Yoctopuce Yocto-Display, Руководство пользователя

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Visual Studio projects contain numerous files, and most of them are not linked to the use of the
Yoctopuce library. To simplify reading the code, we regrouped all the code that uses the library in the
Demo
class, located in the
demo.cs
file. Properties of this class correspond to the different fields
displayed on the screen, and the
Run()
method contains the code which is run when the "Start"
button is pushed.
In this example, you can recognize the functions explained above, but this time used with all the side
materials needed to make it work nicely as a small demo.
using System ;
using System.Diagnostics ;
using System.Threading.Tasks ;
using Windows.UI.Xaml.Controls ;
using com.yoctopuce.YoctoAPI ;
namespace Demo
{
public class Demo : DemoBase
{
public string HubURL { get; set; }
public string Target { get; set; }
public string Message { get; set; }
public override async Task < int > Run ()
{
try {
await YAPI . RegisterHub ( HubURL );
YDisplay disp ;
YDisplayLayer l0, l1 ;
int h, w, y, x, vx, vy ;
// find the display according to command line parameters
if ( Target . ToLower () == "any" ) {
disp = YDisplay . FirstDisplay ();
if ( disp == null) {
WriteLine ( "No module connected (check USB cable) " );
return - 1 ;
}
} else {
disp = YDisplay . FindDisplay ( Target + ".display" );
}
if (!await disp . isOnline ()) {
WriteLine ( "Module not connected (check identification and USB cable) " );
return - 1 ;
}
//clean up
await disp . resetAll ();
// retreive the display size
w = await disp . get_displayWidth ();
h = await disp . get_displayHeight ();
// reteive the first layer
l0 = await disp . get_displayLayer ( 0 );
// display a text in the middle of the screen
await l0 . drawText ( w / 2 , h / 2 , YDisplayLayer . ALIGN . CENTER , Message );
// visualize each corner
await l0 . moveTo ( 0 , 5 );
await l0 . lineTo ( 0 , 0 );
await l0 . lineTo ( 5 , 0 );
await l0 . moveTo ( 0 , h - 6 );
await l0 . lineTo ( 0 , h - 1 );
await l0 . lineTo ( 5 , h - 1 );
await l0 . moveTo ( w - 1 , h - 6 );
await l0 . lineTo ( w - 1 , h - 1 );
await l0 . lineTo ( w - 6 , h - 1 );
await l0 . moveTo ( w - 1 , 5 );
await l0 . lineTo ( w - 1 , 0 );
await l0 . lineTo ( w - 6 , 0 );
// draw a circle in the top left corner of layer 1
15. Using the Yocto-Display with Universal Windows Platform
90 www.yoctopuce.com