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Phase 6, step 6. The window opened at 480x900 under a comment that said why: *"The layouts have only ever been exercised at phone widths. This is a starting size that does not immediately misrepresent them, not a considered desktop layout."* That was honest, and it has stopped being true. 1100dp is inside the expanded breakpoint (840-1199), which is the narrowest window M3 recommends two panes in and so the smallest opening size at which a desktop user sees a desktop layout rather than a phone one stretched sideways. The content does not stretch to fill it: screens are held to a readable measure and centred, so the extra width becomes margin. Also a minimum size, which the window never had. Compose Desktop's `WindowState` carries no minimum, so the window could be dragged narrower than anything in the app was written for; 400x600 is the narrowest of the five widths this phase is meant to be checked at, and the compact breakpoint's own floor is a phone rather than nothing. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This is a Kotlin Multiplatform project targeting Android, iOS, Desktop (JVM).
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/composeApp is for code that will be shared across your Compose Multiplatform applications. It contains several subfolders:
- commonMain is for code that’s common for all targets.
- Other folders are for Kotlin code that will be compiled for only the platform indicated in the folder name. For example, if you want to use Apple’s CoreCrypto for the iOS part of your Kotlin app, the iosMain folder would be the right place for such calls. Similarly, if you want to edit the Desktop (JVM) specific part, the jvmMain folder is the appropriate location.
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/iosApp contains iOS applications. Even if you’re sharing your UI with Compose Multiplatform, you need this entry point for your iOS app. This is also where you should add SwiftUI code for your project.
Build and Run Android Application
To build and run the development version of the Android app, use the run configuration from the run widget in your IDE’s toolbar or build it directly from the terminal:
- on macOS/Linux
./gradlew :composeApp:assembleDebug - on Windows
.\gradlew.bat :composeApp:assembleDebug
Build and Run Desktop (JVM) Application
To build and run the development version of the desktop app, use the run configuration from the run widget in your IDE’s toolbar or run it directly from the terminal:
- on macOS/Linux
./gradlew :composeApp:run - on Windows
.\gradlew.bat :composeApp:run
Build and Run iOS Application
To build and run the development version of the iOS app, use the run configuration from the run widget in your IDE’s toolbar or open the /iosApp directory in Xcode and run it from there.
Learn more about Kotlin Multiplatform…