[Bildung] Kampf der Toolkits

**nudelsalat** · 15.11.2006 20:08

Zitat von mq

Okay, ich hab da mal was haessliches hingerotzt.

#2
Ich poste mal nicht den gesamten Code, sondern nur die CEGUI-Relevanten Stellen.

Die XML-Datei mit dem GUI-Layout. Die GUI in C++ zu schreiben ist zwar möglich aber meistens nicht Sinnvoll.

Code:

<?xml version="1.0" encoding="UTF-8"?>
<GUILayout>
  <Window Type="DefaultWindow" Name="root" >
    <Property Name="UnifiedAreaRect" Value="{{0,0},{0,0},{1,0},{1,0}}" />
    
    <Window Type="TaharezLook/FrameWindow" Name="fwRechner" >
      <Property Name="Text" Value="Toller Taschenrechner 2000" />
      <Property Name="TitlebarEnabled" Value="True" />
      <Property Name="TitlebarFont" Value="Commonwealth-10" />
      <Property Name="UnifiedAreaRect" Value="{{0.5,-100},{0.5,-100},{0.5,100},{0.5,100}}" />

      <Window Type="TaharezLook/Editbox" Name="fwRechner/eingabefeld" >
        <Property Name="Text" Value="0" />
        <Property Name="UnifiedPosition" Value="{{0.04,0},{0.15,0}}" />
        <Property Name="UnifiedSize" Value="{{0.92,0},{0.10,0}}" />
      </Window>
      
      <Window Type="TaharezLook/Button" Name="fwRechner/clear" >
        <Property Name="Text" Value="C" />
        <Property Name="UnifiedPosition" Value="{{0.04,0},{0.30,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/pm" >
        <Property Name="Text" Value="+/-" />
        <Property Name="UnifiedPosition" Value="{{0.28,0},{0.30,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/division" >
        <Property Name="Text" Value="/" />
        <Property Name="UnifiedPosition" Value="{{0.52,0},{0.30,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/multiplikation" >
        <Property Name="Text" Value="x" />
        <Property Name="UnifiedPosition" Value="{{0.76,0},{0.30,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>

      <Window Type="TaharezLook/Button" Name="fwRechner/7" >
        <Property Name="Text" Value="7" />
        <Property Name="UnifiedPosition" Value="{{0.04,0},{0.44,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/8" >
        <Property Name="Text" Value="8" />
        <Property Name="UnifiedPosition" Value="{{0.28,0},{0.44,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/9" >
        <Property Name="Text" Value="9" />
        <Property Name="UnifiedPosition" Value="{{0.52,0},{0.44,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/-" >
        <Property Name="Text" Value="-" />
        <Property Name="UnifiedPosition" Value="{{0.76,0},{0.44,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>

      <Window Type="TaharezLook/Button" Name="fwRechner/4" >
        <Property Name="Text" Value="4" />
        <Property Name="UnifiedPosition" Value="{{0.04,0},{0.58,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/5" >
        <Property Name="Text" Value="5" />
        <Property Name="UnifiedPosition" Value="{{0.28,0},{0.58,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/6" >
        <Property Name="Text" Value="6" />
        <Property Name="UnifiedPosition" Value="{{0.52,0},{0.58,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/+" >
        <Property Name="Text" Value="+" />
        <Property Name="UnifiedPosition" Value="{{0.76,0},{0.58,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>

      <Window Type="TaharezLook/Button" Name="fwRechner/1" >
        <Property Name="Text" Value="1" />
        <Property Name="UnifiedPosition" Value="{{0.04,0},{0.72,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/2" >
        <Property Name="Text" Value="2" />
        <Property Name="UnifiedPosition" Value="{{0.28,0},{0.72,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/3" >
        <Property Name="Text" Value="3" />
        <Property Name="UnifiedPosition" Value="{{0.52,0},{0.72,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/=" >
        <Property Name="Text" Value="=" />
        <Property Name="UnifiedPosition" Value="{{0.76,0},{0.72,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.25,0}}" />
      </Window>

      <Window Type="TaharezLook/Button" Name="fwRechner/0" >
        <Property Name="Text" Value="0" />
        <Property Name="UnifiedPosition" Value="{{0.04,0},{0.86,0}}" />
        <Property Name="UnifiedSize" Value="{{0.44,0},{0.10,0}}" />
      </Window>
      <Window Type="TaharezLook/Button" Name="fwRechner/." >
        <Property Name="Text" Value="." />
        <Property Name="UnifiedPosition" Value="{{0.52,0},{0.86,0}}" />
        <Property Name="UnifiedSize" Value="{{0.2,0},{0.10,0}}" />
      </Window>
      
      
      
    </Window>
  </Window>
</GUILayout>

Erstellen des CEGUI Renderers und Systems, laden des Skins, zuweisen eines Standard Mouse Cursor Bildes und laden des GUI-Layouts aus der XML-Datei. In *.scheme können font, lookNFeels und imageset festgelegt werden. In imagesets wird die Position von GUI-Elementen ,bzw. Einzelteilen aus denen sich die Elemente zusammensetzen, in einer Bildatei angegeben. In *.looknfeel wird festgelegt, aus welchen Bildern ein bestimmtes GUI-Element besteht und wo sie sich befinden.

Code:

mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY, false, 3000, mSceneMgr);
mGUISystem = new CEGUI::System(mGUIRenderer);

    CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLookSkin.scheme");
CEGUI::System::getSingleton().setDefaultMouseCursor("TaharezLook", "MouseArrow");

CEGUI::Window* rootWindow = CEGUI::WindowManager::getSingleton().loadWindowLayout("taschenrechner.xml");
CEGUI::System::getSingleton().setGUISheet(rootWindow);

Allen PushButtons wird dieselbe Callback Funktion zugewiesen:

Code:

	CEGUI::WindowManager::getSingleton().getWindow("fwRechner/eingabefeld")->setText("0");

	CEGUI::WindowManager::WindowIterator wi = CEGUI::WindowManager::getSingleton().getIterator();
	CEGUI::Window* w;
	while(!wi.isAtEnd())
	{
		w = *wi;
		if(w->getType() == "TaharezLook/Button")
		{
			w->subscribeEvent(CEGUI::PushButton::EventClicked, CEGUI::Event::Subscriber(&TRFrameListener::buttonPressed, this));
		}
		wi++;
	}

Die Callbackfunktion. Kann man einen Taschenrechner schlimmer programmieren?

Code:

bool TRFrameListener::buttonPressed(const CEGUI::EventArgs& e)
{
	//Zeiger zum Eingabefeld
	CEGUI::WindowManager* wmgr = CEGUI::WindowManager::getSingletonPtr();
	CEGUI::Window* eingabefeld = wmgr->getWindow("fwRechner/eingabefeld");
	//Den unbrauchbaren EventArgs Typ in einen Zeiger zum gedrückten Button umwandeln.
	const CEGUI::WindowEventArgs* evt = static_cast<const CEGUI::WindowEventArgs*>(&e);
	CEGUI::PushButton* but = static_cast<CEGUI::PushButton*>(evt->window);
	//Ein paar zuweisungen für Variablen/Werte, die häufig genutzt werden. Kurze, nichtssagende namen ftw.
	std::string bn = but->getName().c_str();
	std::string bt = but->getText().c_str();
	std::string et = eingabefeld->getText().c_str();

	if(bt == "0" || bt == "1" || bt == "2" || bt == "3" || bt == "4" || bt == "5" || bt == "6" || bt == "7" || bt == "8" || bt == "9")
	{
		if(Ogre::StringConverter::parseReal(et) == 0)
			eingabefeld->setText("");
		eingabefeld->setText(std::string(et.c_str()) + bt);
	}
	else if(bt == "C")
	{
		eingabefeld->setText("0");
		wert = 0;
		operant = "";
	}
	else if(bt == ".")
	{
		eingabefeld->setText(std::string(et.c_str()) + bt);
	}
	else
	{
		if(operant != "")
		{
			if(operant == "+")
				wert += Ogre::StringConverter::parseReal(et);
			if(operant == "-")
				wert -= Ogre::StringConverter::parseReal(et);
			if(operant == "x")
				wert *= Ogre::StringConverter::parseReal(et);
			if(operant == "/")
				wert /= Ogre::StringConverter::parseReal(et);

			eingabefeld->setText(Ogre::StringConverter::toString(static_cast<Ogre::Real>(wert)));
		}
		else
		{
			wert = Ogre::StringConverter::parseReal(et);
		}

		if(bt == "=")
		{
			operant == "";
		}
		else
		{
			if(bt == "+/-")
				wert *= -1;
			else if(bt == "+")
				operant = "+";
			else if(bt == "-")
				operant = "-";
			else if(bt == "x")
				operant = "x";
			else if(bt == "/")
				operant = "/";

			eingabefeld->setText("0");
		}

		

	}
	return true;
}

Thema: [Bildung] Kampf der Toolkits

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