Review open_file_box (Internal use only)

Implementation

• Updating src/xtd.forms/CMakeLists.txt to add open_file_box.h and open_file_box_options.h.
• Updating src/xtd.forms/include/xtd/forms/open_file_box.h to add comments.
• Updating src/xtd.forms/include/xtd/forms/open_file_box.h to add comment line : /// @include open_file_box.cpp.
• Updating src/xtd.forms/include/xtd/forms/open_file_box.h to fix some code styles.
• Updating src/xtd.forms/include/xtd/forms/open_file_box.h to add .file_name(output) to set the specified user file name.
• Updating src/xtd.forms/include/xtd/forms/open_file_box_options.h to use binary literals instead shift operators.

Example

• Updating examples/xtd.forms.examples/dialogs/CMakeLists.txt to add open_file_box project.
• Updating examples/xtd.forms.examples/README.md to add open_file_box example.
• Updating examples/xtd.forms.examples/open_file_box/src/open_file_box.cpp to fix build warning : capture this in lambda button_open_multiple_files.click
• Updating examples/xtd.forms.examples/open_file_box/src/open_file_box.cpp to use xtd::ustring::join :
  • using

message_box::show(ustring::format("Selected files are:\n{}", ustring::join("\n", file_names)));

• instead

xtd::ustring txt;
for (auto& filename : file_names) txt += filename + '\n';
message_box::show(ustring::format("Selected files are:\n{}", txt));

• Updating examples/xtd.forms.examples/open_file_box/src/open_file_box.cpp to fix some code styles.

Documentaton

• Updating docs/roadmap.md to set status.