85 lines
1.7 KiB
Plaintext
85 lines
1.7 KiB
Plaintext
note
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description: "Summary description for {WSF_PAGABLE}."
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author: ""
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date: "$Date$"
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revision: "$Revision$"
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deferred class
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WSF_PAGABLE_DATASOURCE [G -> WSF_ENTITY]
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inherit
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WSF_DATASOURCE [G]
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redefine
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state,
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set_state,
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update
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end
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feature --Event handling
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set_on_update_page_agent (f: PROCEDURE [ANY, TUPLE])
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--Set paging update listener
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do
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on_update_page_agent := f
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end
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update
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--Trigger update listeners
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do
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Precursor
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if attached on_update_page_agent as a then
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a.call (Void)
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end
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end
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feature {WSF_PAGE_CONTROL, WSF_CONTROL} -- State management
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state: JSON_OBJECT
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-- Return state which contains the current page, page_size and row_count
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do
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Result := Precursor
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Result.put (create {JSON_NUMBER}.make_integer (page), "page")
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Result.put (create {JSON_NUMBER}.make_integer (page_size), "page_size")
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Result.put (create {JSON_NUMBER}.make_integer (row_count), "row_count")
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end
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set_state (new_state: JSON_OBJECT)
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-- Restore page, page_size and row_count from json
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do
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Precursor (new_state)
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if attached {JSON_NUMBER} new_state.item ("page") as new_page then
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page := new_page.item.to_integer
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end
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if attached {JSON_NUMBER} new_state.item ("page_size") as new_page_size then
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page_size := new_page_size.item.to_integer
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end
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if attached {JSON_NUMBER} new_state.item ("row_count") as new_row_count then
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row_count := new_row_count.item.to_integer
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end
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end
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feature -- Change
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set_page (p: INTEGER)
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do
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page := p.min (page_count).max (1)
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end
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feature -- Properties
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page: INTEGER
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page_size: INTEGER
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row_count: INTEGER
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page_count: INTEGER
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do
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Result := (row_count / page_size).ceiling
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end
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on_update_page_agent: detachable PROCEDURE [ANY, TUPLE]
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end
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