NEWS.md

In ganttify: Create Interactive Gantt Charts with Work Breakdown Structure

ganttify 0.2.5

New Feature

• Custom tooltip field labels: tooltip_config now supports named character vectors to set friendly display labels for custom tooltip fields. Use c(column_name = "Display Label") instead of c("column_name") to control what label appears in the hover tooltip. Unnamed elements continue to use the column name as the label (fully backward-compatible).

ganttify 0.2.4

Bug Fix

• Milestone line hover now works along the full line height: Previously, hover tooltips on single-date milestone vertical lines only triggered near the top or bottom endpoints. The hover mechanism is now a separate invisible marker trace distributed along the full height of the line, making the hover responsive anywhere along the line. Applied to both single-date vertical lines and narrow date-range milestones that fall back to vertical lines.

• Reduced hover sensitivity for milestone lines: Lowered the hover detection distance from 20px to 10px, making the hover trigger only when the cursor is very close to the milestone line (within ~2.5 days at typical chart zoom), preventing accidental tooltip triggers when hovering nearby activities.

ganttify 0.2.3

Performance

• Optimized date parsing: Dates now default to MM/DD/YYYY format with single-pass parsing. Dramatically faster on large datasets. Users can specify alternative format via date_format parameter.

Improvements

• Flexible Date Formats: Activity and milestone dates accept MM/DD/YYYY (default, e.g. "09/15/2024"), Date class objects, or custom formats via optional date_format parameter (e.g. "%Y-%m-%d" for ISO).
• parse_date_flex() helper with configurable date_format parameter (default: "%m/%d/%Y").
• Guard in generate_hover_points() handles reversed dates gracefully (End < Start) without crashing.
• format_label() renders date placeholders in MM/DD/YYYY.
• Sample dataset (test_project) uses MM/DD/YYYY date strings.

ganttify 0.2.2

Bug Fix

• Milestone Lines Extend Full Height: Milestone vertical lines now span the entire chart height instead of stopping at the visible viewport boundary when scrolling through rows. Lines drawn with y = c(0.5, total_rows + 0.5) for consistent visibility across the full chart.

New Features

• Hide Milestone Labels by Level: Added display_config$milestone$hide_label_levels parameter to suppress text annotations for milestones at specific label_level values while keeping hover tooltips intact. For example, set to c(1) to hide all level-1 milestone labels. Default NULL shows all labels (fully backwards-compatible).

ganttify 0.2.1

New Features

• Milestone Label Levels: Added label_level parameter to milestone markers for vertical stacking of labels. Set to 1 or 2 to control which labels appear above others when milestones are close together.

milestones <- data.frame(
  label = c("Kickoff", "Budget Approval"),
  color = c("blue", "green"),
  label_level = c(1, 2)  # Level 1 appears above level 2
)
milestones$date <- list("01/05/2025", "01/10/2025")

• Milestone Custom Tooltips: Added support for custom tooltip fields in milestones via tooltip_config$milestone. Add any columns to your milestone data frame and display them in hover tooltips.

milestones <- data.frame(
  label = c("Kickoff", "Review Period"),
  color = c("blue", "purple"),
  Description = c("Project kickoff meeting", "Technical review"),
  Owner = c("PM", "Tech Lead")
)
milestones$date <- list("01/05/2025", c("02/10/2025", "02/20/2025"))

Ganttify(
  ...,
  milestone_lines = milestones,
  tooltip_config = list(
    milestone = c("Description", "Owner")
  )
)

Improvements

• Fixed hover functionality for milestone areas (shaded date ranges) - now triggers at the label position (top/middle/bottom edge) for consistency with line milestones.

ganttify 0.2.0

New Features

• Milestone Areas: Milestone markers now support date ranges in addition to single dates. Use a list column for the date field to specify either a single date (vertical line) or two dates (shaded area).

milestones <- data.frame(
  label = c("Deadline", "Review Period"),
  color = c("red", "blue"),
  fill_opacity = c(1, 0.15)
)
milestones$date <- list(
  "12/01/2024",                    # Single date = line
  c("10/01/2024", "10/31/2024")    # Two dates = shaded area
)

• Y-Axis Label Visibility: Added show_yaxis_labels to layout_config to hide y-axis labels. When set to FALSE, activity labels are hidden. If display_config$wbs$show_labels is TRUE, WBS labels will still be shown.

layout_config = list(show_yaxis_labels = FALSE)

Improvements

• Narrow milestone date ranges are automatically converted to vertical lines (uses same 0.3% threshold as activity bars).
• Fixed milestone area opacity by using Plotly's separate opacity parameter instead of rgba.

ganttify 0.1.8

New Features

• Custom Tooltip Fields: Added tooltip_config parameter to display custom columns from your data in hover tooltips. Specify which columns from wbs_structure and activities to show. Fields that don't exist or have empty/NA values are automatically hidden.

tooltip_config = list(
  wbs = c("Owner", "Budget"),
  activity = c("Status", "Agency", "Priority")
)

ganttify 0.1.7

New Features

• Dynamic Minimum Bar Width: Activities and WBS items with very short durations now remain visible at any zoom level. The chart dynamically adjusts bar widths when zooming to ensure all items are visible, while preserving original dates in hover tooltips.

Improvements

• Switched from hovertext to hovertemplate for more consistent hover behavior across all bar types.
• Removed deprecated short_activity_indicator parameter (replaced by automatic dynamic bar width).

Bug Fixes

• Fixed hover tooltips showing incorrect format on dynamically resized bars.

ganttify 0.1.6

Bug Fixes

• Fixed column name change bug.

Improvements

• Added hover_popup_max_chars parameter to control text wrapping in hover popups.

ganttify 0.1.5

New Features

• Added yaxis_label_width parameter to control y-axis label area width.
• Added yaxis_label_max_chars parameter for automatic label truncation.

ganttify 0.1.4

New Features

• Added milestone lines support with customizable labels, colors, and positions.
• Added "today" line capability using Sys.Date() in milestone_lines.

ganttify 0.1.3

New Features

• Added planned vs actual dates visualization with stacked bars.
• Added diagonal stripe pattern for actual date bars.

ganttify 0.1.2

New Features

• Added color_config parameter with three modes: "wbs", "uniform", and "attribute".
• Added bar_config parameter for bar styling (opacity, height, dim_past_activities).
• Added display_config parameter to control visibility of WBS/activities.
• Added label_config parameter for custom label templates.

ganttify 0.1.1

Improvements

• Added dynamic date formatting based on zoom level.
• Added alternating background colors for time periods.

ganttify 0.1.0

Initial Release

• Create interactive Gantt charts with WBS hierarchy.
• WBS-based color inheritance for activities.
• Scrollable views for large projects.
• Pan and zoom support.
• Hover tooltips with activity details.

ganttify documentation built on March 3, 2026, 5:08 p.m.