Doing: cargo build causes following error on Windows 7 (64bit) and Rust 1.24.

_Compiling ui-sys v0.1.1 error: failed to run custom build command for ui-sys v0.1.1

--- stderr fatal: Not a git repository (or any of the parent directories): .git thread 'main' panicked at '_

The trace leads to: 10: build_script_build::main at .\build.rs:15

If I initialise a git-repo inside the folder, it just keeps the same error-trace but no actual mentioning of a fatal error.

This is an experimental patch that removes the dependency on cmake. It has been fully tested on Windows and Unix, and Darwin.

Additionally, a CI test for Darwin has been added, although the test currently times out on Travis in src/controls/progressbar.rs - controls::progressbar::ProgressBarValue (line 19). This is an upstream issue (see https://github.com/andlabs/libui/issues/495).

Platform support:

• [x] Darwin
• [x] Unix
• [x] Windows MSVC
• [x] Windows GNU

This has not been tested without the build feature enabled, as I am not familiar with how that should work.

This ensures that iui and ui-sys will be accurately tracking libui's development, and allows us to be more agile in terms of implementing new (and experimental) features.

Closes #28

@kennytm review would be appreciated

I looked around but I did not see any option to build a static version of libui and link it directly in our binary. I would prefer this to shipping libui.dll with my exectuable.

Have you looked into this before?

Hi Leo,

as bespoken on reddit. Let's do this.

I've merged my changes onto your libui-rs fork, and readded all the functionality I need at the moment to iui. It works for me on mac OS, but I'm pretty sure there are issues on other platforms. Moreover, I'm still using my own libui-fork ([email protected]:masche842/libui) which diverged from libui upstream quite a bit.

Nonetheless, this is all I need at the moment and with these changes in iui, there is no reason for me to maintain my own version of libui-rs. Instead, I can help you with iui.

After updating to the master branch, I came across an error of LNK1181:

$ cargo run
   Compiling unicode-xid v0.0.4
   Compiling winapi v0.3.4
   Compiling quote v0.3.15
   Compiling cc v1.0.15
   Compiling rustc-demangle v0.1.8
   Compiling cfg-if v0.1.3
   Compiling libc v0.2.41
   Compiling bitflags v1.0.3
   Compiling synom v0.11.3
   Compiling syn v0.11.11
   Compiling cmake v0.1.31
   Compiling ui-sys v0.1.2 (https://github.com/LeoTindall/libui-rs#5a68a471)
   Compiling backtrace v0.3.8
   Compiling synstructure v0.6.1
   Compiling failure_derive v0.1.1
   Compiling failure v0.1.1
   Compiling iui v0.2.0 (https://github.com/LeoTindall/libui-rs#5a68a471)
   Compiling iui-example v0.1.0 (file:///C:/Users/34937/Desktop/learning-rust/iui-example)
error: linking with `C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.12.25827\bin\HostX64\x64\link.exe` failed: exit code: 1181
  |
  = note: "C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC\\14.12.25827\\bin\\HostX64\\x64\\link.exe" "/NOLOGO" "/NXCOMPAT" "/LIBPATH:C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.138pesuvab4dy035.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.16u6js6g0l3k1ic6.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.1ckp3bwk0jmrbky4.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.1im38lueib99jsk0.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.1mvmz58owquyropc.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.1y16o1qfye96o7m0.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.1zeawhkbeobww1zn.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.23tqyymcb18u96mb.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.287fjwldxriihryb.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.2jqywn86b2gsqohu.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.2lyh15q6cjwzy18c.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.2yyg5bd89e3irycb.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3171x0bwu82dptu7.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3ayaeypdcro9d6yk.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3cx7oljifvb206q7.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3p4871ksc97vnnrn.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3rngp6bm2u2q5z0y.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3vv0q9obd6w3595h.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.3woqeoqf0goarhik.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.436dotimmrgzkwfa.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.45nf4z58qqykpcpi.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.45pc7c65foh9i35f.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.48721dc4k5qxei0u.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4954tfkopzmp0j3d.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.49a7n47po4ttqjl7.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4e37gusgw81ck2ot.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4ezmh1vbs95c5ack.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4xq48u46a1pwiqn7.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4yekh4a49ri9ikb0.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4yh8x2b62dcih00t.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.4ypvbwho0bu5tnww.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.63mmpc50mjcb0lb.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.8xzrsc1ux72v29j.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.98g0d9x8aw3akpe.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.9elsx31vb4it187.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.c6lbtaiefvx3wya.rcgu.o" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.uj1kr5j3wr6o9sy.rcgu.o" "/OUT:C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.exe" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\iui_example-7e5f53b6c9b28dbe.crate.allocator.rcgu.o" "/OPT:REF,NOICF" "/DEBUG" "/NATVIS:C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\etc\\intrinsic.natvis" "/NATVIS:C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\etc\\liballoc.natvis" "/NATVIS:C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\etc\\libcore.natvis" "/LIBPATH:C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps" "/LIBPATH:C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\build\\ui-sys-0d6721beb6524842\\out\\build\\out" "/LIBPATH:C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libiui-9d03c669f0fd7bc0.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libui_sys-d2250fba2a597401.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\liblibc-29d80453b21edd84.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libfailure-c342c1ff1ee122ce.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libbacktrace-dc01882281fe6157.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\librustc_demangle-89653463bfc73aaf.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libcfg_if-354d1195934b0143.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libwinapi-b854eb8bfb29492c.rlib" "C:\\Users\\34937\\Desktop\\learning-rust\\iui-example\\target\\debug\\deps\\libbitflags-d08788bbacc8698c.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libstd-81327c94ecbc69b1.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libpanic_unwind-904bdc107e3475d8.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libunwind-97dd6b71b2944814.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\liblibc-7810a3f9a7e6d71a.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\liballoc_system-a6c908865d944125.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\liballoc-1337600a3a219c73.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libstd_unicode-0e6be5c2cb6a5139.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libcore-34c46a8013b46e75.rlib" "C:\\Users\\34937\\.rustup\\toolchains\\stable-x86_64-pc-windows-msvc\\lib\\rustlib\\x86_64-pc-windows-msvc\\lib\\libcompiler_builtins-e8d853735a158029.rlib" "ui.lib" "libui.lib" "dbghelp.lib" "kernel32.lib" "advapi32.lib" "advapi32.lib" "ws2_32.lib" "userenv.lib" "shell32.lib" "msvcrt.lib"
  
# the error indicate ui.lib not found
  = note: Non-UTF-8 output: LINK : fatal error LNK1181: \xce\xde\xb7\xa8\xb4\xf2\xbf\xaa\xca\xe4\xc8\xeb\xce\xc4\xbc\xfe\xa1\xb0ui.lib\xa1\xb1\r\n  

error: aborting due to previous error

error: Could not compile `iui-example`.

To learn more, run the command again with --verbose.

I have had cmake installed, and compiled it with rust 1.26 stable:

$ cmake --version
cmake version 3.11.2

CMake suite maintained and supported by Kitware (kitware.com/cmake).

$ rustc --version
rustc 1.26.0 (a77568041 2018-05-07)

Did I miss some steps to do?

I'm trying to execute the example in the crate.io but got this error, I read #14, #249 and #282 but did not get what shall I do exactly.

I'm at Mac.

The full error is:

Hasans-Air:hello-iui hasan$ cargo build Compiling proc-macro2 v0.4.19
Compiling unicode-xid v0.1.0 Compiling cc v1.0.25 Compiling failure_derive v0.1.2 Compiling libc v0.2.43 Compiling cfg-if v0.1.5 Compiling rustc-demangle v0.1.9 Compiling bitflags v1.0.4 Compiling backtrace v0.3.9 Compiling cmake v0.1.34 Compiling ui-sys v0.1.3 Compiling quote v0.6.8 Compiling syn v0.14.9 error: failed to run custom build command for ui-sys v0.1.3 process didn't exit successfully: /Users/hasan/hello-iui/target/debug/build/ui-sys-0fdbd7b46e2e8b27/build-script-build (exit code: 101) --- stdout git version 2.17.1 running: "cmake" "/Users/hasan/.cargo/registry/src/github.com-1ecc6299db9ec823/ui-sys-0.1.3/libui" "-DCMAKE_INSTALL_PREFIX=/Users/hasan/hello-iui/target/debug/build/ui-sys-95463f95efa66ad5/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_C_COMPILER=/usr/bin/cc" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_BUILD_TYPE=release" -- The C compiler identification is AppleClang 10.0.0.10001044 -- The CXX compiler identification is AppleClang 10.0.0.10001044 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- broken -- Configuring incomplete, errors occurred! See also "/Users/hasan/hello-iui/target/debug/build/ui-sys-95463f95efa66ad5/out/build/CMakeFiles/CMakeOutput.log". See also "/Users/hasan/hello-iui/target/debug/build/ui-sys-95463f95efa66ad5/out/build/CMakeFiles/CMakeError.log".

--- stderr fatal: not a git repository (or any of the parent directories): .git CMake Error at /usr/local/Cellar/cmake/3.11.4/share/cmake/Modules/CMakeTestCXXCompiler.cmake:45 (message): The C++ compiler

"/usr/bin/c++"

is not able to compile a simple test program.

It fails with the following output:

Change Dir: /Users/hasan/hello-iui/target/debug/build/ui-sys-95463f95efa66ad5/out/build/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_31f52/fast"
/Library/Developer/CommandLineTools/usr/bin/make -f CMakeFiles/cmTC_31f52.dir/build.make CMakeFiles/cmTC_31f52.dir/build
Building CXX object CMakeFiles/cmTC_31f52.dir/testCXXCompiler.cxx.o
/usr/bin/c++    -ffunction-sections -fdata-sections -fPIC -m64  -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -mmacosx-version-min=10.8   -o CMakeFiles/cmTC_31f52.dir/testCXXCompiler.cxx.o -c /Users/hasan/hello-iui/target/debug/build/ui-sys-95463f95efa66ad5/out/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
warning: include path for stdlibc++ headers not found; pass '-std=libc++' on the command line to use the libc++ standard library instead [-Wstdlibcxx-not-found]
1 warning generated.
Linking CXX executable cmTC_31f52
/usr/local/Cellar/cmake/3.11.4/bin/cmake -E cmake_link_script CMakeFiles/cmTC_31f52.dir/link.txt --verbose=1
/usr/bin/c++   -ffunction-sections -fdata-sections -fPIC -m64  -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk -mmacosx-version-min=10.8 -Wl,-search_paths_first -Wl,-headerpad_max_install_names   CMakeFiles/cmTC_31f52.dir/testCXXCompiler.cxx.o  -o cmTC_31f52 
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9 [-Wdeprecated]
ld: library not found for -lstdc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [cmTC_31f52] Error 1
make: *** [cmTC_31f52/fast] Error 2

CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:35 (project)

thread 'main' panicked at ' command did not execute successfully, got: exit code: 1

build script failed, must exit now', /Users/hasan/.cargo/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.34/src/lib.rs:776:5 note: Run with RUST_BACKTRACE=1 for a backtrace.

warning: build failed, waiting for other jobs to finish... error: build failed

I'm currently writing a program that will need to render long lists of stuff. Currently, the items extend off the screen. Is it possible to make a scrollable area?

MultilineEntry does not display line breaks if those are supplied with set_value, such as

let mut mle = MultilineEntry::new(&ui);
mle.set_value(&ui, "hello\nworld");

The MultilineEntry will show "helloworld". The text returned from that MultilineEntry will be shown correctly with a line break when displayed with println!("{}", mle.value(&ui));

fixes #24. the example just renders the following:

/cc @Pomettini (you wanted to know about this ~12 days ago. sorry! hopefully this is a good reference)

This program prints garbage to the console on my system:

    let ev = iui::UI::init().unwrap();

    {
        let v = vec![1, 2, 3, 4];
        ev.queue_main(|| {
            for i in &v {
                println!("{}", i);
            }
        });
    }

    ev.main();

This is a use-after-free on the vector v and should not compile. Both UI::queue_main and UI::on_should_quit must require the callback to be 'static.

This is probably the case for all functions that take a callback, not just those 2, but I just started using iui, so I don't which (if any) other functions are affected.

You can test that this code example doesn't compile using compiletest-rs.

This PR does not introduce any functional changes and does not depend on any of my others. It moves some of the controls into their own files for better maintainability. Controls with common traits are left together. In the light of future use of libui-ng, where there will be more functions to some of the controls it seemed like a good thing to do.

Its not strictly necessary however and comes down to personal preference, so feel free to decline this PR.

I noticed that insert_dual_endings() pulls in two dependencies (including a full regex engine) for a task that doesn't really justify their use. As a friend of independent applications and libraries I'd welcome if those two crates can be removed.

Of course the new algorithm passes the unit tests. If you are wondering about the len+ 2 in String::with_capacity(), I though i'd leave room for two inserts before causing an allocation.

Because libui didn't show any activity for years, i propose to use the active libui-ng instead. No API functions were remove (only added) and it still compiles wonderfully. I only had to:

• add the one new file to the build script.
• hide warnings as we can't do much about them.

I successfully built and then ran a test application on Debian 11 and on Windows 10. I encountered no issues that i could attribute to the updated library.

Compiling ui-sys v0.1.3 error: failed to run custom build command for ui-sys v0.1.3

Caused by: process didn't exit successfully: C:\Users\intel\Desktop\Rust_Projects\guessing-game\target\debug\build\ui-sys-1a90a5063783f1a4\build-script-build (exit code: 101) --- stdout git version 2.37.1.windows.1 CMAKE_TOOLCHAIN_FILE_x86_64-pc-windows-msvc = None CMAKE_TOOLCHAIN_FILE_x86_64_pc_windows_msvc = None HOST_CMAKE_TOOLCHAIN_FILE = None CMAKE_TOOLCHAIN_FILE = None CMAKE_GENERATOR_x86_64-pc-windows-msvc = None CMAKE_GENERATOR_x86_64_pc_windows_msvc = None HOST_CMAKE_GENERATOR = None CMAKE_GENERATOR = None CMAKE_PREFIX_PATH_x86_64-pc-windows-msvc = None CMAKE_PREFIX_PATH_x86_64_pc_windows_msvc = None HOST_CMAKE_PREFIX_PATH = None CMAKE_PREFIX_PATH = None CMAKE_x86_64-pc-windows-msvc = None CMAKE_x86_64_pc_windows_msvc = None HOST_CMAKE = None CMAKE = None running: "cmake" "C:\Users\intel\.cargo\registry\src\github.com-1ecc6299db9ec823\ui-sys-0.1.3\libui" "-G" "Visual Studio 16 2019" "-Thost=x64" "-Ax64" "-DCMAKE_INSTALL_PREFIX=C:\Users\intel\Desktop\Rust_Projects\guessing-game\target\debug\build\ui-sys-bb7b023830056e1d\out" "-DCMAKE_C_FLAGS= -nologo -MD -Brepro" "-DCMAKE_C_FLAGS_RELEASE= -nologo -MD -Brepro" "-DCMAKE_CXX_FLAGS= -nologo -MD -Brepro" "-DCMAKE_CXX_FLAGS_RELEASE= -nologo -MD -Brepro" "-DCMAKE_ASM_FLAGS= -nologo -MD -Brepro" "-DCMAKE_ASM_FLAGS_RELEASE= -nologo -MD -Brepro" "-DCMAKE_BUILD_TYPE=release" -- Selecting Windows SDK version 10.0.19041.0 to target Windows 6.3.9600. -- Configuring done -- Generating done -- Build files have been written to: C:/Users/intel/Desktop/Rust_Projects/guessing-game/target/debug/build/ui-sys-bb7b023830056e1d/out/build running: "cmake" "--build" "." "--target" "" "--config" "release" "--parallel" "4"

--- stderr fatal: not a git repository (or any of the parent directories): .git Usage: cmake --build

I'm using this library to implement widgets for a STEM toolkit I'm building. It's perfect, super simple, and has just what I need. Thank you!

Some of my components require both custom painting and interaction, but when I started to use Area and AreaHandler, I ran into some limitations. The AreaHandler object passed into Area::new is boxed, and there's no way to access that object from a reference to an Area, so its state can't be changed after the area is created.

let meter = Box::new(Meter { value: 100.0 });
let area = Area::new(&ui, meter);
// Can't change it anymore!
meter = 50.0;

In my fork, I've modified area.rs to also support reference-counted handlers (Rc<RefCell<dyn AreaHandler>>).

let meter = Rc::new(RefCell:new(Meter { value: 100.0 }));
let area = Area::new(&ui, meter.clone());
// Can change this any time.
meter.borrow_mut().value = 50.0;
area.queue_redraw_all(&ui);

The change still supports boxed handlers, and requires no changes to existing code - the existing canvas example runs perfectly - but I've also created a new example that shows how to build an interactive canvas with a ref-counted handler. The handler also implements a changed event that can be hooked by the application. In effect, someone could use this technique to build simple controls on top of an Area.

Would you be interested in a PR to add this change? I'd be happy to do the work to get it PR-ready.

Thanks again for this project!