGeometry[index]["item"].width = childrenItemGeometry[index]["width"] * horizontalRatio; childrenItemGeometry[index]["item"].height = childrenItemGeometry[index]["height"] * verticalRatio; } if(accordingToX) { childrenItemGeometry[index]["item"].x = childrenItemGeometry[index]["x"] * horizontalRatio; childrenItemGeometry[index]["item"].y = childrenItemGeometry[index]["y"] * verticalRatio; } else { childrenItemGeometry[index]["item"].x = childrenItemGeometry[index]["centerX"] * horizontalRatio - (childrenItemGeometry[index]["item"].width / 2); childrenItemGeometry[index]["item"].y = childrenItemGeometry[index]["centerY"] * verticalRatio - (childrenItemGeometry[index]["item"].height / 2); } } } } Component.onCompleted: { begin(); } Component { id: connections Connections { target: targetItem onWidthChanged: { resize(); } onHeightChanged: { resize(); } } } Loader { Component.onCompleted: { sourceComponent = connections; } } }