baa50a5c89
2003-02-16 Chris Toshok <toshok@ximian.com> * gal/widgets/e-reflow.c (reflow_columns): enable this function to reflow the view from a particular column onward. This is useful if you have a huge model and the only changes are happening at the end (as is normally the case if you're appending to a large model.) (item_changed): calculate the height of the changed item here, so we aren't doing it as we reflow the model. For now, reflow the entire model. Further optimization can be done here. (item_removed): new function. remove the item and reflow from the column that contained it. (items_inserted): calculate the heights of the new items, and calculate the lowest numbered column containing one of the inserted items. reflow from there. (model_changed): calculate the heights of everything here. (comparison_changed): new function, clear the sorter and reflow. (disconnect_model): disconnect comparison_changed and model_item_removed. (connect_model): connect comparison_changed and model_item_removed. (adjustment_changed): use queue_incarnate here, instead of forcing the reflow model to incarnate as we scroll. Not sure if this is actually the right solution, but it does make the scrollbar more responsive at the cost of redraw speed. * gal/widgets/e-reflow.h (struct _EReflow): add slots for the new signal ids, as well as "reflow_from_column". * gal/widgets/e-reflow-model.c (e_reflow_model_class_init): create the comparison_changed and model_item_removed signals. (e_reflow_model_comparison_changed): new function, emit the comparison_changed signal. (e_reflow_model_item_removed): new function, emit the model_item_removed signal. * gal/widgets/e-reflow-model.h: add comparison_changed and model_item_removed signals. svn path=/trunk/; revision=19917
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
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/*
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* e-reflow.h
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* Copyright 2000, 2001, Ximian, Inc.
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*
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* Authors:
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* Chris Lahey <clahey@ximian.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License, version 2, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef __E_REFLOW_H__
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#define __E_REFLOW_H__
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#include <libgnomecanvas/gnome-canvas.h>
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#include <gal/widgets/e-reflow-model.h>
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#include <gal/widgets/e-selection-model.h>
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#include <gal/util/e-sorter-array.h>
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#ifdef __cplusplus
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extern "C" {
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#pragma }
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#endif /* __cplusplus */
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/* EReflow - A canvas item container.
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*
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* The following arguments are available:
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*
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* name type read/write description
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* --------------------------------------------------------------------------------
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* minimum_width double RW minimum width of the reflow. width >= minimum_width
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* width double R width of the reflow
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* height double RW height of the reflow
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*/
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#define E_REFLOW_TYPE (e_reflow_get_type ())
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#define E_REFLOW(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), E_REFLOW_TYPE, EReflow))
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#define E_REFLOW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), E_REFLOW_TYPE, EReflowClass))
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#define E_IS_REFLOW(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), E_REFLOW_TYPE))
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#define E_IS_REFLOW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((obj), E_REFLOW_TYPE))
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typedef struct EReflowPriv EReflowPriv;
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typedef struct _EReflow EReflow;
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typedef struct _EReflowClass EReflowClass;
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struct _EReflow
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{
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GnomeCanvasGroup parent;
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/* item specific fields */
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EReflowModel *model;
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guint model_changed_id;
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guint comparison_changed_id;
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guint model_items_inserted_id;
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guint model_item_removed_id;
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guint model_item_changed_id;
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ESelectionModel *selection;
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guint selection_changed_id;
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guint selection_row_changed_id;
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guint cursor_changed_id;
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ESorterArray *sorter;
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GtkAdjustment *adjustment;
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guint adjustment_changed_id;
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guint adjustment_value_changed_id;
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guint set_scroll_adjustments_id;
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int *heights;
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GnomeCanvasItem **items;
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int count;
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int allocated_count;
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int *columns;
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gint column_count; /* Number of columnns */
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GnomeCanvasItem *empty_text;
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gchar *empty_message;
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double minimum_width;
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double width;
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double height;
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double column_width;
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int incarnate_idle_id;
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/* These are all for when the column is being dragged. */
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gdouble start_x;
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gint which_column_dragged;
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double temp_column_width;
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double previous_temp_column_width;
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int cursor_row;
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int reflow_from_column;
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guint column_drag : 1;
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guint need_height_update : 1;
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guint need_column_resize : 1;
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guint need_reflow_columns : 1;
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guint default_cursor_shown : 1;
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guint maybe_did_something : 1;
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guint maybe_in_drag : 1;
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GdkCursor *arrow_cursor;
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GdkCursor *default_cursor;
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};
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struct _EReflowClass
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{
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GnomeCanvasGroupClass parent_class;
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int (*selection_event) (EReflow *reflow, GnomeCanvasItem *item, GdkEvent *event);
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void (*column_width_changed) (EReflow *reflow, double width);
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};
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/*
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* To be added to a reflow, an item must have the argument "width" as
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* a Read/Write argument and "height" as a Read Only argument. It
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* should also do an ECanvas parent reflow request if its size
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* changes.
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*/
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GtkType e_reflow_get_type (void);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __E_REFLOW_H__ */
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