New Custom Pages (2017)

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Introduction

A new scheme of custom pages making use of modern HTML5 techniques has been introduced in 2017. This page describes all new elements and gives some example pages.

Required Elements

For the new custom pages to work, the following elements in a custom HTML page are required:

• Including midas.js
• Including mhttpd.js
• Including style sheet midas.css
• Setting the class of the HTML body to mcss
• Calling mhttpd_init('name') on page load where name is the name of the page shown on the left menu bar
• Using div elements with various pre-defined id's and names

modb

This special HTML div tag (abbreviation stands for Midas ODB) <div name="modb" data-odb-path="/Some/Path" onchange="func()"> can be used to call a user-defined function func() if a value in the ODB changes. This function must be defined inline or in a separate <script>...</script> section, and can execute any operation, such as opening a dialog box, hiding/unhiding parts of the custom page, or changing colors and styles of page elements.

modbvalue

This special HTML div tag (abbreviation stands for Midas ODB VALUE) <div name="modbvalue" data-odb-path="/Some/Path"> is now automatically replaced by the value in the ODB found at the given path. Updates are once per second by default. This can be changed by passing a second argument to mhttpd_init('name', interval) where interval is in milliseconds. The following options are valid for this tag:

Table 1: List of valid options for modbvalue tag

Option	Example	Meaning
name	name="modbvalue"	Tells the framework to replace this tag with an ODB value
data-odb-path	data-odb-path = "/Runinfo/Run number"	Path to the value in the ODB
data-odb-editable	data-odb-editable="1"	If set, the value is not only shown, but is also clickable for in-line editing. Hitting return send the new value to the ODB.
data-format	data-format="f3"	Specify format of data shown. See Table 2 below for options.

Table 2 below lists the format specifiers supported with a modbvalue tag data-format="...":

Table 2: Format specifiers for modbvalue tag data-format="..."

Option	Example	Meaning
d	1234	Shows a number in decimal encoding
x	0x4D2	Shows a number in hexadecimal encoding
b	10011010010b	Shows a number in binary encoding. Options d, x, b can be combined, like data-format="dxb"
f<x>	1.234	Shows a floating point number with <x> digits after the decimal. A value of f0 shows only the integer part.
p<x>	1.23	Shows a floating point number with <x> significant digits of precision, independent of the decimal. For example a value of p2 can render a number to 12000 or to 0.00012

modbbutton

This tag generates a push-button which can set a certain ODB entry to a specific value. To set the "Run number" to 100, one can use the following tag:

<button name="modbbutton" class="mbutton" data-odb-path="/Runinfo/Run number" data-odb-value="100">

modbcheckbox

This tag generates a check box which can set a certain ODB entry to true or false. To set the "Write data" flag for the logger true or false, one can use the following tag:

<input type="checkbox" name="modbcheckbox" data-odb-path="/Logger/Write data">

If the ODB value changed by this control is of type integer, its value will be set to 1 or 0.

modbhbar

The following tag:

<div name="modbhbar" style="width: 500px; height: 18px;" data-odb-path="/Runinfo/Run number" data-max-value="10" data-color="lightgreen" data-value="1" ></div>

shows a horizontal bar with a total length of 500px. Depending on the ODB value Run number. If Run number is 10, then the bar is filled all the way to the right, if Run number is 5, the bar is only filled halfway. Following options are possible:

Setting	Meaning	Required
style="width: 500px"	Total width of the horizontal bar	Yes
style="height: 18px"	Height of the horizontal bar	Yes
data-odb-path	ODB path of value being displayed	Yes
data-max-value	Right limit of bar range	Yes
data-min-value	Left limit of bar range	0 if not present
data-color	Color of bar	transparent if not present
data-value	If "1", data value is shown as text overlay	No

modbvbar

Same as modbhbar, except the bar grows vertically instead of horizontally.

modbthermo

The following tag:

<div name="modbthermo" style="width: 30px; height: 100px;" data-odb-path="/Runinfo/Run number" data-min-value="-10" data-max-value="30" data-color="blue" data-value="1" ></div>

shows a vertical thermometer ranging from -10 to 30. Depending on the ODB value Run number. Following options are possible:

Setting	Meaning	Required
style="width: 30px"	Width of the thermometer	Yes
style="height: 100px"	Total height of the thermometer	Yes
data-odb-path	ODB path of value being displayed	Yes
data-max-value	Upper range	Yes
data-min-value	Lower range	0 if not present
data-color	Color of thermometer	Black if not present
data-background-color	Color of thermometer background	Transparent if not present
data-value	If "1", data value is shown below the thermometer	No

modbgauge

The following tag:

<div name="modbgauge" style="width: 100px; height: 50px;" data-odb-path="/Runinfo/Run number" data-min-value="0" data-max-value="10" data-color="darkgreen"></div>

shows a circular gauge ranging from 0 to 10. Depending on the ODB value "Run number". Following options are possible:

Setting	Meaning	Required
style="width: 100px"	Width of the gauge	Yes
style="height: 50px"	Total height of the gauge	Yes
data-odb-path	ODB path of value being displayed	Yes
data-max-value	Upper range	Yes
data-min-value	Lower range	0 if not present
data-color	Color of gauge	Black if not present
data-background-color	Color of gauge background	Transparent if not present
data-value	If "1", data value is shown below the gauge	No
data-scale	If "1", the min and max values of the range are shown below the gauge	No

If the gauge scale is not shown, the gauge height should be half the gauge width. If the scale is shown, 15px must be added to the height.

Changing properties of controls dynamically

All custom controls can be changed dynamically (meaning depending on their value) by implementing a onchange function. This function has access to the current value and can change any of the parameters of the control. Following callback for example changes the color of a thermometer to red if the value is above 30 and to blue if it is below:

onchange="this.dataset.color=this.value > 30?'red':'blue';"

Complete Example

The following code shows an example page (contained in resources/a_example.html in the MIDAS distribution) of a custom page implementing most of the new features. You activate this page by putting in the ODB:

/Custom
  Path     /midas/resources
  Test     a_example.html

Code

The file a_example.html contains the following code:

<!DOCTYPE html>
<html class="mcss">
<head>
   <meta charset="UTF-8">
   <link rel="stylesheet" href="midas.css">
   <script src="controls.js"></script>
   <script src="midas.js"></script>
   <script src="mhttpd.js"></script>
   <title>Example</title>
</head>

<body class="mcss" onload="mhttpd_init('Test');">

<!-- header and side navigation will be filled in mhttpd_start -->
<div id="mheader"></div>
<div id="msidenav"></div>

<div id="mmain">
   <table class="mtable">
      <tr>
         <th colspan="2" class="mtableheader">Status</th>
      </tr>
      <tr>
         <td style="width: 200px;">
            Run number:
         </td>
         <td>
            <div name="modbvalue" data-odb-path="/Runinfo/Run number" data-odb-editable="1"></div>
         </td>
      </tr>
      <tr>
         <td>
            Last run start:
         </td>
         <td>
            <div name="modbvalue" data-odb-path="/Runinfo/Start time"></div>
         </td>
      </tr>
      <tr>
         <td>
            Last run stop:
         </td>
         <td>
            <div name="modbvalue" data-odb-path="/Runinfo/Stop time"></div>
         </td>
      </tr>
      <tr>
         <td>
            Check box:
         </td>
         <td>
            <input type="checkbox" name="modbcheckbox" data-odb-path="/Logger/Write data"></input>
         </td>
      </tr>
      <tr>
         <td>
            Color box:
         </td>
         <td>
            <div name="modbbox" style="width: 30px; height: 30px;" data-odb-path="/Logger/Write data"
                 data-color="lightgreen" data-background-color="red"></div>
         </td>
      </tr>
      <tr>
         <td>
            Horizontal bars:
         </td>
         <td>
            <div name="modbhbar" style="width: 500px; height: 18px;" data-odb-path="/Runinfo/Run number" data-max-value="10"
                 data-color="lightgreen" data-value="0"></div><br /><br />
            <div name="modbhbar" style="width: 200px; height: 10px;" data-odb-path="/Runinfo/Run number" data-max-value="10"
                 data-color="green" data-value="0"></div>
         </td>
      </tr>
      <tr>
         <td>
            Vertical bars:
         </td>
         <td>
            <div name="modbvbar" style="width:20px;height:100px;" data-odb-path="/Runinfo/Run number" data-min-value="4" data-max-value="20"
                 data-color="lightgreen"></div>
            <div name="modbvbar" style="width:10px;height:100px;" data-odb-path="/Runinfo/Run number" data-max-value="10"
                 data-color="red"></div>
         </td>
      </tr>

      <tr>
         <td>
            Thermometer:
         </td>
         <td>
            <div name="modbthermo" style="width:30px;height:100px;" data-odb-path="/Runinfo/Run number" data-min-value="-10" data-max-value="30"
                 data-color="darkgreen"></div>
            <div name="modbthermo" style="width:60px;height:100px;" data-odb-path="/Runinfo/Run number" data-min-value="-10" data-max-value="30"
                 data-color="blue" data-scale="1"
                 onchange="this.dataset.color=this.value > 9?'red':'blue';"></div>
            <div name="modbthermo" style="width:30px;height:100px;" data-odb-path="/Runinfo/Run number" data-min-value="-10" data-max-value="30"
                 data-color="blue" data-background-color="white" data-value="1"></div>
         </td>
      </tr>

      <tr>
         <td>
            Gauges:
         </td>
         <td>
            <div name="modbgauge" style="width:100px;height:50px;" data-odb-path="/Runinfo/Run number" data-min-value="0" data-max-value="10"
                 data-color="darkgreen" data-background-color="lightgrey" ></div>
            <div name="modbgauge" style="width:100px;height:65px;" data-odb-path="/Runinfo/Run number" data-min-value="0" data-max-value="10"
                 data-color="red" data-value="1" data-scale="1"></div>
         </td>
      </tr>

      <tr>
         <td colspan="2" style="text-align: center;">
            <!-- div around image with "relative" position as anchor for labels and bars -->
            <div style="position:relative;width:300px;margin:auto">

               <img src="tank.gif"> <!-- background image of tank -->

               <!-- label next to valve -->
               <div name="modbvalue" data-odb-path="/Runinfo/Run number" data-odb-editable="1"
                    style="position:absolute;top:157px;left:288px;"></div>

               <!-- vertical bar inside tank, render red if value > 9 -->
               <div name="modbvbar" style="position:absolute;top:80px;left:10px;width:104px;height:170px;"
                    data-odb-path="/Runinfo/Run number" data-max-value="11" data-color="green"
                    onchange="this.firstChild.style.backgroundColor=(this.value > 9)?'red':'green';"></div>

               <!-- thermometer inside tank -->
               <div name="modbthermo" style="position:absolute;top:140px;left:20px;width:20px;height:100px;"
                    data-odb-path="/Runinfo/Run number" data-min-value="-10" data-max-value="30"
                    data-color="blue" data-value="1"></div>

            </div>
         </td>
      </tr>

      <tr>
         <td colspan="2" style="text-align: center;">
            <button name="modbbutton" class="mbutton" data-odb-path="/Runinfo/Run number" data-odb-value="1">Set run
               number to 1
            </button>
            </button>
            <button name="modbbutton" class="mbutton" data-odb-path="/Runinfo/Run number" data-odb-value="5">Set run
               number to 5
            </button>
            </button>
            <button name="modbbutton" class="mbutton" data-odb-path="/Runinfo/Run number" data-odb-value="10">Set run
               number to 10
            </button>
            </button>
         </td>
      </tr>
   </table>
</div>

</body>
</html>

which results in the page shown in Figure 1 below.

Figure 1 Example custom page using new (2017) features