update wiki

Box-Selection.md

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+# Plan: Box Selection
+
+## Overview
+Add drag-to-select functionality for selecting multiple shapes within a rectangle.
+
+## Current State
+- Click selects single shape (in Controller.mousePressed)
+- Shift+click adds to selection
+- Selection uses SelectionAttributes
+
+## Implementation Plan
+
+### 1. Controller changes
+- Add state: `boxSelectOrigin` (Point), `boxSelectActive` (boolean)
+- Add `boxSelectionRectangle` (Rectangle) for current drag area
+
+### 2. Mouse handling
+- `mousePressed`: 
+  - If click on empty area (no shape), start box selection
+  - Store origin point
+  - Clear current selection unless Shift is held
+- `mouseDragged`:
+  - If boxSelectActive, update rectangle from origin to current point
+  - Repaint to show selection box
+- `mouseReleased`:
+  - Calculate final box rectangle
+  - Find all shapes whose bounds intersect with box
+  - Add to selection (or replace if no Shift)
+  - Clear box selection state, repaint
+
+### 3. Visual feedback
+- Draw semi-transparent rectangle during drag in ShapesView
+- Use XOR mode or overlay for drawing
+- Box outline: dashed line, gray color
+
+### 4. Selection behavior
+- Default: box replaces current selection
+- Shift+drag: box adds to current selection
+- Box entirely within shape = shape selected
+- Partial overlap: select shape (standard behavior)
+
+### 5. Intersection check
+- Use `shape.getBounds().intersects(boxRect)` 
+- Handle composite shapes (SCollection) - check children
+
+## Files to modify
+- `ui/Controller.java` - mouse handling
+- `ui/ShapesView.java` - draw box overlay in paintComponent
+
+## Edge cases
+- Drag on existing selection: allow move instead of box select
+- Very small drag (< 5px): treat as click, select shape under point
+- Empty box: clear selection

Home.md

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-Bienvenue sur le Wiki.
+# Home
+
+## Project Plans
+
+1. [Resize Shapes](Resize-Shapes.md) - Add ability to resize shapes by dragging corner handles
+2. [Text Shapes](Text-Shapes.md) - Add support for creating text shapes
+3. [Undo/Redo Stack](Undo-Redo-Stack.md) - Implement undo/redo functionality
+4. [Box Selection](Box-Selection.md) - Add drag-to-select for multiple shapes

Resize-Shapes.md

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+# Plan: Resize Shapes
+
+## Overview
+Add the ability to resize shapes by dragging corner handles on selected shapes.
+
+## Current State
+- Selection already draws red corner handles via `ShapeDraftman.drawHandlerIfSelected()`
+- `Controller` handles mouse events for selection and moving
+- Selection uses `SelectionAttributes` on shapes
+
+## Implementation Plan
+
+### 1. ResizeHandle enum
+- Create `ResizeHandle` enum in `shapes/` package with positions: NW, N, NE, E, SE, S, SW, W
+- Each handle knows its cursor type
+
+### 2. Controller changes
+- Add mouse state: `resizing` (boolean), `activeHandle` (ResizeHandle), `resizeOrigin` (Point)
+- Add `getHandleAt(Point)` method to find which handle is clicked
+- Modify mouse handlers:
+  - `mousePressed`: If click is on a handle, enter resize mode
+  - `mouseDragged`: If resizing, calculate delta and call shape's resize method
+  - `mouseReleased`: Exit resize mode
+- Add cursor changes based on handle position
+
+### 3. Shape interface changes
+- Add `resize(ResizeHandle handle, int dx, int dy)` method to `Shape` interface
+- Implement in `AbstractShape` or each concrete shape
+- For basic shapes (rectangle, circle, triangle):
+  - Rectangle: adjust width/height based on handle
+  - Circle: adjust radius (maintain aspect ratio or allow ellipse)
+  - Triangle: adjust vertices
+
+### 4. Visual feedback
+- Update `ShapeDraftman` to use different handle positions (not just corners)
+- Consider showing resize preview during drag
+
+## Files to modify
+- `shapes/Shape.java` - add resize method
+- `ui/Controller.java` - mouse handling for resize
+- `shapes/SRectangle.java`, `SCircle.java`, `STriangle.java` - implement resize logic
+
+## Alternative consideration
+- Could use a separate `Resizer` class to keep Controller clean
+- Could implement resize in `AbstractShape` for common logic

Text-Shapes.md

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+# Plan: Text Shapes
+
+## Overview
+Add support for creating text shapes in the canvas.
+
+## Current State
+- Available shapes: SRectangle, SCircle, STriangle
+- Uses visitor pattern for rendering
+- Menu system in App.java for adding shapes
+
+## Implementation Plan
+
+### 1. Create SText class
+- New class `shapes/SText` extending `AbstractShape`
+- Fields: `text` (String), `fontSize` (int, default 16), `fontName` (String, default "SansSerif"), `fontStyle` (int, default Font.PLAIN)
+- Empty or cancelled input falls back to placeholder `"Text"`
+- Override `resize(ResizeHandle, int, int)` as no-op (text not resizable)
+- Implement `accept(ShapeVisitor)` calling `visitor.visitText(this)`
+- Bounds are stored as a Rectangle at construction time (position only, zero size); updated and cached by ShapeDraftman on each paint via FontMetrics for accurate hit-test and selection
+
+### 2. ShapeVisitor interface change
+- Add `visitText(SText text)` to the `ShapeVisitor` interface
+- All implementations must implement this method
+
+### 3. ShapeDraftman changes
+- Implement `visitText(SText)`: render with `Graphics2D.drawString()`
+- After drawing, measure text via `g2d.getFontMetrics()` and update the cached bounds on the SText object
+- Selection visuals reuse existing `drawHandlerIfSelected()` with measured bounds
+
+### 4. SVGDraftman / HTMLDraftman changes
+- Implement `visitText(SText)` in both visitors
+- Escape special characters in text content for safe export (& < > " ')
+
+### 5. Controller changes
+- Add lightweight text-placement mode (boolean `addingText`)
+- When active, next canvas click prompts via `JOptionPane.showInputDialog()`
+- If input is null (cancelled): do not create shape, exit text-placement mode
+- If input is empty: use placeholder `"Text"`
+- Create `SText` at click position, add to model, exit text-placement mode
+
+### 6. App.java changes
+- Add "Add Text" menu item that calls `controller.enterTextMode()`
+- Single-line, no wrapping; bounds expand horizontally with text length
+
+## Files to create/modify
+- Create: `shapes/SText.java`
+- Modify: `ShapeVisitor.java` — add `visitText(SText)`
+- Modify: `ui/ShapeDraftman.java` — implement visitText, update bounds via FontMetrics
+- Modify: `ui/visitors/SVGDraftman.java` — implement visitText
+- Modify: `ui/visitors/HTMLDraftman.java` — implement visitText
+- Modify: `ui/Controller.java` — add text-placement mode
+- Modify: `App.java` — add "Add Text" menu item
+
+## Defaults
+- Font: SansSerif, plain, size 16
+- Placeholder: "Text"
+- Text is single-line, no wrapping
+
+## Out of scope (first version)
+- Double-click to edit existing text
+- Font size/style configuration via UI
+- Text resize (no-op for now)

Undo-Redo-Stack.md

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+# Plan: Undo/Redo Stack
+
+## Overview
+Implement undo/redo functionality with a command history stack.
+
+## Current State
+- Controller handles shape operations (add, delete, move, color change)
+- No command history exists
+- Selection system tracks selected shapes
+
+## Implementation Plan
+
+### 1. Command pattern
+- Create `Command` interface with `execute()` and `undo()` methods
+- Create concrete commands:
+  - `AddShapeCommand` - stores shape reference, removes on undo
+  - `DeleteShapesCommand` - stores shapes list, re-adds on undo
+  - `MoveShapeCommand` - stores shape, original pos, new pos
+  - `ChangeColorCommand` - stores shape, old/new colors
+  - `ResizeCommand` - stores shape, old/new bounds
+  - `GroupCommand` - composite for batch operations
+
+### 2. CommandManager class
+- Maintains two stacks: `undoStack`, `redoStack`
+- `execute(Command)`: push to undoStack, clear redoStack
+- `undo()`: pop from undoStack, call undo(), push to redoStack
+- `redo()`: pop from redoStack, call execute(), push to undoStack
+- Limit stack size (e.g., 50 commands)
+
+### 3. Controller integration
+- Replace direct shape operations with commands
+- Example: instead of `collection.add(shape)`, do `commandManager.execute(new AddShapeCommand(shape, collection))`
+
+### 4. Keyboard shortcuts
+- Ctrl+Z: undo
+- Ctrl+Y: redo (or Ctrl+Shift+Z)
+- Update menu with these shortcuts
+
+### 5. Menu additions
+- Add Edit menu items: Undo, Redo
+- Enable/disable based on stack state
+
+## Files to create/modify
+- Create: `commands/Command.java`, `commands/CommandManager.java`
+- Create: `commands/AddShapeCommand.java`, `commands/DeleteShapesCommand.java`, `commands/MoveShapeCommand.java`, etc.
+- Modify: `ui/Controller.java`, `App.java` (menu)
+
+## Edge cases
+- Copy/paste after undo: clear redo stack
+- Multi-select delete: single compound command
+- Application close: no persistence needed (in-memory only)