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Improve QML Weather example layout...
Titta Heikkala -
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1 1 /****************************************************************************
2 2 **
3 3 ** Copyright (C) 2014 Digia Plc
4 4 ** All rights reserved.
5 5 ** For any questions to Digia, please use contact form at http://qt.io
6 6 **
7 7 ** This file is part of the Qt Charts module.
8 8 **
9 9 ** Licensees holding valid commercial license for Qt may use this file in
10 10 ** accordance with the Qt License Agreement provided with the Software
11 11 ** or, alternatively, in accordance with the terms contained in a written
12 12 ** agreement between you and Digia.
13 13 **
14 14 ** If you have questions regarding the use of this file, please use
15 15 ** contact form at http://qt.io
16 16 **
17 17 ****************************************************************************/
18 18
19 19 import QtQuick 2.0
20 20 import QtCharts 2.0
21 21
22 22 Rectangle {
23 23 width: 500
24 24 height: 400
25 25 gradient: Gradient {
26 26 GradientStop { position: 0.0; color: "lightblue" }
27 27 GradientStop { position: 1.0; color: "white" }
28 28 }
29 29
30 30 //![1]
31 31 ChartView {
32 32 id: chartView
33 33 title: "Weather forecast"
34 34 //![1]
35 height: parent.height / 4 * 3
35 36 anchors.top: parent.top
36 anchors.bottom: weatherImageRow.top
37 37 anchors.left: parent.left
38 38 anchors.right: parent.right
39 39 legend.alignment: Qt.AlignTop
40 40 antialiasing: true
41 41
42 42 //![2]
43 43 BarCategoryAxis {
44 44 id: barCategoriesAxis
45 45 titleText: "Date"
46 46 }
47 47
48 48 ValueAxis{
49 49 id: valueAxisY2
50 50 min: 0
51 51 max: 10
52 52 titleText: "Rainfall [mm]"
53 53 }
54 54
55 55 ValueAxis {
56 56 id: valueAxisX
57 57 // Hide the value axis; it is only used to map the line series to bar categories axis
58 58 visible: false
59 59 min: 0
60 60 max: 5
61 61 }
62 62
63 63 ValueAxis{
64 64 id: valueAxisY
65 65 min: 0
66 66 max: 15
67 67 titleText: "Temperature [°C]"
68 68 }
69 69
70 70 LineSeries {
71 71 id: maxTempSeries
72 72 axisX: valueAxisX
73 73 axisY: valueAxisY
74 74 name: "Max. temperature"
75 75 }
76 76
77 77 LineSeries {
78 78 id: minTempSeries
79 79 axisX: valueAxisX
80 80 axisY: valueAxisY
81 81 name: "Min. temperature"
82 82 }
83 83
84 84 BarSeries {
85 85 id: myBarSeries
86 86 axisX: barCategoriesAxis
87 87 axisYRight: valueAxisY2
88 88 BarSet {
89 89 id: rainfallSet
90 90 label: "Rainfall"
91 91 }
92 92 }
93 93 //![2]
94 94 }
95 95
96 96 // A timer to refresh the forecast every 5 minutes
97 97 Timer {
98 98 interval: 300000
99 99 repeat: true
100 100 triggeredOnStart: true
101 101 running: true
102 102 onTriggered: {
103 103 if (weatherAppKey != "") {
104 104 //![3]
105 105 // Make HTTP GET request and parse the result
106 106 var xhr = new XMLHttpRequest;
107 107 xhr.open("GET",
108 108 "http://free.worldweatheronline.com/feed/weather.ashx?q=Jyv%c3%a4skyl%c3%a4,Finland&format=json&num_of_days=5&key="
109 109 + weatherAppKey);
110 110 xhr.onreadystatechange = function() {
111 111 if (xhr.readyState == XMLHttpRequest.DONE) {
112 112 var a = JSON.parse(xhr.responseText);
113 113 parseWeatherData(a);
114 114 }
115 115 }
116 116 xhr.send();
117 117 //![3]
118 118 } else {
119 119 // No app key for worldweatheronline.com given by the user -> use dummy static data
120 120 var responseText = "{ \"data\": { \"current_condition\": [ {\"cloudcover\": \"10\", \"humidity\": \"61\", \"observation_time\": \"06:26 AM\", \"precipMM\": \"0.0\", \"pressure\": \"1022\", \"temp_C\": \"6\", \"temp_F\": \"43\", \"visibility\": \"10\", \"weatherCode\": \"113\", \"weatherDesc\": [ {\"value\": \"Sunny\" } ], \"weatherIconUrl\": [ {\"value\": \"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0001_sunny.png\" } ], \"winddir16Point\": \"SE\", \"winddirDegree\": \"140\", \"windspeedKmph\": \"7\", \"windspeedMiles\": \"4\" } ], \"request\": [ {\"query\": \"Jyvaskyla, Finland\", \"type\": \"City\" } ], \"weather\": [ {\"date\": \"2012-05-09\", \"precipMM\": \"0.4\", \"tempMaxC\": \"14\", \"tempMaxF\": \"57\", \"tempMinC\": \"7\", \"tempMinF\": \"45\", \"weatherCode\": \"116\", \"weatherDesc\": [ {\"value\": \"Partly Cloudy\" } ], \"weatherIconUrl\": [ {\"value\": \"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0002_sunny_intervals.png\" } ], \"winddir16Point\": \"S\", \"winddirDegree\": \"179\", \"winddirection\": \"S\", \"windspeedKmph\": \"20\", \"windspeedMiles\": \"12\" }, {\"date\": \"2012-05-10\", \"precipMM\": \"2.4\", \"tempMaxC\": \"13\", \"tempMaxF\": \"55\", \"tempMinC\": \"8\", \"tempMinF\": \"46\", \"weatherCode\": \"266\", \"weatherDesc\": [ {\"value\": \"Light drizzle\" } ], \"weatherIconUrl\": [ {\"value\": \"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0017_cloudy_with_light_rain.png\" } ], \"winddir16Point\": \"SW\", \"winddirDegree\": \"219\", \"winddirection\": \"SW\", \"windspeedKmph\": \"21\", \"windspeedMiles\": \"13\" }, {\"date\": \"2012-05-11\", \"precipMM\": \"11.1\", \"tempMaxC\": \"15\", \"tempMaxF\": \"59\", \"tempMinC\": \"7\", \"tempMinF\": \"44\", \"weatherCode\": \"266\", \"weatherDesc\": [ {\"value\": \"Light drizzle\" } ], \"weatherIconUrl\": [ {\"value\": \"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0017_cloudy_with_light_rain.png\" } ], \"winddir16Point\": \"SSW\", \"winddirDegree\": \"200\", \"winddirection\": \"SSW\", \"windspeedKmph\": \"20\", \"windspeedMiles\": \"12\" }, {\"date\": \"2012-05-12\", \"precipMM\": \"2.8\", \"tempMaxC\": \"7\", \"tempMaxF\": \"44\", \"tempMinC\": \"2\", \"tempMinF\": \"35\", \"weatherCode\": \"317\", \"weatherDesc\": [ {\"value\": \"Light sleet\" } ], \"weatherIconUrl\": [ {\"value\": \"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0021_cloudy_with_sleet.png\" } ], \"winddir16Point\": \"NW\", \"winddirDegree\": \"311\", \"winddirection\": \"NW\", \"windspeedKmph\": \"24\", \"windspeedMiles\": \"15\" }, {\"date\": \"2012-05-13\", \"precipMM\": \"0.4\", \"tempMaxC\": \"6\", \"tempMaxF\": \"42\", \"tempMinC\": \"2\", \"tempMinF\": \"35\", \"weatherCode\": \"116\", \"weatherDesc\": [ {\"value\": \"Partly Cloudy\" } ], \"weatherIconUrl\": [ {\"value\": \"http:\/\/www.worldweatheronline.com\/images\/wsymbols01_png_64\/wsymbol_0002_sunny_intervals.png\" } ], \"winddir16Point\": \"WNW\", \"winddirDegree\": \"281\", \"winddirection\": \"WNW\", \"windspeedKmph\": \"21\", \"windspeedMiles\": \"13\" } ] }}";
121 121 var a = JSON.parse(responseText);
122 122 parseWeatherData(a);
123 123 }
124 124 }
125 125 }
126 126
127 127 Row {
128 128 id: weatherImageRow
129 anchors.top: chartView.bottom
130 anchors.topMargin: 5
129 131 anchors.bottom: poweredByText.top
130 anchors.bottomMargin: 10
131 anchors.left: parent.left
132 anchors.leftMargin: 25
133 anchors.right: parent.right
134 anchors.rightMargin: 25
132 anchors.bottomMargin: 5
133 anchors.horizontalCenter: parent.horizontalCenter
134 height: parent.height - chartView.height - anchors.topMargin
135 135
136 136 ListModel {
137 137 id: weatherImageModel
138 138 }
139 139
140 140 Repeater {
141 141 id: repeater
142 142 model: weatherImageModel
143 143 delegate: Image {
144 144 source: imageSource
145 width: weatherImageRow.width / weatherImageModel.count
145 width: weatherImageRow.height
146 146 height: width
147 147 fillMode: Image.PreserveAspectCrop
148 148 }
149 149 }
150 150 }
151 151
152 152 Text {
153 153 id: poweredByText
154 154 anchors.bottom: parent.bottom
155 anchors.bottomMargin: 10
155 anchors.bottomMargin: 5
156 156 anchors.left: parent.left
157 157 anchors.leftMargin: 25
158 height: parent.height / 25
158 159 text: "Powered by World Weather Online"
159 160 }
160 161
161 162 function parseWeatherData(weatherData) {
162 163 // Clear previous values
163 164 maxTempSeries.clear();
164 165 minTempSeries.clear();
165 166 weatherImageModel.clear();
166 167
167 168 //![4]
168 169 // Loop through the parsed JSON
169 170 for (var i in weatherData.data.weather) {
170 171 var weatherObj = weatherData.data.weather[i];
171 172 //![4]
172 173
173 174 //![5]
174 175 // Store temperature values, rainfall and weather icon.
175 176 // The temperature values begin from 0.5 instead of 0.0 to make the start from the
176 177 // middle of the rainfall bars. This makes the temperature lines visually better
177 178 // synchronized with the rainfall bars.
178 179 maxTempSeries.append(Number(i) + 0.5, weatherObj.tempMaxC);
179 180 minTempSeries.append(Number(i) + 0.5, weatherObj.tempMinC);
180 181 rainfallSet.append(i, weatherObj.precipMM);
181 182 weatherImageModel.append({"imageSource":weatherObj.weatherIconUrl[0].value});
182 183 //![5]
183 184
184 185 // Update scale of the chart
185 186 valueAxisY.max = Math.max(chartView.axisY().max,weatherObj.tempMaxC);
186 187 valueAxisX.min = 0;
187 188 valueAxisX.max = Number(i) + 1;
188 189
189 190 // Set the x-axis labels to the dates of the forecast
190 191 var xLabels = barCategoriesAxis.categories;
191 192 xLabels[Number(i)] = weatherObj.date.substring(5, 10);
192 193 barCategoriesAxis.categories = xLabels;
193 194 barCategoriesAxis.visible = true;
194 195 barCategoriesAxis.min = 0;
195 196 barCategoriesAxis.max = xLabels.length - 1;
196 197 }
197 198 }
198 199
199 200 }
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