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Import irrlicht 1.8.4 release
2020-05-16 23:31:28 +02:00
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Irrlicht 3D Engine: Tutorial 24: CursorControl</title>
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<div class="title">Tutorial 24: CursorControl </div> </div>
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<img src="024shot.jpg" alt="024shot.jpg"/>
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<p>Show how to modify cursors and offer some useful tool-functions for creating cursors. It can also be used for experiments with the mouse in general. </p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">#include &lt;<a class="code" href="irrlicht_8h.html" title="Main header file of the irrlicht, the only file needed to include.">irrlicht.h</a>&gt;</span>
<span class="preprocessor">#include &quot;<a class="code" href="driver_choice_8h.html">driverChoice.h</a>&quot;</span>
<span class="keyword">using namespace </span>irr;
<span class="keyword">using namespace </span>core;
<span class="keyword">using namespace </span>scene;
<span class="keyword">using namespace </span>video;
<span class="keyword">using namespace </span>io;
<span class="keyword">using namespace </span>gui;
<span class="preprocessor">#ifdef _IRR_WINDOWS_</span>
<span class="preprocessor"></span><span class="preprocessor">#pragma comment(lib, &quot;Irrlicht.lib&quot;)</span>
<span class="preprocessor"></span><span class="preprocessor">#endif</span>
<span class="preprocessor"></span>
<span class="keyword">const</span> <span class="keywordtype">int</span> DELAY_TIME = 3000;
<span class="keyword">enum</span> ETimerAction
{
ETA_MOUSE_VISIBLE,
ETA_MOUSE_INVISIBLE,
};
</pre></div><p>Structure to allow delayed execution of some actions. </p>
<div class="fragment"><pre class="fragment"><span class="keyword">struct </span>TimerAction
{
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> TargetTime;
ETimerAction Action;
};
</pre></div><div class="fragment"><pre class="fragment"><span class="keyword">struct </span>SAppContext
{
SAppContext()
: Device(0), InfoStatic(0), EventBox(0), CursorBox(0), SpriteBox(0)
, ButtonSetVisible(0), ButtonSetInvisible(0), ButtonSimulateBadFps(0)
, ButtonChangeIcon(0)
, SimulateBadFps(false)
{
}
<span class="keywordtype">void</span> update()
{
<span class="keywordflow">if</span> (!Device)
<span class="keywordflow">return</span>;
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> timeNow = Device-&gt;getTimer()-&gt;getTime();
<span class="keywordflow">for</span> ( <a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> i=0; i &lt; TimerActions.size(); ++i )
{
<span class="keywordflow">if</span> ( timeNow &gt;= TimerActions[i].TargetTime )
{
runTimerAction(TimerActions[i]);
TimerActions.erase(i);
}
<span class="keywordflow">else</span>
{
++i;
}
}
}
<span class="keywordtype">void</span> runTimerAction(<span class="keyword">const</span> TimerAction&amp; action)
{
<span class="keywordflow">if</span> (ETA_MOUSE_VISIBLE == action.Action)
{
Device-&gt;getCursorControl()-&gt;setVisible(<span class="keyword">true</span>);
ButtonSetVisible-&gt;setEnabled(<span class="keyword">true</span>);
}
<span class="keywordflow">else</span> <span class="keywordflow">if</span> ( ETA_MOUSE_INVISIBLE == action.Action)
{
Device-&gt;getCursorControl()-&gt;setVisible(<span class="keyword">false</span>);
ButtonSetInvisible-&gt;setEnabled(<span class="keyword">true</span>);
}
}
</pre></div><p>Add another icon which the user can click and select as cursor later on. </p>
<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> addIcon(<span class="keyword">const</span> <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>&amp; name, <span class="keyword">const</span> SCursorSprite &amp;sprite, <span class="keywordtype">bool</span> addCursor=<span class="keyword">true</span>)
{
<span class="comment">// Sprites are just icons - not yet cursors. They can be displayed by Irrlicht sprite functions and be used to create cursors.</span>
SpriteBox-&gt;addItem(name.c_str(), sprite.SpriteId);
Sprites.push_back(sprite);
<span class="comment">// create the cursor together with the icon?</span>
<span class="keywordflow">if</span> ( addCursor )
{
</pre></div><p> Here we create a hardware cursor from a sprite </p>
<div class="fragment"><pre class="fragment"> Device-&gt;getCursorControl()-&gt;addIcon(sprite);
<span class="comment">// ... and add it to the cursors selection listbox to the other system cursors.</span>
CursorBox-&gt;addItem(name.c_str());
}
}
IrrlichtDevice * Device;
gui::IGUIStaticText * InfoStatic;
gui::IGUIListBox * EventBox;
gui::IGUIListBox * CursorBox;
gui::IGUIListBox * SpriteBox;
gui::IGUIButton * ButtonSetVisible;
gui::IGUIButton * ButtonSetInvisible;
gui::IGUIButton * ButtonSimulateBadFps;
gui::IGUIButton * ButtonChangeIcon;
array&lt;TimerAction&gt; TimerActions;
<span class="keywordtype">bool</span> SimulateBadFps;
array&lt;SCursorSprite&gt; Sprites;
};
</pre></div><p>Helper function to print mouse event names into a stringw </p>
<div class="fragment"><pre class="fragment"><span class="keywordtype">void</span> PrintMouseEventName(<span class="keyword">const</span> SEvent&amp; event, <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a> &amp;result)
{
<span class="keywordflow">switch</span> ( event.MouseInput.Event )
{
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa3f551814f5f38596ea1f3ed7c6c7bad7" title="Left mouse button was pressed down.">EMIE_LMOUSE_PRESSED_DOWN</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_LMOUSE_PRESSED_DOWN&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fab54734344dc9cc7c00b33afcc6443575" title="Right mouse button was pressed down.">EMIE_RMOUSE_PRESSED_DOWN</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_RMOUSE_PRESSED_DOWN&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa3daff77552ab92abc317afe09b41bc76" title="Middle mouse button was pressed down.">EMIE_MMOUSE_PRESSED_DOWN</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_MMOUSE_PRESSED_DOWN&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa26d91b99a8912ff622133f02c60f306a" title="Left mouse button was left up.">EMIE_LMOUSE_LEFT_UP</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_LMOUSE_LEFT_UP&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fadb92d5c1011534b2b18065573182d9f4" title="Right mouse button was left up.">EMIE_RMOUSE_LEFT_UP</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_RMOUSE_LEFT_UP&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa13e6b5b0964334f1dbefae9848dc26df" title="Middle mouse button was left up.">EMIE_MMOUSE_LEFT_UP</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_MMOUSE_LEFT_UP&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fae3288f42ed4b8372853c1822bbc0a7a1" title="The mouse cursor changed its position.">EMIE_MOUSE_MOVED</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_MOUSE_MOVED&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fad091f4f4144d57e46be11b029c3c6720">EMIE_MOUSE_WHEEL</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_MOUSE_WHEEL&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa689d3c959226829a85d5dc005400c7ce">EMIE_LMOUSE_DOUBLE_CLICK</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_LMOUSE_DOUBLE_CLICK&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa90865e216488a0a92c030f220a5a69d6">EMIE_RMOUSE_DOUBLE_CLICK</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_RMOUSE_DOUBLE_CLICK&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa89b46e2e0e79ee26d9c2478ebe1dd9ee">EMIE_MMOUSE_DOUBLE_CLICK</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_MMOUSE_DOUBLE_CLICK&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa1145828528f7999720df3dd10a3a7de3">EMIE_LMOUSE_TRIPLE_CLICK</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_LMOUSE_TRIPLE_CLICK&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fab24cbd2197b888022531799561c12b49">EMIE_RMOUSE_TRIPLE_CLICK</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_RMOUSE_TRIPLE_CLICK&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fa72b90a632c6063a6f8e2fbf26187c9c6">EMIE_MMOUSE_TRIPLE_CLICK</a>: result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;EMIE_MMOUSE_TRIPLE_CLICK&quot;</span>); <span class="keywordflow">break</span>;
<span class="keywordflow">default</span>:
<span class="keywordflow">break</span>;
}
}
</pre></div><p>Helper function to print all the state information which get from a mouse-event into a stringw </p>
<div class="fragment"><pre class="fragment"><span class="keywordtype">void</span> PrintMouseState(<span class="keyword">const</span> SEvent&amp; event, <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a> &amp;result)
{
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;X: &quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(event.MouseInput.X);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;Y: &quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(event.MouseInput.Y);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;Wheel: &quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(event.MouseInput.Wheel);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;Shift: &quot;</span>);
<span class="keywordflow">if</span> ( event.MouseInput.Shift )
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;true\n&quot;</span>);
<span class="keywordflow">else</span>
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;false\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;Control: &quot;</span>);
<span class="keywordflow">if</span> ( event.MouseInput.Control )
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;true\n&quot;</span>);
<span class="keywordflow">else</span>
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;false\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;ButtonStates: &quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(event.MouseInput.ButtonStates);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;isLeftPressed: &quot;</span>);
<span class="keywordflow">if</span> ( event.MouseInput.isLeftPressed() )
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;true\n&quot;</span>);
<span class="keywordflow">else</span>
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;false\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;isRightPressed: &quot;</span>);
<span class="keywordflow">if</span> ( event.MouseInput.isRightPressed() )
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;true\n&quot;</span>);
<span class="keywordflow">else</span>
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;false\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;isMiddlePressed: &quot;</span>);
<span class="keywordflow">if</span> ( event.MouseInput.isMiddlePressed() )
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;true\n&quot;</span>);
<span class="keywordflow">else</span>
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;false\n&quot;</span>);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;Event: &quot;</span>);
PrintMouseEventName(event, result);
result += <a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>(L<span class="stringliteral">&quot;\n&quot;</span>);
}
</pre></div><p>A typical event receiver. </p>
<div class="fragment"><pre class="fragment"><span class="keyword">class </span>MyEventReceiver : <span class="keyword">public</span> IEventReceiver
{
<span class="keyword">public</span>:
MyEventReceiver(SAppContext &amp; context) : Context(context) { }
<span class="keyword">virtual</span> <span class="keywordtype">bool</span> OnEvent(<span class="keyword">const</span> SEvent&amp; event)
{
<span class="keywordflow">if</span> (event.EventType == <a class="code" href="namespaceirr.html#ac9eed96e06e85ce3c86fcbbbe9e48a0cae85bb44dd09a29c879d64a05047fc1d2" title="An event of the graphical user interface.">EET_GUI_EVENT</a> )
{
<span class="keywordflow">switch</span> ( event.GUIEvent.EventType )
{
<span class="keywordflow">case</span> <a class="code" href="namespaceirr_1_1gui.html#aeac71ad17341a4b6e9026ae11d576808a308ee345c92444931f83e48354072d98" title="A button was clicked.">EGET_BUTTON_CLICKED</a>:
{
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> timeNow = Context.Device-&gt;getTimer()-&gt;getTime();
TimerAction action;
action.TargetTime = timeNow + DELAY_TIME;
<span class="keywordflow">if</span> ( event.GUIEvent.Caller == Context.ButtonSetVisible )
{
action.Action = ETA_MOUSE_VISIBLE;
Context.TimerActions.push_back(action);
Context.ButtonSetVisible-&gt;setEnabled(<span class="keyword">false</span>);
}
<span class="keywordflow">else</span> <span class="keywordflow">if</span> ( event.GUIEvent.Caller == Context.ButtonSetInvisible )
{
action.Action = ETA_MOUSE_INVISIBLE;
Context.TimerActions.push_back(action);
Context.ButtonSetInvisible-&gt;setEnabled(<span class="keyword">false</span>);
}
<span class="keywordflow">else</span> <span class="keywordflow">if</span> ( event.GUIEvent.Caller == Context.ButtonSimulateBadFps )
{
Context.SimulateBadFps = Context.ButtonSimulateBadFps-&gt;isPressed();
}
<span class="keywordflow">else</span> <span class="keywordflow">if</span> ( event.GUIEvent.Caller == Context.ButtonChangeIcon )
{
</pre></div><p>Replace an existing cursor icon by another icon. The user has to select both - the icon which should be replaced and the icon which will replace it. </p>
<div class="fragment"><pre class="fragment"> <a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> selectedCursor = Context.CursorBox-&gt;getSelected();
<a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> selectedSprite = Context.SpriteBox-&gt;getSelected();
<span class="keywordflow">if</span> ( selectedCursor &gt;= 0 &amp;&amp; selectedSprite &gt;= 0 )
{
</pre></div><p>This does replace the icon. </p>
<div class="fragment"><pre class="fragment"> Context.Device-&gt;getCursorControl()-&gt;changeIcon((<a class="code" href="namespaceirr_1_1gui.html#aefee802dd632c5735703e40ef40f879b" title="Default icons for cursors.">ECURSOR_ICON</a>)selectedCursor, Context.Sprites[selectedSprite] );
</pre></div><p>Do also show the new icon. </p>
<div class="fragment"><pre class="fragment"> Context.Device-&gt;getCursorControl()-&gt;setActiveIcon( <a class="code" href="namespaceirr_1_1gui.html#aefee802dd632c5735703e40ef40f879b" title="Default icons for cursors.">ECURSOR_ICON</a>(selectedCursor) );
}
}
}
<span class="keywordflow">break</span>;
<span class="keywordflow">case</span> <a class="code" href="namespaceirr_1_1gui.html#aeac71ad17341a4b6e9026ae11d576808ac4834bd158653766be139a322de519aa" title="A new item in a listbox was selected.">EGET_LISTBOX_CHANGED</a>:
<span class="keywordflow">case</span> <a class="code" href="namespaceirr_1_1gui.html#aeac71ad17341a4b6e9026ae11d576808a3f3c374a3c74405ee3eac6973e78345f" title="An item in the listbox was selected, which was already selected.">EGET_LISTBOX_SELECTED_AGAIN</a>:
{
<span class="keywordflow">if</span> ( event.GUIEvent.Caller == Context.CursorBox )
{
</pre></div><p>Find out which cursor the user selected </p>
<div class="fragment"><pre class="fragment"> <a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> selected = Context.CursorBox-&gt;getSelected();
<span class="keywordflow">if</span> ( selected &gt;= 0 )
{
</pre></div><p>Here we set the new cursor icon which will now be used within our window. </p>
<div class="fragment"><pre class="fragment"> Context.Device-&gt;getCursorControl()-&gt;setActiveIcon( <a class="code" href="namespaceirr_1_1gui.html#aefee802dd632c5735703e40ef40f879b" title="Default icons for cursors.">ECURSOR_ICON</a>(selected) );
}
}
}
<span class="keywordflow">break</span>;
<span class="keywordflow">default</span>:
<span class="keywordflow">break</span>;
}
}
<span class="keywordflow">if</span> (event.EventType == <a class="code" href="namespaceirr.html#ac9eed96e06e85ce3c86fcbbbe9e48a0caa230b748674e074aa67f661819ad5891" title="A mouse input event.">EET_MOUSE_INPUT_EVENT</a>)
{
<a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a> infoText;
PrintMouseState(event, infoText);
Context.InfoStatic-&gt;setText(infoText.c_str());
<span class="keywordflow">if</span> ( event.MouseInput.Event != <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fae3288f42ed4b8372853c1822bbc0a7a1" title="The mouse cursor changed its position.">EMIE_MOUSE_MOVED</a> &amp;&amp; event.MouseInput.Event != <a class="code" href="namespaceirr.html#a2dbf2a247aa17a9eeefbbf36ebd5739fad091f4f4144d57e46be11b029c3c6720">EMIE_MOUSE_WHEEL</a> ) <span class="comment">// no spam</span>
{
infoText = L<span class="stringliteral">&quot;&quot;</span>;
PrintMouseEventName(event, infoText);
Context.EventBox-&gt;insertItem(0, infoText.c_str(), -1);
}
}
<span class="keywordflow">return</span> <span class="keyword">false</span>;
}
<span class="keyword">private</span>:
SAppContext &amp; Context;
};
</pre></div><p>Use several imagefiles as animation frames for a sprite which can be used as cursor icon. The images in those files all need to have the same size. Return sprite index on success or -1 on failure </p>
<div class="fragment"><pre class="fragment"><a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> AddAnimatedIconToSpriteBank( gui::IGUISpriteBank * spriteBank, video::IVideoDriver* driver, <span class="keyword">const</span> array&lt; io::path &gt;&amp; files, <a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> frameTime )
{
<span class="keywordflow">if</span> ( !spriteBank || !driver || !files.size() )
<span class="keywordflow">return</span> -1;
video::ITexture * tex = driver-&gt;getTexture( files[0] );
<span class="keywordflow">if</span> ( tex )
{
array&lt; rect&lt;s32&gt; &gt;&amp; spritePositions = spriteBank-&gt;getPositions();
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> idxRect = spritePositions.size();
spritePositions.push_back( rect&lt;s32&gt;(0,0, tex-&gt;getSize().Width, tex-&gt;getSize().Height) );
SGUISprite sprite;
sprite.frameTime = frameTime;
array&lt; SGUISprite &gt;&amp; sprites = spriteBank-&gt;getSprites();
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> startIdx = spriteBank-&gt;getTextureCount();
<span class="keywordflow">for</span> ( <a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> f=0; f &lt; files.size(); ++f )
{
tex = driver-&gt;getTexture( files[f] );
<span class="keywordflow">if</span> ( tex )
{
spriteBank-&gt;addTexture( driver-&gt;getTexture(files[f]) );
gui::SGUISpriteFrame frame;
frame.rectNumber = idxRect;
frame.textureNumber = startIdx+f;
sprite.Frames.push_back( frame );
}
}
sprites.push_back( sprite );
<span class="keywordflow">return</span> sprites.size()-1;
}
<span class="keywordflow">return</span> -1;
}
</pre></div><p>Use several images within one imagefile as animation frames for a sprite which can be used as cursor icon The sizes of the icons within that file all need to have the same size Return sprite index on success or -1 on failure </p>
<div class="fragment"><pre class="fragment"><a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> AddAnimatedIconToSpriteBank( gui::IGUISpriteBank * spriteBank, video::IVideoDriver* driver, <span class="keyword">const</span> <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>&amp; file, <span class="keyword">const</span> array&lt; rect&lt;s32&gt; &gt;&amp; rects, <a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> frameTime )
{
<span class="keywordflow">if</span> ( !spriteBank || !driver || !rects.size() )
<span class="keywordflow">return</span> -1;
video::ITexture * tex = driver-&gt;getTexture( file );
<span class="keywordflow">if</span> ( tex )
{
array&lt; rect&lt;s32&gt; &gt;&amp; spritePositions = spriteBank-&gt;getPositions();
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> idxRect = spritePositions.size();
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> idxTex = spriteBank-&gt;getTextureCount();
spriteBank-&gt;addTexture( tex );
SGUISprite sprite;
sprite.frameTime = frameTime;
array&lt; SGUISprite &gt;&amp; sprites = spriteBank-&gt;getSprites();
<span class="keywordflow">for</span> ( <a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> i=0; i &lt; rects.size(); ++i )
{
spritePositions.push_back( rects[i] );
gui::SGUISpriteFrame frame;
frame.rectNumber = idxRect+i;
frame.textureNumber = idxTex;
sprite.Frames.push_back( frame );
}
sprites.push_back( sprite );
<span class="keywordflow">return</span> sprites.size()-1;
}
<span class="keywordflow">return</span> -1;
}
</pre></div><p>Create a non-animated icon from the given file and position and put it into the spritebank. We can use this icon later on in a cursor. </p>
<div class="fragment"><pre class="fragment"><a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> AddIconToSpriteBank( gui::IGUISpriteBank * spriteBank, video::IVideoDriver* driver, <span class="keyword">const</span> <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>&amp; file, <span class="keyword">const</span> core::rect&lt;s32&gt;&amp; rect )
{
<span class="keywordflow">if</span> ( !spriteBank || !driver )
<span class="keywordflow">return</span> -1;
video::ITexture * tex = driver-&gt;getTexture( file );
<span class="keywordflow">if</span> ( tex )
{
core::array&lt; core::rect&lt;irr::s32&gt; &gt;&amp; spritePositions = spriteBank-&gt;getPositions();
spritePositions.push_back( rect );
array&lt; SGUISprite &gt;&amp; sprites = spriteBank-&gt;getSprites();
spriteBank-&gt;addTexture( tex );
gui::SGUISpriteFrame frame;
frame.rectNumber = spritePositions.size()-1;
frame.textureNumber = spriteBank-&gt;getTextureCount()-1;
SGUISprite sprite;
sprite.frameTime = 0;
sprite.Frames.push_back( frame );
sprites.push_back( sprite );
<span class="keywordflow">return</span> sprites.size()-1;
}
<span class="keywordflow">return</span> -1;
}
<span class="keywordtype">int</span> main()
{
<a class="code" href="namespaceirr_1_1video.html#ae35a6de6d436c76107ad157fe42356d0" title="An enum for all types of drivers the Irrlicht Engine supports.">video::E_DRIVER_TYPE</a> driverType = driverChoiceConsole();
<span class="keywordflow">if</span> (driverType==<a class="code" href="namespaceirr_1_1video.html#ae35a6de6d436c76107ad157fe42356d0ae685cada50f8c100403134d932d0414c" title="No driver, just for counting the elements.">video::EDT_COUNT</a>)
<span class="keywordflow">return</span> 1;
IrrlichtDevice * device = <a class="code" href="namespaceirr.html#abaf4d8719cc26b0d30813abf85e47c76" title="Creates an Irrlicht device. The Irrlicht device is the root object for using the engine.">createDevice</a>(driverType, dimension2d&lt;u32&gt;(640, 480));
<span class="keywordflow">if</span> (device == 0)
<span class="keywordflow">return</span> 1; <span class="comment">// could not create selected driver.</span>
<span class="comment">// It&#39;s sometimes of interest to know how the mouse behaves after a resize</span>
device-&gt;setResizable(<span class="keyword">true</span>);
device-&gt;setWindowCaption(L<span class="stringliteral">&quot;Cursor control - Irrlicht engine tutorial&quot;</span>);
video::IVideoDriver* driver = device-&gt;getVideoDriver();
IGUIEnvironment* env = device-&gt;getGUIEnvironment();
gui::IGUISpriteBank * SpriteBankIcons;
SAppContext context;
context.Device = device;
rect&lt; s32 &gt; rectInfoStatic(10,10, 200, 200);
env-&gt;addStaticText (L<span class="stringliteral">&quot;Cursor state information&quot;</span>, rectInfoStatic, <span class="keyword">true</span>, <span class="keyword">true</span>);
rectInfoStatic.UpperLeftCorner += <a class="code" href="namespaceirr_1_1core.html#ac79bc3704cf28bc1ab72d7cd1cae78d1" title="Typedef for an integer dimension.">dimension2di</a>(0, 15);
context.InfoStatic = env-&gt;addStaticText (L<span class="stringliteral">&quot;&quot;</span>, rectInfoStatic, <span class="keyword">true</span>, <span class="keyword">true</span>);
rect&lt; s32 &gt; rectEventBox(10,210, 200, 400);
env-&gt;addStaticText (L<span class="stringliteral">&quot;click events (new on top)&quot;</span>, rectEventBox, <span class="keyword">true</span>, <span class="keyword">true</span>);
rectEventBox.UpperLeftCorner += <a class="code" href="namespaceirr_1_1core.html#ac79bc3704cf28bc1ab72d7cd1cae78d1" title="Typedef for an integer dimension.">dimension2di</a>(0, 15);
context.EventBox = env-&gt;addListBox(rectEventBox);
rect&lt; s32 &gt; rectCursorBox(210,10, 400, 250);
env-&gt;addStaticText (L<span class="stringliteral">&quot;cursors, click to set the active one&quot;</span>, rectCursorBox, <span class="keyword">true</span>, <span class="keyword">true</span>);
rectCursorBox.UpperLeftCorner += <a class="code" href="namespaceirr_1_1core.html#ac79bc3704cf28bc1ab72d7cd1cae78d1" title="Typedef for an integer dimension.">dimension2di</a>(0, 15);
context.CursorBox = env-&gt;addListBox(rectCursorBox);
rect&lt; s32 &gt; rectSpriteBox(210,260, 400, 400);
env-&gt;addStaticText (L<span class="stringliteral">&quot;sprites&quot;</span>, rectSpriteBox, <span class="keyword">true</span>, <span class="keyword">true</span>);
rectSpriteBox.UpperLeftCorner += <a class="code" href="namespaceirr_1_1core.html#ac79bc3704cf28bc1ab72d7cd1cae78d1" title="Typedef for an integer dimension.">dimension2di</a>(0, 15);
context.SpriteBox = env-&gt;addListBox(rectSpriteBox);
context.ButtonSetVisible = env-&gt;addButton( rect&lt;s32&gt;( 410, 20, 560, 40 ), 0, -1, L<span class="stringliteral">&quot;set visible (delayed)&quot;</span> );
context.ButtonSetInvisible = env-&gt;addButton( rect&lt;s32&gt;( 410, 50, 560, 70 ), 0, -1, L<span class="stringliteral">&quot;set invisible (delayed)&quot;</span> );
context.ButtonSimulateBadFps = env-&gt;addButton( rect&lt;s32&gt;( 410, 80, 560, 100 ), 0, -1, L<span class="stringliteral">&quot;simulate bad FPS&quot;</span> );
context.ButtonSimulateBadFps-&gt;setIsPushButton(<span class="keyword">true</span>);
context.ButtonChangeIcon = env-&gt;addButton( rect&lt;s32&gt;( 410, 140, 560, 160 ), 0, -1, L<span class="stringliteral">&quot;replace cursor icon\n(cursor+sprite must be selected)&quot;</span> );
<span class="comment">// set the names for all the system cursors</span>
<span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i=0; i &lt; (int)<a class="code" href="namespaceirr_1_1gui.html#aefee802dd632c5735703e40ef40f879ba4960196a815443cf827e58ca48232583">gui::ECI_COUNT</a>; ++i )
{
context.CursorBox-&gt;addItem(<a class="code" href="namespaceirr_1_1core.html#aef83fafbb1b36fcce44c07c9be23a7f2" title="Typedef for wide character strings.">stringw</a>( <a class="code" href="namespaceirr_1_1gui.html#a33bd57d04dbf92750f64a244df85cd51" title="Names for ECURSOR_ICON.">GUICursorIconNames</a>[i] ).c_str());
}
</pre></div><p>Create sprites which then can be used as cursor icons. </p>
<div class="fragment"><pre class="fragment"> SpriteBankIcons = env-&gt;addEmptySpriteBank(<a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;cursor_icons&quot;</span>));
context.SpriteBox-&gt;setSpriteBank(SpriteBankIcons);
<span class="comment">// create one animated icon from several files</span>
array&lt; io::path &gt; files;
files.push_back( <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16bw1.png&quot;</span>) );
files.push_back( <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16bw2.png&quot;</span>) );
files.push_back( <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16bw3.png&quot;</span>) );
files.push_back( <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16bw3.png&quot;</span>) );
files.push_back( <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16bw2.png&quot;</span>) );
SCursorSprite spriteBw; <span class="comment">// the sprite + some additional information needed for cursors</span>
spriteBw.SpriteId = AddAnimatedIconToSpriteBank( SpriteBankIcons, driver, files, 200 );
spriteBw.SpriteBank = SpriteBankIcons;
spriteBw.HotSpot = position2d&lt;s32&gt;(7,7);
context.addIcon(L<span class="stringliteral">&quot;crosshair_bw&quot;</span>, spriteBw);
<span class="comment">// create one animated icon from one file</span>
array&lt; rect&lt;s32&gt; &gt; iconRects;
iconRects.push_back( rect&lt;s32&gt;(0,0, 16, 16) );
iconRects.push_back( rect&lt;s32&gt;(16,0, 32, 16) );
iconRects.push_back( rect&lt;s32&gt;(0,16, 16, 32) );
iconRects.push_back( rect&lt;s32&gt;(0,16, 16, 32) );
iconRects.push_back( rect&lt;s32&gt;(16,0, 32, 16) );
SCursorSprite spriteCol; <span class="comment">// the sprite + some additional information needed for cursors</span>
spriteCol.SpriteId = AddAnimatedIconToSpriteBank( SpriteBankIcons, driver, <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16col.png&quot;</span>), iconRects, 200 );
spriteCol.HotSpot = position2d&lt;s32&gt;(7,7);
spriteCol.SpriteBank = SpriteBankIcons;
context.addIcon(L<span class="stringliteral">&quot;crosshair_colored&quot;</span>, spriteCol);
<span class="comment">// Create some non-animated icons</span>
rect&lt;s32&gt; rectIcon;
SCursorSprite spriteNonAnimated(SpriteBankIcons, 0, position2d&lt;s32&gt;(7,7));
rectIcon = rect&lt;s32&gt;(0,0, 16, 16);
spriteNonAnimated.SpriteId = AddIconToSpriteBank( SpriteBankIcons, driver, <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16col.png&quot;</span>), rectIcon );
context.addIcon(L<span class="stringliteral">&quot;crosshair_col1&quot;</span>, spriteNonAnimated, <span class="keyword">false</span>);
rectIcon = rect&lt;s32&gt;(16,0, 32, 16);
spriteNonAnimated.SpriteId = AddIconToSpriteBank( SpriteBankIcons, driver, <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16col.png&quot;</span>), rectIcon );
context.addIcon(L<span class="stringliteral">&quot;crosshair_col2&quot;</span>, spriteNonAnimated, <span class="keyword">false</span>);
rectIcon = rect&lt;s32&gt;(0,16, 16, 32);
spriteNonAnimated.SpriteId = AddIconToSpriteBank( SpriteBankIcons, driver, <a class="code" href="namespaceirr_1_1io.html#ab1bdc45edb3f94d8319c02bc0f840ee1" title="Type used for all file system related strings.">io::path</a>(<span class="stringliteral">&quot;../../media/icon_crosshairs16x16col.png&quot;</span>), rectIcon );
context.addIcon(L<span class="stringliteral">&quot;crosshair_col3&quot;</span>, spriteNonAnimated, <span class="keyword">false</span>);
MyEventReceiver receiver(context);
device-&gt;setEventReceiver(&amp;receiver);
<span class="keywordflow">while</span>(device-&gt;run() &amp;&amp; driver)
{
<span class="comment">// if (device-&gt;isWindowActive())</span>
{
<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a> realTimeNow = device-&gt;getTimer()-&gt;getRealTime();
context.update();
driver-&gt;beginScene(<span class="keyword">true</span>, <span class="keyword">true</span>, SColor(0,200,200,200));
env-&gt;drawAll();
<span class="comment">// draw custom sprite with Irrlicht functions for comparison. It should usually look the same as the cursors.</span>
<span class="keywordflow">if</span> ( context.SpriteBox )
{
<a class="code" href="namespaceirr.html#ac66849b7a6ed16e30ebede579f9b47c6" title="32 bit signed variable.">s32</a> selectedSprite = context.SpriteBox-&gt;getSelected();
<span class="keywordflow">if</span> ( selectedSprite &gt;= 0 &amp;&amp; context.Sprites[selectedSprite].SpriteId &gt;= 0 )
{
SpriteBankIcons-&gt;draw2DSprite(<a class="code" href="namespaceirr.html#a0416a53257075833e7002efd0a18e804" title="32 bit unsigned variable.">u32</a>(context.Sprites[selectedSprite].SpriteId), <a class="code" href="namespaceirr_1_1core.html#a3643c2cc7820dd78cd87e73a46b92145">position2di</a>(580, 140), 0, video::SColor(255, 255, 255, 255), 0, realTimeNow);
}
}
driver-&gt;endScene();
}
<span class="comment">// By simulating bad fps we can find out if hardware-support for cursors works or not. If it works the cursor will move as usual,while it otherwise will just update with 2 fps now.</span>
<span class="keywordflow">if</span> ( context.SimulateBadFps )
{
device-&gt;sleep(500); <span class="comment">// 2 fps</span>
}
<span class="keywordflow">else</span>
{
device-&gt;sleep(10);
}
}
device-&gt;drop();
<span class="keywordflow">return</span> 0;
}
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