---
id: T02
parent: S03
milestone: M002
provides: []
requires: []
affects: []
key_files: ["app/src/types/canvas.ts", "app/src/components/canvas/KonvaStage.tsx", "app/src/components/canvas/CanvasToolbar.tsx", "app/src/components/canvas/ObjectPanel.tsx", "app/src/components/canvas/ShapeProperties.tsx", "app/src/components/canvas/AlignmentBar.tsx"]
key_decisions: ["Text objects default to fill '#000000' and stroke 'transparent' (opposite of shape defaults) for natural text appearance", "Text transform scales width only (for wrapping), keeping fontSize unchanged — consistent with design tool UX"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Ran `cd app && npx tsc --noEmit` — zero errors under strict mode. Ran `cd app && npx vitest run --reporter=verbose` — all 95 tests pass across 7 test files in 2.45s."
completed_at: 2026-03-26T05:55:43.833Z
blocker_discovered: false
---

# T02: Added TextObject to CanvasObject union and wired text tool into KonvaStage rendering, CanvasToolbar, ObjectPanel, ShapeProperties, and AlignmentBar with exhaustive switch coverage

> Added TextObject to CanvasObject union and wired text tool into KonvaStage rendering, CanvasToolbar, ObjectPanel, ShapeProperties, and AlignmentBar with exhaustive switch coverage

## What Happened
---
id: T02
parent: S03
milestone: M002
key_files:
  - app/src/types/canvas.ts
  - app/src/components/canvas/KonvaStage.tsx
  - app/src/components/canvas/CanvasToolbar.tsx
  - app/src/components/canvas/ObjectPanel.tsx
  - app/src/components/canvas/ShapeProperties.tsx
  - app/src/components/canvas/AlignmentBar.tsx
key_decisions:
  - Text objects default to fill '#000000' and stroke 'transparent' (opposite of shape defaults) for natural text appearance
  - Text transform scales width only (for wrapping), keeping fontSize unchanged — consistent with design tool UX
duration: ""
verification_result: passed
completed_at: 2026-03-26T05:55:43.846Z
blocker_discovered: false
---

# T02: Added TextObject to CanvasObject union and wired text tool into KonvaStage rendering, CanvasToolbar, ObjectPanel, ShapeProperties, and AlignmentBar with exhaustive switch coverage

**Added TextObject to CanvasObject union and wired text tool into KonvaStage rendering, CanvasToolbar, ObjectPanel, ShapeProperties, and AlignmentBar with exhaustive switch coverage**

## What Happened

Added a TextObject interface to canvas.ts extending BaseCanvasObject with text-specific fields (text, fontFamily, fontSize, letterSpacing, lineHeight, fill, stroke, strokeWidth, width for wrapping). Added it to the CanvasObject discriminated union. Then wired the text type through all six canvas component files: KonvaStage (rendering, tool creation, sizing, transform), CanvasToolbar (TOOLS array), ObjectPanel (TYPE_ICONS), ShapeProperties (getWidth/getHeight + hasFill), and AlignmentBar (toBoundingRect). All switch statements are exhaustive for the updated union. TypeScript compiles cleanly and all 95 tests pass.

## Verification

Ran `cd app && npx tsc --noEmit` — zero errors under strict mode. Ran `cd app && npx vitest run --reporter=verbose` — all 95 tests pass across 7 test files in 2.45s.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd app && npx tsc --noEmit` | 0 | ✅ pass | 2000ms |
| 2 | `cd app && npx vitest run --reporter=verbose` | 0 | ✅ pass | 2450ms |


## Deviations

Added case 'text' to AlignmentBar.tsx toBoundingRect — not listed in task plan but required for exhaustive switch coverage.

## Known Issues

None.

## Files Created/Modified

- `app/src/types/canvas.ts`
- `app/src/components/canvas/KonvaStage.tsx`
- `app/src/components/canvas/CanvasToolbar.tsx`
- `app/src/components/canvas/ObjectPanel.tsx`
- `app/src/components/canvas/ShapeProperties.tsx`
- `app/src/components/canvas/AlignmentBar.tsx`


## Deviations
Added case 'text' to AlignmentBar.tsx toBoundingRect — not listed in task plan but required for exhaustive switch coverage.

## Known Issues
None.
