qml listview关键字高亮

研究了一天多，最终能实现的只有以下这种方案。view通过listmodel加载数据，但是 ，数据必须是经过整理的。才能实现关键字高亮。首先要把数据截取成一段一段的，再根据比较函数，确定是否高亮。最近研究qml头发都白了。。。

 1 import QtQuick 2.9
 2 import QtQuick.Window 2.2
 3 import QtQuick.Controls 2.3
 4 import QtQuick.Layouts 1.1
 5 
 6 Window {
 7     visible: true
 8     width: 640
 9     height: 480
10     title: qsTr("Hello World")
11     Rectangle {
12           width: 200; height: 200
13 
14           ListModel {
15                 id: fruitModel
16                 ListElement {
17                     attributes: [
18                         ListElement { description: "陈" },
19                         ListElement { description: "奕迅" },
20                         ListElement { description: "" }
21                     ]
22                 }
23                 ListElement {
24                     attributes: [
25                         ListElement { description: "陈" },
26                         ListElement { description: "雪" },
27                         ListElement { description: "凝" }
28                     ]
29                 }
30                 ListElement {
31                     attributes: [
32                         ListElement { description: "陈" },
33                         ListElement { description: "莉" },
34                         ListElement { description: "" }
35                     ]
36                 }
37             }
38           Component {
39               id: fruitDelegate
40               Item {
41                   width: 200; height: 50
42                   Row {
43                       Repeater {
44                           model: attributes
45                           Text {
46                               text: description
47                               color:description.indexOf("陈")>=0 ? "green":"blue"
48                               font.pixelSize:30
49                           }
50                       }
51                   }
52               }
53           }
54           ListView {
55               anchors.fill: parent
56               model: fruitModel
57               delegate: fruitDelegate
58           }
59       }
60 
61 }

效果图：

截取字符串，在qml中可以直接调用js的函数。截取字符串核心思想：一系列字符串，不管怎么截取，最多能变成一个大小为3的数组.有的时候是大小为2的数组。再根据数据，变换text文本的颜色

 1 import QtQuick 2.0
 2 
 3 Item {
 4     property string  souce_string
 5     property string  match_string
 6     property int     text_size
 7     property var     text_color
 8     property var theArray: []
 9     function match_search_string(souce_string,match_string)
10     {
11         console.log(souce_string.indexOf(match_string) )
12         var c = souce_string.indexOf(match_string)
13         console.log(souce_string.length )
14         var first_string
15         var second_string
16         var third_string
17         if(-1 !== c)
18         {
19             if(c === 0)
20             {
21                 first_string = souce_string.substring(0,souce_string.indexOf(match_string)+match_string.length)
22                 theArray.push(first_string)
23                 second_string = souce_string.substring(souce_string.indexOf(match_string)+match_string.length,souce_string.length )
24                 if(second_string.length !== 0)
25                 {
26                     theArray.push(second_string)
27                 }
28             }
29             else if(c !==0)
30             {
31                 first_string = souce_string.substring(0,souce_string.indexOf(match_string))
32                 theArray.push(first_string)
33                 second_string = souce_string.substring(souce_string.indexOf(match_string),souce_string.indexOf(match_string)+match_string.length)
34                 theArray.push(second_string)
35                 third_string = souce_string.substring(souce_string.indexOf(match_string)+match_string.length,souce_string.length)
36                 if(third_string.length !== 0)
37                 {
38                     theArray.push(third_string)
39                 }
40             }
41         }
42     }
43 
44 
45     Component.onCompleted:
46         {
47             match_search_string(souce_string,match_string)
48             if(theArray.length ===0)
49             {
50                 return
51             }
52             else
53             {
54                 if(theArray.length ===3)
55                 {
56                     first_text.text = theArray[0]
57                     second_text.text = theArray[1]
58                     second_text.color = text_color
59                     third_text.text = theArray[2]
60                 }
61                 else
62                 {
63                     if(souce_string.indexOf(match_string)===0)
64                     {
65                         first_text.text = theArray[0]
66                         first_text.color = text_color
67                         second_text.text = theArray[1]
68                         third_text.visible = false
69                     }
70                     else
71                     {
72                         first_text.text = theArray[0]
73                         second_text.text = theArray[1]
74                         second_text.color = text_color
75                         third_text.visible = false
76                     }
77                 }
78             }
79 
80         }
81         Row
82         {
83             id: layout
84             anchors.fill: parent
85             Text{
86                 id:first_text
87                 font.pixelSize:text_size
88             }
89             Text{
90                 id:second_text
91                 font.pixelSize:text_size
92             }
93             Text{
94                 id:third_text
95                 font.pixelSize:text_size
96             }
97         }
98 
99 }

这两段代码的结合我还没有想好。。。先记录下吧。。。。

 

以上方法，无法用append动态加载attributes的数据，总是出现压盖数据的问题，如果哪位网友能给我解答写，更好了。

代码就是这么写的：fruitModel.append({"attributes": [{"description":"陈","description":"奕迅","description":""}]});这样写的效果就压盖了

坑爹呀，再也不想写这个东西了，感觉快吐了。

不知道是不是qt的bug，又想出一种方法

 

 1 import QtQuick 2.9
 2 import QtQuick.Window 2.2
 3 import QtQuick.Controls 2.3
 4 import QtQuick.Layouts 1.1
 5 
 6 Window {
 7     id:root
 8     visible: true
 9     width: 640
10     height: 480
11     title: qsTr("Hello World")
12     Rectangle {
13           width: 200; height: 300
14           ListModel {
15                 id: fruitModel
16             }
17           Component {
18               id: fruitDelegate
19               Item {
20                   width: 200; height: 50
21                   Row {
22                       Text{
23                           text:first_text
24                           color:first_text.indexOf("陈")>=0 ? "green":"blue"
25                           font.pixelSize:30
26                       }
27                       Text{
28                           text:second_text
29                           color:second_text.indexOf("陈")>=0 ? "green":"blue"
30                           font.pixelSize:30
31                       }
32                       Text{
33                           text:third_text
34                           color:third_text.indexOf("陈")>=0 ? "green":"blue"
35                           font.pixelSize:30
36                       }
37                   }
38               }
39           }
40           ListView {
41               anchors.fill: parent
42               model: fruitModel
43               delegate: fruitDelegate
44           }
45           Button{
46             x:320
47             y:240
48             onClicked: {
49                 fruitModel.append({"first_text": "陈","second_text": "奕迅","third_text": ""});
50                 fruitModel.append({"first_text": "陈","second_text": "雪凝","third_text": ""});
51                 fruitModel.append({"first_text": "陈","second_text": "丽","third_text": "丽"});
52             }
53           }
54       }
55 
56 }

 

效果图：

 以上，应该就能通过append动态更新数据，从而达到效果，不过，list加载很慢。。。。我没办法了

posted @ 2019-05-28 15:21  wxmwanggood  阅读(1395)  评论(0)  编辑  收藏  举报