Fix bug #215... desensitize menu items based on the number of selected

2001-08-09  Peter Williams  <peterw@ximian.com>

	Fix bug #215... desensitize menu items based on the number of
	selected messages (and whether there's a message in the pane)

	* folder-browser-ui.c (folder_browser_ui_add_message): Sensitize
	the menu items appropriately based on the old state.
	(fbui_sensitize_items): New function. Set the sensitivity of a
	list of commands.
	(folder_browser_ui_set_selection_state): New function. Move the FB
	to a new state of selected-ness, and sensitize menu items
	appropriately.
	(folder_browser_ui_message_loaded): New function. When notified
	that a message has been loaded, sensitize some menu items.

	* folder-browser-ui.h: Prototype new functions.

	* folder-browser.h: New enumeration,
	FolderBrowserSelectionState, that records the previous state
	of the selection (_NONE, _SINGLE, _MULTIPLE).

	* folder-browser.c (got_folder): If the component is set,
	set our selection state to _NONE, because that's the default
	state of the ETree.
	(on_selection_changed): When the number of selected messages
	is updated, notify the FBUI code of our new state.
	(folder_browser_gui_init): Hook up to the selection_changed
	signal and default to the _NONE selection state.
	(done_message_selected): Notify when a message is loaded.

2001-08-08  Peter Williams  <peterw@ximian.com>

	* mail-folder-cache.c: Display how many messages are selected,
	too.
	(make_folder_status): If multiple messages are selected, add that
	to the string (the 0 and 1 cases are boring)
	(selection_changed): New function, update the selected count.
	(mail_folder_cache_note_fb): Connect to the selection_changed
	signal.

svn path=/trunk/; revision=12012

1 files changed, 43 insertions, 1 deletions

diff --git a/mail/folder-browser.c b/mail/folder-browser.c
index 348d0aa8d0..269f59b9a6 100644
--- a/mail/folder-browser.c
+++ b/mail/folder-browser.c
@@ -47,6 +47,7 @@
 #include "mail-autofilter.h"
 #include "mail-mt.h"
 #include "mail-folder-cache.h"
+#include "folder-browser-ui.h"
 
 #include "mail-local.h"
 #include "mail-config.h"
@@ -712,6 +713,11 @@ got_folder(char *uri, CamelFolder *folder, void *data)
 	mail_folder_cache_note_folder (fb->uri, folder);
 	mail_folder_cache_note_fb (fb->uri, fb);
 
+	/* when loading a new folder, nothing is selected initially */
+
+	if (fb->uicomp)
+		folder_browser_ui_set_selection_state (fb, FB_SELSTATE_NONE);
+
  done:
 	gtk_object_unref (GTK_OBJECT (fb));
 	
@@ -1597,6 +1603,33 @@ on_double_click (ETree *tree, gint row, ETreePath path, gint col, GdkEvent *even
 }
 
 static void
+on_selection_changed (GtkObject *obj, gpointer user_data)
+{
+	FolderBrowser *fb = FOLDER_BROWSER (user_data);
+	FolderBrowserSelectionState state;
+
+	/* we can get this signal at strange times...
+	 * if no uicomp, don't even bother */
+
+	if (fb->uicomp == NULL)
+		return;
+
+	switch (e_selection_model_selected_count (E_SELECTION_MODEL (obj))) {
+	case 0:
+		state = FB_SELSTATE_NONE;
+		break;
+	case 1:
+		state = FB_SELSTATE_SINGLE;
+		break;
+	default:
+		state = FB_SELSTATE_MULTIPLE;
+		break;
+	}
+
+	folder_browser_ui_set_selection_state (fb, state);
+}
+
+static void
 fb_resize_cb (GtkWidget *w, GtkAllocation *a, FolderBrowser *fb)
 {	
 	if (fb->preview_shown)
@@ -1606,6 +1639,8 @@ fb_resize_cb (GtkWidget *w, GtkAllocation *a, FolderBrowser *fb)
 static void
 folder_browser_gui_init (FolderBrowser *fb)
 {
+	ESelectionModel *esm;
+
 	/* The panned container */
 	fb->vpaned = e_vpaned_new ();
 	gtk_widget_show (fb->vpaned);
@@ -1643,12 +1678,17 @@ folder_browser_gui_init (FolderBrowser *fb)
 	gtk_signal_connect (GTK_OBJECT (fb->search), "menu_activated",
 			    GTK_SIGNAL_FUNC (folder_browser_search_menu_activated), fb);
 	
+	
 	gtk_table_attach (GTK_TABLE (fb), GTK_WIDGET (fb->search),
 			  0, 1, 0, 1,
 			  GTK_FILL | GTK_EXPAND,
 			  0,
 			  0, 0);
-	
+
+	esm = e_tree_get_selection_model (E_TREE (fb->message_list->tree));
+	gtk_signal_connect (GTK_OBJECT (esm), "selection_changed", on_selection_changed, fb);
+	fb->selection_state = FB_SELSTATE_NONE; /* default to none */
+
 	e_paned_add1 (E_PANED (fb->vpaned), GTK_WIDGET (fb->message_list));
 	gtk_widget_show (GTK_WIDGET (fb->message_list));
 	
@@ -1687,6 +1727,8 @@ done_message_selected (CamelFolder *folder, char *uid, CamelMimeMessage *msg, vo
 		return;
 	
 	mail_display_set_message (fb->mail_display, (CamelMedium *)msg);
+	folder_browser_ui_message_loaded (fb);
+
 	/* FIXME: should this signal be emitted here?? */
 	gtk_signal_emit (GTK_OBJECT (fb), folder_browser_signals [MESSAGE_LOADED], uid);