Dynamic Fonts

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Written for CEGUI 0.5

Works with versions 0.5.x (obsolete)

Written for CEGUI 0.6

Works with versions 0.6.x (obsolete)

Introduction

The datafiles\fonts folder contains static font definitions such as Commonwealth-10.font. The XML contents of that file specify one particular font, mainly a logical name (Commonwealth-10), a filename (Commonv2c.ttf), and a size (10). To load this static font definition you'd write the following line of code: 

CEGUI::FontManager::getSingleton().createFont("Commonwealth-10.font");

This works well, but sometimes you need to display a same font in various sizes. One approach is to create multiple .font files, one per font size. But there is a better approach, a way to dynamically create fonts.

Please post comments or questions on the message board thread for the DynamicFont

Files

DynamicFont.h

#ifndef _DynamicFont_h_
#define _DynamicFont_h_
 
#include "CEGuiSample.h"
#include "CEGUI.h"
#include "CEGUIXMLAttributes.h"
 
class DemoSample : public CEGuiSample
{
public:
    bool initialiseSample()
	{
		using namespace CEGUI;
		try
		{
			// Retrieve the window manager
			WindowManager& winMgr = WindowManager::getSingleton();
 
			// Load the TaharezLook scheme and set up the default mouse cursor and font
			SchemeManager::getSingleton().loadScheme("TaharezLook.scheme");
			System::getSingleton().setDefaultMouseCursor("TaharezLook", "MouseArrow");
			if(!FontManager::getSingleton().isFontPresent("Commonwealth-10"))
				FontManager::getSingleton().createFont("Commonwealth-10.font");
 
			// Set the GUI Sheet
			Window* sheet = winMgr.createWindow("DefaultWindow", "root_wnd");
			System::getSingleton().setGUISheet(sheet);
 
			// Load a layout
			Window* guiLayout = winMgr.loadWindowLayout("DynamicFont.layout");
			sheet->addChildWindow(guiLayout);
 
			// Configure the event for the list of created fonts
			CEGUI::Combobox* existingFonts = static_cast<CEGUI::Combobox*>(winMgr.getWindow("DynamicFont/Fonts"));
			existingFonts->subscribeEvent(CEGUI::Combobox::EventListSelectionAccepted,	CEGUI::Event::Subscriber(&DemoSample::eventSelectExistingFont, this)); 
 
			// Configure the event for the add button
			CEGUI::PushButton* add = static_cast<CEGUI::PushButton*>(winMgr.getWindow("DynamicFont/Add"));
			add->subscribeEvent(CEGUI::PushButton::EventMouseClick,	CEGUI::Event::Subscriber(&DemoSample::eventAddFont, this)); 
 
			// Add the font previously created
			addExistingFont("Commonwealth-10");
		}
		catch(Exception &e)
		{
			#if defined( __WIN32__ ) || defined( _WIN32 )
				MessageBox(NULL, e.getMessage().c_str(), "Error initializing the demo", MB_OK | MB_ICONERROR | MB_TASKMODAL);
			#else
				std::cerr << "Error initializing the demo:" << e.getMessage().c_str() << "\n";
			#endif
		}
 
		return true;
	}
 
	void cleanupSample(void)
	{
	}
 
	bool eventAddFont(const CEGUI::EventArgs& args)
	{
		// Add a font from the specified parameters
		using namespace CEGUI;
 
		WindowManager& winMgr = WindowManager::getSingleton();
		Window* nameText = winMgr.getWindow("DynamicFont/Name");
		Window* filenameText = winMgr.getWindow("DynamicFont/Filename");
		Window* sizeText = winMgr.getWindow("DynamicFont/Size");
 
		setFont(nameText->getText(), filenameText->getText(), sizeText->getText());
		return true;
	}
 
	void addExistingFont(const CEGUI::String& pName)
	{
		// Once a font has been created we add it to the combobox of fonts
		using namespace CEGUI;
		WindowManager& winMgr = WindowManager::getSingleton();
 
		Combobox* existingFonts = static_cast<CEGUI::Combobox*>(winMgr.getWindow("DynamicFont/Fonts"));
		ListboxTextItem* itemCombobox = new ListboxTextItem(pName);
		itemCombobox->setSelectionBrushImage("TaharezLook", "MultiListSelectionBrush");
		itemCombobox->setSelected(true);
		existingFonts->addItem(itemCombobox);
	}
 
	bool eventSelectExistingFont(const CEGUI::EventArgs& args)
	{
		// Use an already created font
		using namespace CEGUI;
		WindowManager& winMgr = WindowManager::getSingleton();
		Combobox* existingFonts = static_cast<CEGUI::Combobox*>(winMgr.getWindow("DynamicFont/Fonts"));
		setFont(existingFonts->getText(), "", "");
		return true;
	}
 
	void setFont(const CEGUI::String& pName, const CEGUI::String& pFilename, const CEGUI::String& pSize)
	{
		// Set the font displayed within the multiline editbox
		using namespace CEGUI;
 
		String sampleText(pName);
 
		WindowManager& winMgr = WindowManager::getSingleton();
		CEGUI::Window* text = winMgr.getWindow("DynamicFont/Text");
		Font* font;
 
		if(FontManager::getSingleton().isFontPresent(pName))
		{
			// Select a previously created font
			font = FontManager::getSingleton().getFont(pName);
		}
		else
		{
			// Dynamically create a new font
			XMLAttributes xmlAttributes;
 
			// Attributes specified within CEGUIFont.cpp
			xmlAttributes.add("Name", pName);
			xmlAttributes.add("Filename", pFilename);
			xmlAttributes.add("ResourceGroup", "");
			xmlAttributes.add("AutoScaled", "true");
			xmlAttributes.add("NativeHorzRes", "800");
			xmlAttributes.add("NativeVertRes", "600");
 
			// Attributes specified within CEGUIXMLAttributes.cpp
			xmlAttributes.add("Size", pSize);
			xmlAttributes.add("AntiAlias", "true");
 
			try
			{
				font = FontManager::getSingleton().createFont("FreeType", xmlAttributes);
				if(font)
				{
					font->load(); // This function must be used
					addExistingFont(pName);
				}
			}
			catch(Exception &e)
			{
				// Display the error message
				sampleText = e.getMessage();
			}
		}
 
		text->setFont(font);
		text->setText(sampleText);
	}
 
private:
};
 
#endif // _DynamicFont_h_

main.cpp

#if defined( __WIN32__ ) || defined( _WIN32 )
	#define WIN32_LEAN_AND_MEAN
	#define NOMINMAX
	#include "windows.h"
#endif
 
#include "DynamicFont.h"
 
#if defined( __WIN32__ ) || defined( _WIN32 )
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine,int nCmdShow)
#else
int main(int argc, char *argv[])
#endif
{
    DemoSample app;
    return app.run();
}

DynamicFont.layout

<?xml version="1.0" encoding="UTF-8"?>
 
<GUILayout >
    <Window Type="TaharezLook/FrameWindow" Name="DynamicFont" >
        <Property Name="Text" Value="Dynamic Font" />
        <Property Name="TitlebarFont" Value="Commonwealth-10" />
        <Property Name="InheritsAlpha" Value="False" />
        <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
        <Property Name="TitlebarEnabled" Value="True" />
        <Property Name="UnifiedAreaRect" Value="{{0.02,0},{0.054167,0},{0.98,0},{0.781251,0}}" />
        <Window Type="TaharezLook/MultiLineEditbox" Name="DynamicFont/Text" >
            <Property Name="Text" >
            </Property>
            <Property Name="ReadOnly" Value="True" />
            <Property Name="MaxTextLength" Value="1073741823" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.01,0},{0.075,0},{0.99,0},{0.715617,0}}" />
        </Window>
        <Window Type="TaharezLook/StaticText" Name="DynamicFont/NameLabel" >
            <Property Name="Text" Value="Name:" />
            <Property Name="HorzFormatting" Value="RightAligned" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.018409,0},{0.881661,0},{0.0809004,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/Editbox" Name="DynamicFont/Name" >
            <Property Name="MaxTextLength" Value="1073741823" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.0809,0},{0.881661,0},{0.328819,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/StaticText" Name="DynamicFont/FilenameLabel" >
            <Property Name="Font" Value="Commonwealth-10" />
            <Property Name="Text" Value="Filename:" />
            <Property Name="HorzFormatting" Value="RightAligned" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.347544,0},{0.881661,0},{0.438807,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/Editbox" Name="DynamicFont/Filename" >
            <Property Name="Font" Value="Commonwealth-10" />
            <Property Name="MaxTextLength" Value="1073741823" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.438807,0},{0.881661,0},{0.713682,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/StaticText" Name="DynamicFont/SizeLabel" >
            <Property Name="Font" Value="Commonwealth-10" />
            <Property Name="Text" Value="Size:" />
            <Property Name="HorzFormatting" Value="RightAligned" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.731982,0},{0.881661,0},{0.793499,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/Editbox" Name="DynamicFont/Size" >
            <Property Name="Font" Value="Commonwealth-10" />
            <Property Name="MaxTextLength" Value="1073741823" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.793499,0},{0.881661,0},{0.858294,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/Button" Name="DynamicFont/Add" >
            <Property Name="Text" Value="Add" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.867109,0},{0.881661,0},{0.974324,0},{0.968338,0}}" />
        </Window>
        <Window Type="TaharezLook/StaticText" Name="DynamicFont/FontsLabel" >
            <Property Name="Font" Value="Commonwealth-10" />
            <Property Name="Text" Value="Fonts:" />
            <Property Name="HorzFormatting" Value="RightAligned" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.018409,0},{0.768338,0},{0.0859395,0},{0.855015,0}}" />
        </Window>
        <Window Type="TaharezLook/Combobox" Name="DynamicFont/Fonts" >
            <Property Name="ReadOnly" Value="True" />
            <Property Name="UnifiedMaxSize" Value="{{1,0},{1,0}}" />
            <Property Name="UnifiedAreaRect" Value="{{0.085939,0},{0.768338,0},{0.974324,0},{0.994412,0}}" />
            <Property Name="MaxEditTextLength" Value="1073741823" />
        </Window>
    </Window>
</GUILayout>
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