This is a documentation for Board Game Arena: play board games online !
Your game mobile version: Difference between revisions
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Note that the above only applies in portrait orientation. In landscape orientation, the BGA framework always sets the viewport to "width=980". Overriding the viewport for landscape orientation is more complicated (requires overriding undocumented framework functions), so it is not recommended. | Note that the above only applies in portrait orientation. In landscape orientation, the BGA framework always sets the viewport to "width=980" (which allows pinch-and-zoom). Overriding the viewport for landscape orientation is more complicated (requires overriding undocumented framework functions), so it is not recommended. | ||
Revision as of 01:09, 27 February 2021
Board Game Arena is now adaptated for Mobiles and Tablets too.
It is very easy to have a mobile version of the game you developed with BGA Studio. In fact, your game is probably already 100% playable on mobile.
However, to provide your players the best experience, you should follow the two piece of advice below.
Declare your interface minimum width
By default, your game can run in a window of up to 740 pixels wide. Including the information in the right column (player's panel), it fits on a 1024px wide screen.
However, you can choose to declare that your game is able to run with a smaller width. This way, the game will appear much better on mobile screens and tablets.
For example, the Reversi board is only 540px wide. If we stay with the default width (740px), the game interface displayed on mobile will be too large and some space will be lost on the left and on the right. Consequently the Reversi board will appear very small on the mobile screen, and players will have to "pinch & zoom" to display it correctly.
To avoid that, we can specify that the game can be played with an interface with a minimum width of 540 pixels, by adding the following to gameinfos.inc.php :
// Game interface width range (pixels) // Note: game interface = space on the left side, without the column on the right 'game_interface_width' => array( // Minimum width // default: 740 // maximum possible value: 740 (i.e. your game interface should fit with a 740px width, corresponding to a 1024px screen) // minimum possible value: 320 (the lower the value you specify, the better the display is on mobile) 'min' => 540, // Maximum width // default: null (i.e. no limit, the game interface is as big as the player's screen allows). // maximum possible value: unlimited // minimum possible value: 740 'max' => null ),
And that's it! Now, BGA can choose the better display for your game interface, whatever the device.
Important
If you declare that your interface can run with a 540 pixels width, it must effectively run on an interface with 540 pixels width.
Note that this doesn't mean that your interface must always be 540 pixels width; you just have to make your interface fluid and/or use CSS media queries to fit any width.
Examples :
- On Can't Stop, when the screen is too narrow, we move the dice on another position (below the main board) to fit within the width :
@media only screen and (max-width: 990px) {
#dicechoices {
left: 180px;
top: 530px;
}
#cantstop_wrap {
height: 900px;
width: 550px;
}
}
- On Seasons, we have some panels on the right of the board. On small screens, we display these panels below the board:
@media only screen and (max-width: 970px) {
#board {
float: none;
margin: auto;
}
.seasons_rightpanel {
margin-left: 0px;
}
}
Tip: on mobile, BGA displays player panels at the top of the page (instead of displaying them on the right). When doing this, BGA applies the CSS class "mobile_version" to the root HTML element with id "ebd-body". If you want you can use this CSS "mobile_version" class to optimize some of your game adaptations to this change. In the opposite, when the "normal" version is active, the CSS class "desktop_version" BGA applies the CSS class "desktop_version" to the root HTML element with id "ebd-body".
Touchscreen compatibility
Most of your games should work with touchscreen devices without needing any changes.
Note: when your game is running on a touchscreen device, the global CSS class "touch-device" is added to the to the root HTML element with id "ebd-body" (and "notouch-device" is added for the opposite).
What may not work :
- ":hover" CSS switch. Because there is no mouse, ":hover" won't be triggered. This is not an issue unless it is needed to play the game. In addition, some touch devices consider that a short touch must trigger a ":hover" (and should apply corresponding CSS), which can block an interaction in your game. We advise you to explicitely disable ":hover" effects when your game is running on a touchscreen device (for ex. by adding ".notouch-device" as a prefix to all your CSS :hover rules).
- Mouseover events : like the previous one : if you associated Javascript events to "onmouseover" event, it won't work on tablets.
- Drag'n'drop : it won't work. To make it work, you should listen to "ontouchstart", "ontouchmove" and "ontouchend" event and trigger the same logic you already have for "onmousedown", "onmousemove" and "onmouseup". You should also make sure to stop the Javascript "ontouchmove" event (ex: dojo.stopEvent( evt ) ) during the drag n drop, otherwise the interface is going to scroll while drag'n'dropping.
Viewport <meta> tag
Mobile is an area where the BGA framework is very much showing its age. The built-in handling for mobile is incredibly unsatisfying because the framework was designed for a previous era, before mobile became the predominant form of web browsing (mobile has outpaced desktop browsing since 2016).
The most obvious problem is that the BGA framework uses the non-standard "zoom" CSS property to resize your game for the mobile screen, but the proper method is the viewport <meta> tag, which is supported by all mobile browsers and offers more control. The example below tells mobile browsers to disable pinch-and-zoom capabilities and treat the width of the screen as if it were 550px.
You can disable BGA's broken "zoom" feature with something like following in yourgame.js:
return declare("bgagame.yourgame", ebg.core.gamegui, {
constructor: function () {
// Set the mobile viewport for portrait orientation
this.default_viewport = 'width=550,user-scalable=no';
},
onScreenWidthChange: function () {
// Remove the zoom property that the framework adds to these elements
this.gameinterface_zoomFactor = 1;
dojo.style('page-content', 'zoom', );
dojo.style('page-title', 'zoom', );
dojo.style('right-side-first-part', 'zoom', );
},
Note that the above only applies in portrait orientation. In landscape orientation, the BGA framework always sets the viewport to "width=980" (which allows pinch-and-zoom). Overriding the viewport for landscape orientation is more complicated (requires overriding undocumented framework functions), so it is not recommended.