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Simplifed the example

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This commit is contained in:
Andreas Huggel 2004-02-16 09:04:51 +00:00
parent b97eb57cd8
commit 3c952a6993
1 changed files with 7 additions and 10 deletions
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src/example1.cpp
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@ -3,7 +3,7 @@
Abstract: Example showing how to add, modify and delete Exif metadata
File: example1.cpp
Version: $Name: $ $Revision: 1.3 $
Version: $Name: $ $Revision: 1.4 $
Author(s): Andreas Huggel (ahu) <ahuggel@gmx.net>
History: 26-Jan-04, ahu: created
*/
@ -42,22 +42,19 @@ try {
delete v;
// Now create a more interesting value
v = Exif::Value::create(Exif::unsignedRational);
Exif::URationalValue* rv = new Exif::URationalValue;
// Set two rational components from a string
v->read("1/2 1/3");
// Downcast the Value to its actual type
Exif::URationalValue* rv = dynamic_cast<Exif::URationalValue*>(v);
if (rv == 0) throw Exif::Error("Downcast failed");
// Add more elements through the extended interface of the actual type
rv->read("1/2 1/3");
// Add more elements through the extended interface of rational value
rv->value_.push_back(std::make_pair(2,3));
rv->value_.push_back(std::make_pair(3,4));
// Add the key and value pair to the Exif data
key = "Image.ImageCharacteristics.PrimaryChromaticities";
exifData.add(key, rv);
std::cout << "Added key \"" << key << "\", value \"" << *v << "\"\n";
// Delete the memory allocated by Value::create
delete v;
std::cout << "Added key \"" << key << "\", value \"" << *rv << "\"\n";
// Delete memory allocated on the heap
delete rv;
// *************************************************************************
// Modify Exif data