<div dir="ltr">Aha no tak to je fajn...o tech stringach co nejsou Stringy jsem tak nejak netusil....jo ted uz to dam dohromady...snad ;-)<div><br></div><div>RV</div></div><div class="gmail_extra"><br><div class="gmail_quote">Dne 31. října 2017 12:35 Petr Zapadlo <span dir="ltr"><<a href="mailto:zapik@email.cz" target="_blank">zapik@email.cz</a>></span> napsal(a):<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Protože to je String a ne string :-)</p>
<p>String:</p>
<p><a class="m_5409446531146029777moz-txt-link-freetext" href="https://www.arduino.cc/en/Reference/StringObject" target="_blank">https://www.arduino.cc/en/<wbr>Reference/StringObject</a></p>
<p>string = char array</p>
<p><a class="m_5409446531146029777moz-txt-link-freetext" href="https://www.arduino.cc/en/Reference/String" target="_blank">https://www.arduino.cc/en/<wbr>Reference/String</a></p>
<p>To jsou 2 diametrálně odlišné proměnné a jinak se s nimi pracuje.</p>
<p>Petr<br>
</p>
<p><br>
</p>
<br>
<div class="m_5409446531146029777moz-cite-prefix">Dne 31. 10. 17 v 12:33 hwnews
konference napsal(a):<br>
</div><div><div class="h5">
<blockquote type="cite">
<div dir="ltr">Hmmm, tak proc funguje tohle:
<div><br>
</div>
<div>
<div>String message = "File Not Found\n\n";</div>
<div> message += "URI: ";</div>
<div> message += server.uri();</div>
<div> message += "\nMethod: ";</div>
<div> message += (server.method() == HTTP_GET)?"GET":"POST";</div>
<div> message += "\nArguments: ";</div>
<div> message += server.args();</div>
<div> message += "\n";</div>
<div> for (uint8_t i=0; i<server.args(); i++){</div>
<div> message += " " + server.argName(i) + ": " +
server.arg(i)+ "\n";<br>
</div>
<div> }<br>
</div>
<div> server.send(404, "text/plain", message);</div>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2017-10-31 12:20 GMT+01:00 Jaromir
Sukuba <span dir="ltr"><<a href="mailto:jarin.hw@gmail.com" target="_blank">jarin.hw@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>" message += " " + rv_text+ "\n";"<br>
</span>takto sa v C-cku stringy nespajaju. Vlastne, v C-cku
neexistuju<br>
stringy, ale polia char-ov ukoncene nulami (a vlastne ani
tie polia<br>
neexistuju, len kus pamate na ktory ukazuje smernik). Tie sa
daju<br>
spajat trebars cez funckiu strcat, alebo mozno povedzme aj
sprintf-om<br>
(ma vacsie moznosti, ale tazkopadnejsia metoda).<br>
<div>
<div class="m_5409446531146029777h5"><br>
2017-10-31 12:11 GMT+01:00 hwnews konference <<a href="mailto:hwnews@cncnet.info" target="_blank">hwnews@cncnet.info</a>>:<br>
> Zdravim,<br>
><br>
> delam si ten palubni budik na lod s e-ink
displejem a ESP32. Ohybam nejake<br>
> knihovny, ktere jsou v examplech...na displej uz
kreslim, web mi take jede,<br>
> ale zasekl jsem se na pro me nepochopitelne
definici procedury:<br>
><br>
> void DrawStringAt(int x, int y, const char* text,
sFONT* font, int colored);<br>
><br>
> ja jsem tu deklaraci puvodne nezkoumal, protoze
primo vlozeny string jako<br>
> parametr fungoval<br>
><br>
> Kdyz jsem to ale chtel pouzit takto tak jsem si
nabehnul:<br>
><br>
> for (uint8_t i=0; i<server.args(); i++){<br>
> rv_text = server.argName(i) + ": " +
server.arg(i);<br>
> message += " " + rv_text+ "\n";<br>
> paint.DrawStringAt(0, 0, rv_text, &Font8,
UNCOLORED);<br>
> epd.SetPartialWindow(paint.Ge<wbr>tImage(), 0,
20+(i*12), paint.GetWidth(),<br>
> paint.GetHeight());<br>
> }<br>
><br>
><br>
> void DrawStringAt(int x, int y, const char* text,
sFONT* font, int colored);<br>
>
^<br>
> epdpaint.h:56:10: note: no known conversion for
argument 3 from 'String'<br>
> to 'const char*'<br>
><br>
> cela ta procedura je napsana takto:<br>
><br>
> void Paint::DrawStringAt(int x, int y, const char*
text, sFONT* font, int<br>
> colored) {<br>
> const char* p_text = text;<br>
> unsigned int counter = 0;<br>
> int refcolumn = x;<br>
><br>
> /* Send the string character by character on
EPD */<br>
> while (*p_text != 0) {<br>
> /* Display one character on EPD */<br>
> DrawCharAt(refcolumn, y, *p_text, font,
colored);<br>
> /* Decrement the column position by 16 */<br>
> refcolumn += font->Width;<br>
> /* Point on the next character */<br>
> p_text++;<br>
> counter++;<br>
> }<br>
> }<br>
><br>
> Jak by se to melo upravit abyto bylo koser?<br>
><br>
> RV<br>
><br>
</div>
</div>
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