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authorChris Toshok <toshok@helixcode.com>2000-06-09 07:16:22 +0800
committerChris Toshok <toshok@src.gnome.org>2000-06-09 07:16:22 +0800
commite581631a9ce0803ba629ac67cd8934a6e23753ae (patch)
tree16fd9ebf869dd9fd82d265ce5a60a4ea7aeba652 /widgets/e-table/e-cell-tree.c
parentf856d999c5cade657d045ea22b1fb64be481829d (diff)
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New files. A tree model using a GNode structure to store it's info.
2000-06-08 Chris Toshok <toshok@helixcode.com> * e-tree-gnode.c, e-tree-gnode.h: New files. A tree model using a GNode structure to store it's info. * e-tree-model.c, e-tree-model.h: New files. A proxy model sitting between a table model and the real tree model (of which ETreeGNode is an example). * e-cell-tree.c, e-cell-tree.h: New files. A cell renderer capable of wrapping up a subcell and drawing the tree controls for expanding/collapsing trees. * tree-expanded.xpm, tree-unexpanded.xpm: New files. the standard + and - icons. * e-tree-example-1.c: New file, giving a (pretty poor :) example of using ETreeGNode. * Makefile.am: at the tree stuff to the build, and build tree-example-1. * .cvsignore: ignore tree-example-1. svn path=/trunk/; revision=3483
Diffstat (limited to 'widgets/e-table/e-cell-tree.c')
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diff --git a/widgets/e-table/e-cell-tree.c b/widgets/e-table/e-cell-tree.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* e-cell-tree.c - Tree cell renderer
+ * Copyright (C) 2000 Helix Code, Inc.
+ *
+ * Author: Chris Toshok <toshok@helixcode.com>
+ *
+ * A majority of code taken from:
+ *
+ * the ECellText renderer.
+ *
+ * Copyright (C) 1998 The Free Software Foundation
+ *
+ */
+
+#include <config.h>
+#include <gtk/gtkenums.h>
+#include <gtk/gtkentry.h>
+#include <gtk/gtkwindow.h>
+#include <gtk/gtkinvisible.h>
+#include <gtk/gtksignal.h>
+#include <gdk/gdkkeysyms.h>
+#include <libgnomeui/gnome-canvas.h>
+#include <stdio.h>
+#include "e-table-sorted-variable.h"
+#include "e-tree-model.h"
+#include "e-cell-tree.h"
+#include "e-util/e-util.h"
+#include "e-table-item.h"
+
+#include <gdk/gdkx.h> /* for BlackPixel */
+#include <ctype.h>
+#include <math.h>
+
+#include "tree-expanded.xpm"
+#include "tree-unexpanded.xpm"
+
+#define PARENT_TYPE e_cell_get_type ()
+
+typedef struct {
+ ECellView cell_view;
+ ECellView *subcell_view;
+ GdkGC *gc;
+
+ GnomeCanvas *canvas;
+
+} ECellTreeView;
+
+static ECellClass *parent_class;
+
+static GdkPixbuf *tree_expanded_pixbuf, *tree_unexpanded_pixbuf;
+
+static ETreePath*
+e_cell_tree_get_node (ETreeModel *tree_model, int row)
+{
+ return (ETreePath*)e_table_model_value_at (E_TABLE_MODEL(tree_model), -1, row);
+}
+
+static ETreeModel*
+e_cell_tree_get_tree_model (ETableModel *table_model, int row)
+{
+ return (ETreeModel*)e_table_model_value_at (table_model, -2, row);
+}
+
+/*
+ * ECell::new_view method
+ */
+static ECellView *
+ect_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
+{
+ ECellTree *ect = E_CELL_TREE (ecell);
+ ECellTreeView *tree_view = g_new0 (ECellTreeView, 1);
+ GnomeCanvas *canvas = GNOME_CANVAS_ITEM (e_table_item_view)->canvas;
+
+ tree_view->cell_view.ecell = ecell;
+ tree_view->cell_view.e_table_model = table_model;
+ tree_view->cell_view.e_table_item_view = e_table_item_view;
+
+ /* create our subcell view */
+ tree_view->subcell_view = e_cell_new_view (ect->subcell, table_model, e_table_item_view /* XXX */);
+
+ tree_view->canvas = canvas;
+
+ return (ECellView *)tree_view;
+}
+
+/*
+ * ECell::kill_view method
+ */
+static void
+ect_kill_view (ECellView *ecv)
+{
+ ECellTreeView *tree_view = (ECellTreeView *) ecv;
+
+ /* kill our subcell view */
+ e_cell_kill_view (tree_view->subcell_view);
+
+ g_free (tree_view);
+}
+
+/*
+ * ECell::realize method
+ */
+static void
+ect_realize (ECellView *ecell_view)
+{
+ ECellTreeView *tree_view = (ECellTreeView *) ecell_view;
+
+ /* realize our subcell view */
+ e_cell_realize (tree_view->subcell_view);
+
+ tree_view->gc = gdk_gc_new (GTK_WIDGET (tree_view->canvas)->window);
+
+ gdk_gc_set_line_attributes (tree_view->gc, 1,
+ GDK_LINE_ON_OFF_DASH, None, None);
+ gdk_gc_set_dashes (tree_view->gc, 0, "\1\1", 2);
+
+ if (parent_class->realize)
+ (* parent_class->realize) (ecell_view);
+}
+
+/*
+ * ECell::unrealize method
+ */
+static void
+ect_unrealize (ECellView *ecv)
+{
+ ECellTreeView *tree_view = (ECellTreeView *) ecv;
+
+ /* unrealize our subcell view. */
+ e_cell_unrealize (tree_view->subcell_view);
+
+ gdk_gc_unref (tree_view->gc);
+ tree_view->gc = NULL;
+
+ if (parent_class->unrealize)
+ (* parent_class->unrealize) (ecv);
+}
+
+#define INDENT_AMOUNT 16
+/*
+ * ECell::draw method
+ */
+static void
+ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
+ int model_col, int view_col, int row, gboolean selected,
+ int x1, int y1, int x2, int y2)
+{
+ ECellTreeView *tree_view = (ECellTreeView *)ecell_view;
+ ETreeModel *tree_model = e_cell_tree_get_tree_model(ecell_view->e_table_model, row);
+ ETreePath *node;
+ GdkRectangle rect, *clip_rect;
+ GtkWidget *canvas = GTK_WIDGET (tree_view->canvas);
+ GdkGC *fg_gc = canvas->style->fg_gc[GTK_STATE_ACTIVE];
+ GdkColor *background, *foreground;
+
+ int offset, subcell_offset;
+ gboolean expanded, expandable;
+
+ /* only draw the tree effects if we're the active sort */
+ if (/* XXX */ TRUE) {
+ /*
+ * need to get the following things from the model
+ * 1. depth of item.
+ * 2. whether or not it has any children.
+ * 3. whether the item is a toplevel item.
+ * 3. ... anything else?
+ */
+ node = e_cell_tree_get_node (tree_model, row);
+
+ offset = (e_tree_model_node_depth (tree_model, node) + 1) * INDENT_AMOUNT;
+ expandable = e_tree_model_node_is_expandable (tree_model, node);
+ expanded = e_tree_model_node_is_expanded (tree_model, node);
+ subcell_offset = offset;
+
+ /*
+ * Be a nice citizen: clip to the region we are supposed to draw on
+ */
+ rect.x = x1;
+ rect.y = y1;
+ rect.width = offset;
+ rect.height = y2 - y1;
+
+ gdk_gc_set_clip_rectangle (tree_view->gc, &rect);
+ gdk_gc_set_clip_rectangle (fg_gc, &rect);
+ clip_rect = &rect;
+
+ if (selected){
+ background = &canvas->style->bg [GTK_STATE_SELECTED];
+ foreground = &canvas->style->text [GTK_STATE_SELECTED];
+ } else {
+ background = &canvas->style->base [GTK_STATE_NORMAL];
+ foreground = &canvas->style->text [GTK_STATE_NORMAL];
+ }
+ gdk_gc_set_foreground (tree_view->gc, background);
+ gdk_draw_rectangle (drawable, tree_view->gc, TRUE,
+ rect.x, rect.y, rect.width, rect.height);
+ gdk_gc_set_foreground (tree_view->gc, foreground);
+
+ if (E_CELL_TREE(tree_view->cell_view.ecell)->draw_lines) {
+ /* draw our lines */
+ gdk_draw_line (drawable, tree_view->gc,
+ rect.x + offset - INDENT_AMOUNT / 2,
+ rect.y,
+ rect.x + offset - INDENT_AMOUNT / 2,
+ (e_tree_model_node_get_next (tree_model, node)
+ ? rect.y + rect.height
+ : rect.y + rect.height / 2));
+
+ gdk_draw_line (drawable, tree_view->gc,
+ rect.x + offset - INDENT_AMOUNT / 2 + 1,
+ rect.y + rect.height / 2,
+ rect.x + offset,
+ rect.y + rect.height / 2);
+
+ /* now traverse back up to the root of the tree, checking at
+ each level if the node has siblings, and drawing the
+ correct vertical pipe for it's configuration. */
+ node = e_tree_model_node_get_parent (tree_model, node);
+ offset -= INDENT_AMOUNT;
+ while (node && ! e_tree_model_node_is_root (tree_model, node)) {
+ if (e_tree_model_node_get_next(tree_model, node)) {
+ gdk_draw_line (drawable, tree_view->gc,
+ rect.x + offset - INDENT_AMOUNT / 2,
+ rect.y,
+ rect.x + offset - INDENT_AMOUNT / 2,
+ rect.y + rect.height);
+ }
+ node = e_tree_model_node_get_parent (tree_model, node);
+ offset -= INDENT_AMOUNT;
+ }
+ }
+
+ /* now draw our icon if we're expandable */
+ if (expandable) {
+ GdkPixbuf *image = expanded ? tree_expanded_pixbuf : tree_unexpanded_pixbuf;
+ int width, height;
+
+ width = gdk_pixbuf_get_width(image);
+ height = gdk_pixbuf_get_height(image);
+
+ gdk_pixbuf_render_to_drawable_alpha (image,
+ drawable,
+ 0, 0,
+ x1 + subcell_offset - INDENT_AMOUNT / 2 - width / 2,
+ y1 + (y2 - y1) / 2 - height / 2,
+ width, height,
+ GDK_PIXBUF_ALPHA_BILEVEL,
+ 128,
+ GDK_RGB_DITHER_NORMAL,
+ width, 0);
+ }
+ }
+
+ /* Now cause our subcell to draw its contents, shifted by
+ subcell_offset pixels */
+ e_cell_draw (tree_view->subcell_view, drawable,
+ model_col, view_col, row, selected,
+ x1 + subcell_offset, y1, x2 + subcell_offset, y2);
+}
+
+/*
+ * ECell::event method
+ */
+static gint
+ect_event (ECellView *ecell_view, GdkEvent *event, int model_col, int view_col, int row)
+{
+ ECellTreeView *tree_view = (ECellTreeView *) ecell_view;
+
+ switch (event->type) {
+ case GDK_BUTTON_PRESS:
+ case GDK_BUTTON_RELEASE: {
+ /* if the event happened in our area of control (and
+ we care about it), handle it. */
+ ETreeModel *tree_model = e_cell_tree_get_tree_model (ecell_view->e_table_model, row);
+ ETreePath *node = e_cell_tree_get_node (tree_model, row);
+ int offset = (e_tree_model_node_depth (tree_model, node) + 1) * INDENT_AMOUNT;
+
+ /* only activate the tree control if the click/release happens in the icon's area. */
+ if (event->button.x > (offset - INDENT_AMOUNT) && event->button.x < offset) {
+ if (e_tree_model_node_is_expandable (tree_model, node)) {
+ e_tree_model_node_set_expanded (tree_model,
+ node,
+ !e_tree_model_node_is_expanded(tree_model, node));
+ }
+ return TRUE;
+ }
+ }
+ default:
+ /* otherwise, pass it off to our subcell_view */
+ e_cell_event(tree_view->subcell_view, event, model_col, view_col, row);
+ return TRUE;
+ }
+}
+
+/*
+ * ECell::height method
+ */
+static int
+ect_height (ECellView *ecell_view, int model_col, int view_col, int row)
+{
+ ECellTreeView *tree_view = (ECellTreeView *) ecell_view;
+
+ return e_cell_height (tree_view->subcell_view, model_col, view_col, row);
+}
+
+/*
+ * ECellView::enter_edit method
+ */
+static void *
+ect_enter_edit (ECellView *ecell_view, int model_col, int view_col, int row)
+{
+ return NULL;
+}
+
+/*
+ * ECellView::leave_edit method
+ */
+static void
+ect_leave_edit (ECellView *ecell_view, int model_col, int view_col, int row, void *edit_context)
+{
+}
+
+/*
+ * GtkObject::destroy method
+ */
+static void
+ect_destroy (GtkObject *object)
+{
+ ECellTree *ect = E_CELL_TREE (object);
+
+ /* destroy our subcell */
+ gtk_object_destroy (GTK_OBJECT (ect->subcell));
+
+ GTK_OBJECT_CLASS (parent_class)->destroy (object);
+}
+
+static void
+e_cell_tree_class_init (GtkObjectClass *object_class)
+{
+ ECellClass *ecc = (ECellClass *) object_class;
+
+ object_class->destroy = ect_destroy;
+
+ ecc->new_view = ect_new_view;
+ ecc->kill_view = ect_kill_view;
+ ecc->realize = ect_realize;
+ ecc->unrealize = ect_unrealize;
+ ecc->draw = ect_draw;
+ ecc->event = ect_event;
+ ecc->height = ect_height;
+ ecc->enter_edit = ect_enter_edit;
+ ecc->leave_edit = ect_leave_edit;
+
+ parent_class = gtk_type_class (PARENT_TYPE);
+
+ /*
+ * Create our pixbuf for expanding/unexpanding
+ */
+ tree_expanded_pixbuf = gdk_pixbuf_new_from_xpm_data(tree_expanded_xpm);
+ tree_unexpanded_pixbuf = gdk_pixbuf_new_from_xpm_data(tree_unexpanded_xpm);
+}
+
+E_MAKE_TYPE(e_cell_tree, "ECellTree", ECellTree, e_cell_tree_class_init, NULL, PARENT_TYPE);
+
+void
+e_cell_tree_construct (ECellTree *ect,
+ gboolean draw_lines,
+ ECell *subcell)
+{
+ ect->subcell = subcell;
+ ect->draw_lines = draw_lines;
+}
+
+
+ECell *
+e_cell_tree_new (ETableModel *etm,
+ gboolean draw_lines,
+ ECell *subcell)
+{
+ ECellTree *ect = gtk_type_new (e_cell_tree_get_type ());
+
+ e_cell_tree_construct (ect, draw_lines, subcell);
+
+ return (ECell *) ect;
+}