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QG4/docs/en/qgc-dev-guide/user_interface_design/index.md

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User Guide and DevGuide source migration to Stable v4_3 (#10882) * User guide migration to QGC source * Add google analytics - but need [GA4] Find your Google tag ID * Update (most) notes to use vitepress note syntax * Convert remaining notes, tips, warnings * Prettier all the files * Lower case and compress all images * Lower case filenames * docs_deploy1 * Disable platform builds on commit to docs (only) * Test deployment script 1 (#10893) * docs_deploy1 * Disable platform builds on commit to docs (only) * docs_deploy2 * lower case waypoint file * Lower case console.jpg * Add duplicate index as fallback * Get path from process * fix upload * Disable running workflows for changes in the actions * Attempt update via github workflow * Attempt workflow update * A bit more deployment debugging * MOdify yaml to use personal access token * Lower case the support.md * Fix up pattern * Add UI design - ignored by github * Fix up plugins name * Fix up toolbar * Fix up the Support path * Fix up support link to go to the NEW target * Only build this on commit * Add docs stablev4 3 (#10894) * docs_deploy1 * Disable platform builds on commit to docs (only) * docs_deploy2 * lower case waypoint file * Lower case console.jpg * Add duplicate index as fallback * Get path from process * fix upload * Disable running workflows for changes in the actions * Attempt update via github workflow * Attempt workflow update * A bit more deployment debugging * MOdify yaml to use personal access token * Lower case the support.md * Fix up pattern * Add UI design - ignored by github * Fix up plugins name * Fix up toolbar * Fix up the Support path * Fix up support link to go to the NEW target * Only build this on commit * Remove unused files
1 year ago
# User Interface Design
The main pattern for UI design in QGC is a UI page written in QML, many times communicating with a custom "Controller" written in C++. This follows a somewhat hacked variant of the MVC design pattern.
The QML code binds to information associated with the system through the following mechanisms:
- The custom controller
- The global `QGroundControl` object which provides access to things like the active Vehicle
- The FactSystem which provides access to parameters and in some cases custom Facts.
Note: Due to the complexity of the QML used in QGC as well as it's reliance on communication with C++ objects to drive the ui it is not possible to use the QML Designer provided by Qt to edit QML.