\chapter{Ecore Evas Callbacks}
\hypertarget{ecore_evas_callbacks_example_c}{}\label{ecore_evas_callbacks_example_c}\index{Ecore Evas Callbacks@{Ecore Evas Callbacks}}


Our example is remarkably simple, all it does is create an Ecore\+\_\+\+Evas and register a callback for a bunch of events. What\textquotesingle{}s interesting here is knowing when each of these callbacks will be called, however since that depends on the underlying windowing system there are no guarantees that all of the callbacks will be called for your windowing system. To know which callbacks will be called for your windowing system run the example and redirect the output to a file, and take a look at it.

\begin{DoxyNote}{Note}
Make sure you minimize, resize, give and remove focus to see more callbacks called.
\end{DoxyNote}
The example is constituted of two main parts, first is the implementation of callbacks that will be called for each event(all our callbacks do is print their own name) and the second is the main function where we register the event callbacks and run the main loop\+: 
\begin{DoxyCodeInclude}{0}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{preprocessor}{\#include\ <Ecore.h>}}
\DoxyCodeLine{\textcolor{preprocessor}{\#include\ <\mbox{\hyperlink{Ecore__Evas_8h}{Ecore\_Evas.h}}>}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_destroy(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}destroy\(\backslash\)n"{}});}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Main__Loop__Group_ga95cf8e97dff0716433c2c5474d606a98}{ecore\_main\_loop\_quit}}();}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_delete(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}delete\(\backslash\)n"{}});}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Main__Loop__Group_ga95cf8e97dff0716433c2c5474d606a98}{ecore\_main\_loop\_quit}}();}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_focus\_in(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}focus\_in\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_focus\_out(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}focus\_out\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_hide(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}hide\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_mouse\_in(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}mouse\_in\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_show(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}show\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_mouse\_out(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}mouse\_out\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_move(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}move\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_post\_render(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}post\_render\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_pre\_free(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}pre\_free\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_pre\_render(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}pre\_render\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{static}\ \textcolor{keywordtype}{void}}
\DoxyCodeLine{\_resize(Ecore\_Evas\ *ee\ \mbox{\hyperlink{group__Eina__Types__Group_ga82d751be730f849719ca292f9558be87}{EINA\_UNUSED}})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ printf(\textcolor{stringliteral}{"{}resize\(\backslash\)n"{}});}
\DoxyCodeLine{\}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keywordtype}{int}}
\DoxyCodeLine{main(\textcolor{keywordtype}{void})}
\DoxyCodeLine{\{}
\DoxyCodeLine{\ \ \ Ecore\_Evas\ *ee;}
\DoxyCodeLine{\ \ \ Evas\_Object\ *bg;}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga32ddbb6457033ad435a177eb0c4fe235}{ecore\_evas\_init}}();}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ ee\ =\ \mbox{\hyperlink{group__Ecore__Evas__Group_gaaa770b6f2f1395f9eeb0e50e26c3f933}{ecore\_evas\_new}}(NULL,\ 0,\ 0,\ 200,\ 100,\ NULL);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga3b2832e0373bbafae2bb7143618535c1}{ecore\_evas\_title\_set}}(ee,\ \textcolor{stringliteral}{"{}Ecore\ Evas\ Callbacks\ Example"{}});}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga4953047ff97d4f1b0d75a7d513d4f317}{ecore\_evas\_show}}(ee);}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ bg\ =\ \mbox{\hyperlink{group__Evas__Object__Rectangle_ga1b7a9d8e6ce240590c1734da5f3449d2}{evas\_object\_rectangle\_add}}(\mbox{\hyperlink{group__Ecore__Evas__Group_ga6f8d214cd55bc940d7cc62fecd8dbc06}{ecore\_evas\_get}}(ee));}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Evas__Object__Group__Basic_gab751e9d24c16e74af6f7c08ea5b930c2}{evas\_object\_color\_set}}(bg,\ 255,\ 128,\ 0,\ 255);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Evas__Object__Group_gacad94595f83580c18908cb3b69b08d1a}{evas\_object\_resize}}(bg,\ 9999,\ 9999);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Evas__Object__Group__Basic_ga07208fcafd4739de606bc35fff684bf5}{evas\_object\_show}}(bg);}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ \textcolor{comment}{//callbacks}}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga3d478e975e2101b9b821ef24baf3dd9e}{ecore\_evas\_callback\_delete\_request\_set}}(ee,\ \_delete);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga3680b5c89157167318192157a5d24ec4}{ecore\_evas\_callback\_destroy\_set}}(ee,\ \_destroy);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gaed00daa1c88d15a6eca0fe80d6dbe9d7}{ecore\_evas\_callback\_focus\_in\_set}}(ee,\ \_focus\_in);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gaefc78deb952d5a344244a85ee163991a}{ecore\_evas\_callback\_focus\_out\_set}}(ee,\ \_focus\_out);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gac61786e38551703d12605e0ed69f3bc4}{ecore\_evas\_callback\_hide\_set}}(ee,\ \_hide);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gaef1d4db9bda946e4cd18cc2b22de0a4b}{ecore\_evas\_callback\_mouse\_in\_set}}(ee,\ \_mouse\_in);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gaf7930c3ea1d3d6adf1ee9e870df36129}{ecore\_evas\_callback\_mouse\_out\_set}}(ee,\ \_mouse\_out);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga4a89157b5f10a1429d5e5a586cec036c}{ecore\_evas\_callback\_move\_set}}(ee,\ \_move);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga8f1dfb93c0af2ff6145860c250872294}{ecore\_evas\_callback\_post\_render\_set}}(ee,\ \_post\_render);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga6d95e41a3b84e262c0e80f1904bd8473}{ecore\_evas\_callback\_pre\_free\_set}}(ee,\ \_pre\_free);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gac1ec97ef5561355c1d998c8bb201345d}{ecore\_evas\_callback\_pre\_render\_set}}(ee,\ \_pre\_render);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gaac67f679c9027059a34519fbdea360df}{ecore\_evas\_callback\_resize\_set}}(ee,\ \_resize);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_ga798e4c5f7eb2c3a9867f81499ad81b16}{ecore\_evas\_callback\_show\_set}}(ee,\ \_show);}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Main__Loop__Group_gaf103b9f668bb3e4fed12e52c6180132d}{ecore\_main\_loop\_begin}}();}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gad3ec61f2aa03df4d3dbfd0d311e0c8dc}{ecore\_evas\_free}}(ee);}
\DoxyCodeLine{\ \ \ \mbox{\hyperlink{group__Ecore__Evas__Group_gab8fa311077f749190c9b622f672b2214}{ecore\_evas\_shutdown}}();}
\DoxyCodeLine{}
\DoxyCodeLine{\ \ \ \textcolor{keywordflow}{return}\ 0;}
\DoxyCodeLine{\}}
\DoxyCodeLine{}

\end{DoxyCodeInclude}
 