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# imgui-java
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# imgui-java
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[](https://travis-ci.org/SpaiR/imgui-java) [](https://javadoc.io/doc/io.imgui.java/binding) [](https://bintray.com/spair/io.imgui.java/binding/_latestVersion) [](https://bintray.com/spair/io.imgui.java/lwjgl3/_latestVersion)
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[](https://travis-ci.org/SpaiR/imgui-java)
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[](https://bintray.com/spair/io.imgui.java/binding/_latestVersion)
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[](https://bintray.com/spair/io.imgui.java/lwjgl3/_latestVersion)
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[](https://javadoc.io/doc/io.imgui.java/binding)
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JNI based binding for [Dear ImGui](https://github.com/ocornut/imgui) with no dependencies, ready to use pre-compiled binaries and a renderer for [LWJGL3](https://www.lwjgl.org/).
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A handcrafted Java binding for [Dear ImGui](https://github.com/ocornut/imgui) with no dependencies and ready to use pre-compiled binaries.
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Please read **Binding Notice** to get more info about java-specific things of the API.<br>
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See official [documentation](https://github.com/ocornut/imgui#usage) and [wiki](https://github.com/ocornut/imgui/wiki) to get more info about how to do things in Dear ImGui.
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It's a straightforward binding, which uses JNI to do a direct calls to Dear ImGui API.<br>
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Please read **Binding notice** to get more info about specific of the binding API.<br>
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See official [documentation](https://github.com/ocornut/imgui#usage) and [wiki](https://github.com/ocornut/imgui/wiki) to get more info about how to do things in ImGui.
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imgui-java provides all the data you need to render Dear ImGui. If, for some reason, you want to use your own backend renderer, see how things are done in [ImGuiImplGl3](https://github.com/SpaiR/imgui-java/blob/v1.76-0.8/imgui-lwjgl3/src/main/java/imgui/gl3/ImGuiImplGl3.java).
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Binding doesn't force you to use backend renderer which is introduced here. Feel free to use your own render engine if you need so.
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See how things are done in [ImGuiImplGl3](https://github.com/SpaiR/imgui-java/blob/v1.76-0.8/imgui-lwjgl3/src/main/java/imgui/gl3/ImGuiImplGl3.java).
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Binding has the next version naming: `imguiVersion-bindingVersion`.<br>
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For example `1.74-0.1` means that binding uses `1.74` version of **ImGui** and binding itself has version `0.1`.
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Binding has the next versioning semantic: `imguiVersion-bindingVersion`.<br>
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For example `1.74-0.1` means that imgui-java uses `1.74` version of Dear ImGui and binding itself has the version `0.1`.
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*Some of the very specific features are still in a wip state.*
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## How to try
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## How to Try
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_Make sure you have installed Java 8 or higher._
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You can try this binding by yourself in a three simple steps:
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You can try Dear ImGui with Java by yourself in a three simple steps:
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```
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git clone --branch v1.76-0.8 https://github.com/SpaiR/imgui-java.git
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@@ -30,106 +24,63 @@ cd imgui-java
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gradlew :imgui-lwjgl3:startExample
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```
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That's it! This will start an example app [ImGuiGlfwExample](https://github.com/SpaiR/imgui-java/blob/v1.76-0.8/imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java)
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which relies on GLFW and LWJGL3. Feel free to modify [ImGuiGlfwExample#showUi](https://github.com/SpaiR/imgui-java/blob/v1.76-0.8/imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java#L346)
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method to try different ImGui widgets in action.
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That's all! You will start an example app [ImGuiGlfwExample](https://github.com/SpaiR/imgui-java/blob/v1.76-0.8/imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java). Feel free to modify [ExampleUi](https://github.com/SpaiR/imgui-java/blob/v1.76-0.8/imgui-lwjgl3/src/test/java/ExampleUi.java) class to try different Dear ImGui widgets in action.
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**GIF with example:** https://imgur.com/a/E2rfuCR
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## How to use
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## How to Use
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<details>
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<summary><b>Usage ready build.gradle</b></summary>
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repositories {
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jcenter()
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mavenCentral()
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}
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switch (OperatingSystem.current()) {
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case OperatingSystem.LINUX:
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project.ext.nativesType = "natives-linux"
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break
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case OperatingSystem.WINDOWS:
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project.ext.nativesType = "natives-windows"
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break
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}
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ext {
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lwjglVersion = '3.2.3'
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imguiVersion = '1.76-0.8'
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}
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dependencies {
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implementation "io.imgui.java:binding:$imguiVersion"
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implementation "io.imgui.java:lwjgl3:$imguiVersion"
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runtimeOnly "io.imgui.java:$nativesType:$imguiVersion"
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implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
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['', '-opengl', '-glfw'].each {
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implementation "org.lwjgl:lwjgl$it:$lwjglVersion"
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runtimeOnly "org.lwjgl:lwjgl$it::$nativesType"
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}
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}
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</details>
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### Step 1
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Add jcenter repository:
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```
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repositories {
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jcenter()
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mavenCentral()
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}
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ext {
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lwjglVersion = '3.2.3'
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imguiVersion = '1.76-0.8'
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}
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dependencies {
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implementation "io.imgui.java:binding:$imguiVersion"
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implementation "io.imgui.java:lwjgl3:$imguiVersion"
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// Include all available natives, but it's likely that you want something specific
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runtimeOnly "io.imgui.java:natives-windows:$imguiVersion"
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runtimeOnly "io.imgui.java:natives-windows-x86:$imguiVersion"
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runtimeOnly "io.imgui.java:natives-linux:$imguiVersion"
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runtimeOnly "io.imgui.java:natives-linux-x86:$imguiVersion"
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implementation platform("org.lwjgl:lwjgl-bom:$lwjglVersion")
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['', '-opengl', '-glfw'].each {
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implementation "org.lwjgl:lwjgl$it:$lwjglVersion"
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// Include all available natives, but it's likely that you want something specific
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runtimeOnly "org.lwjgl:lwjgl$it::natives-windows"
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runtimeOnly "org.lwjgl:lwjgl$it::natives-windows-x86"
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runtimeOnly "org.lwjgl:lwjgl$it::natives-linux"
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}
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}
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```
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### Step 2
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Add binding dependency:
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```
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implementation 'io.imgui.java:binding:1.76-0.8'
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```
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### Step 3
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If you want to use LWJGL3 renderer:
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```
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implementation 'io.imgui.java:lwjgl3:1.76-0.8'
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```
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**Disclaimer!**<br>
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LWJGL3 renderer is based on the `3.2.3` version of the [LWJGL](https://www.lwjgl.org/).
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You'll need to add additional dependencies to it. Specifically `lwjgl` itself, `glfw` and `opengl` modules.
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You can find how to do that [here](https://www.lwjgl.org/customize).
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### Step 4
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Add binary lib dependency:
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```
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runtimeOnly "io.imgui.java:$imguiNatives:1.76-0.8"
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```
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Where `imguiNatives` could be:
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- `natives-linux`
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- `natives-linux-x86`
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- `natives-windows`
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- `natives-windows-x86`
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_(`x86` suffix is to get 32bit library)_
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Or alternatively you can download binaries manually:<br>
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Go to the `/bin` folder and pick a native library for your OS. Then you'll need to provide `imgui.library.path` or `java.library.path`
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VM option with path to a folder where you've placed downloaded file.
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Alternatively you can download imgui-java binaries manually from the [release page](https://github.com/SpaiR/imgui-java/releases/latest). You'll need to provide a VM option: `imgui.library.path` or `java.library.path`. It should point to the folder where you've placed downloaded binaries.
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**You are ready to use imgui-java binding!**
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#### Binding notice:
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* All ImGui methods are available in `camelCase`, not in `PascalCase`.
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* In places where you need to **pass** `ImVec2` or `ImVec4` you'll need to pass two or four float parameters respectively.
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If you need to **get** `ImVec2` or `ImVec4`, you'll need to pass a destination object as method parameter.
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* When you need to get an input/output to/from Dear ImGui - use primitive wrappers: `ImBool`, `ImInt` etc.
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* Due to the Java and JNI restrictions we can't provide a fully fledged callbacks to the ImGui::InputText*() methods.
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Partly you could replace some of the features (like setting of the allowed chars to input) by using the ImGuiInputTextData class.
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Read [javadoc](https://javadoc.io/doc/io.imgui.java/binding) to get more info.
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### Binding Notice:
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* All Dear ImGui methods are available in `camelCase`, not in `PascalCase`.
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* To **pass** `ImVec2`/`ImVec4` - provide two/four float numbers.
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To **get** `ImVec2`/`ImVec4` - provide a destination object.
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* To get an input/output to/from Dear ImGui - use primitive wrappers: `ImBool`, `ImInt` etc.
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* Due to the Java and JNI restrictions we can't provide a fully fledged callbacks to the ImGui::InputText* methods.
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To replace some of the features use an ImGuiInputTextData class.
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* Read [javadoc](https://javadoc.io/doc/io.imgui.java/binding) and sources comments to get more info.
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## How to build
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## How to Build
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To build native libraries you should install `mingw-w64` and `ant`. Modify [GenerateLibs](https://github.com/SpaiR/imgui-java/blob/master/buildSrc/src/main/groovy/imgui/generate/GenerateLibs.groovy)
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to build specific binaries you need. After everything is configured, run `gradlew :imgui-binding:generateLibs`.
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This will build native libraries and place them in `~/imgui-binding/build/libsNative` folder.
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That will build native libraries and place them in `imgui-binding/build/libsNative` folder.
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## Credits
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This binding is partly based on the work of [xpenatan](https://github.com/xpenatan) and his version [jDear-imgui](https://github.com/xpenatan/jDear-imgui).
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