Zsolt Tasnadi
db8a97b365
NAWS mid-session updates now propagate to the window stack: Application re-runs each open window's relayout on resize. Window#relayout re-centers (clamped to the screen edge) by shifting all descendants; MasterDetail recomputes its full geometry and re-renders the detail at the new width. ButtonBar placement is extracted into ButtonBar.place for reuse. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
107 lines
3.8 KiB
Ruby
107 lines
3.8 KiB
Ruby
# frozen_string_literal: true
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require_relative '../widgets'
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module BBS
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module Windows
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# Lays out a row of buttons at the bottom of a window.
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#
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# Button descriptor:
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# { key:, label:, on_click:, primary:, cancel:, align:, keep_open: }
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#
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# `on_click` receives the BBS::Window as its only argument and may return
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# :keep to keep the window open. Any other return value (or nil) causes
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# the window to be closed after the handler.
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#
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# `primary: true` gets initial focus on the button.
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# `cancel: true` is informational only — ESC closes the window through the
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# standard Window#close_key path. If you also want a cancel-specific side
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# effect on ESC, set `window.on_close = ...` manually.
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# `align: :left | :right | :center` — default is :center for a single
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# button, :right otherwise. Left-aligned buttons stack from the left edge;
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# right-aligned buttons stack flush against the right edge in declaration
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# order (so the last right-aligned button sits closest to the edge).
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module ButtonBar
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module_function
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# Returns { widgets:, primary:, by_key: }.
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def attach(window, app, descriptors)
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return { widgets: [], primary: nil, by_key: {} } if descriptors.nil? || descriptors.empty?
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widgets = descriptors.map do |d|
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BBS::Widgets::Button.new(label: d[:label], on_click: build_handler(window, app, d))
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end
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place(window, widgets, descriptors)
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widgets.each { |w| window.add(w) }
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primary_idx = descriptors.index { |d| d[:primary] }
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primary = primary_idx ? widgets[primary_idx] : nil
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by_key = {}
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descriptors.each_with_index { |d, i| by_key[d[:key]] = widgets[i] if d[:key] }
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{ widgets: widgets, primary: primary, by_key: by_key }
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end
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# Position (or re-position) already-built bar widgets against the
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# window's current bounds. Used by attach and by window relayouts.
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def place(window, widgets, descriptors)
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return if widgets.empty?
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default_align = descriptors.length == 1 ? :center : :right
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aligns = descriptors.map { |d| d[:align] || default_align }
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row_y = window.bounds.y + window.bounds.height - 2
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left_x0 = window.bounds.x + 2
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right_x1 = window.bounds.x + window.bounds.width - 2
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win_x0 = window.bounds.x
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win_w = window.bounds.width
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x = left_x0
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widgets.each_with_index do |w, i|
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next unless aligns[i] == :left
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bw = button_width(w)
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w.layout(x, row_y, bw, 1)
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x += bw + 1
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end
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right_indices = aligns.each_index.select { |i| aligns[i] == :right }
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total_right = right_indices.sum { |i| button_width(widgets[i]) + 1 } - 1
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total_right = [total_right, 0].max
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x = right_x1 - total_right + 1
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right_indices.each do |i|
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bw = button_width(widgets[i])
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widgets[i].layout(x, row_y, bw, 1)
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x += bw + 1
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end
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center_indices = aligns.each_index.select { |i| aligns[i] == :center }
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total_center = center_indices.sum { |i| button_width(widgets[i]) + 1 } - 1
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total_center = [total_center, 0].max
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x = win_x0 + (win_w - total_center) / 2
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center_indices.each do |i|
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bw = button_width(widgets[i])
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widgets[i].layout(x, row_y, bw, 1)
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x += bw + 1
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end
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end
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def button_width(button)
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"[ #{button.display_label} ]".length
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end
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def build_handler(window, app, descriptor)
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on_click = descriptor[:on_click]
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keep_open = descriptor[:keep_open]
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lambda do |_btn|
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result = on_click&.call(window)
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app.close_window(window) unless keep_open || result == :keep
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:handled
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end
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end
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end
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end
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end
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