kniip/.cursor/plans/vergrootglas_bij_selectie_eaef4448.plan.md

name, overview, todos, isProject

name	overview	todos	isProject
Vergrootglas bij selectie	Add a magnifier (circular zoom with crosshair and X/Y coordinates near the cursor) to the snip overlay and the screencast region selector, with a settings checkbox that is on by default. Release as 1.1.5.	id content status setting ShowMagnifier (default true) toevoegen aan AppSettings completed id content status control MagnifierControl maken: ronde zoom, raster, kruisdraad, X/Y-badge, plaatsing bij cursor met randcorrectie completed id content status snip Vergrootglas in RegionCaptureWindow + doorgeven vanuit App.BeginSnip completed id content status screencast Vergrootglas in RegionSelectorWindow met vooraf vastgelegd beeld vanuit RecordingController.BeginSelection completed id content status settings-ui Checkbox in SettingsWindow (tab Sneltoetsen) laden en opslaan completed id content status release CHANGELOG 1.1.5, README, versienummers, build.ps1 draaien, commit/tag 1.1.5 en pushen completed	false

Vergrootglas bij het kiezen van een gebied (1.1.5)

Starting point

• kniip has no magnifier yet. The snip overlay src/Kniip/Capture/RegionCaptureWindow.xaml shows a frozen screenshot (Frozen), a dim layer, the selection and a W × H badge.
• The screencast selector src/Kniip/Recording/RegionSelectorWindow.xaml is a transparent overlay over the live screen. It has no image to zoom into.

Approach

flowchart LR
    Settings["AppSettings.ShowMagnifier"] --> App["App.BeginSnip"]
    Settings --> Rec["RecordingController.BeginSelection"]
    App -->|"frozen image + flag"| Snip[RegionCaptureWindow]
    Rec -->|"capture per screen + flag"| Sel[RegionSelectorWindow]
    Snip --> Mag[MagnifierControl]
    Sel --> Mag

1. Setting: in src/Kniip/Settings/AppSettings.cs add public bool ShowMagnifier { get; set; } = true; with a Dutch doc comment.
2. Shared control: new src/Kniip/Capture/MagnifierControl.xaml(.cs) (UserControl, IsHitTestVisible="False"), styled like the screenshot:
   • A round clipped area (about 130 DIP) showing an Image of the frozen bitmap with NearestNeighbor scaling. A CroppedBitmap of about 15x15 physical pixels around the cursor is enlarged around 8x.
   • A pixel grid, a blue crosshair through the center pixel and a small square on the center pixel. The crosshair uses AccentBrush, the ring is white with a shadow.
   • Below the circle, a badge in the same style as SizeBadge with X: … Y: … in physical screen coordinates.
   • Method Update(BitmapSource frozen, System.Drawing.Point physicalRelative, System.Drawing.Point screenPoint). Pixels outside the image are left black.
   • Placement: bottom-right of the cursor at about 20 DIP offset. It flips left and/or up near the screen edge.
3. Snip overlay src/Kniip/Capture/RegionCaptureWindow.xaml.cs:
   • Add a constructor parameter bool showMagnifier and add <local:MagnifierControl x:Name="Magnifier" Visibility="Collapsed"/> to the Grid.
   • In OnMouseMove, update and show the magnifier while it is on (before and during dragging). Not in window-pick mode (PicksWindow), because exact pixels don't matter there. Hide it on MouseLeave.
   • src/Kniip/App.xaml.cs BeginSnip passes Settings.ShowMagnifier.
4. Screencast selector src/Kniip/Recording/RegionSelectorWindow.xaml.cs:
   • Add an optional BitmapSource? frozen constructor parameter. When it is set, the same magnifier runs in OnMouseMove (also while hovering over windows, because you can drag from there).
   • src/Kniip/Recording/RecordingController.cs BeginSelection: if _settings.ShowMagnifier is on, call ScreenGrabber.Capture(screen.Bounds) per screen before the selectors are shown, so the overlay is not in the image. Otherwise pass null.
5. Settings screen src/Kniip/Settings/SettingsWindow.xaml tab Sneltoetsen: below the hotkeys, add a card title "Gebied kiezen" with <CheckBox x:Name="MagnifierBox" Content="Vergrootglas tonen bij het kiezen van een gebied (knipsel en screencast)" />. In SettingsWindow.xaml.cs, add a line to LoadFrom (around line 100) and to the save step (around line 444).
6. Release 1.1.5:
   • CHANGELOG.md gets a new section ## 1.1.5 - 2026-11-09 with a Nieuw entry for the magnifier (round zoom with crosshair and X/Y, for both snips and screencasts) and how to turn it off.
   • README.md: the version table and build comment go to 1.1.5.
   • Version 1.1.4 becomes 1.1.5 in build.ps1, installer/Kniip.iss and src/Kniip/Kniip.csproj.
   • Run .\build.ps1, then commit "1.1.5", tag 1.1.5 and push, the same way as 1.1.4. You create the release on git.hibbit.net yourself; I'll supply the changelog text.