gtkdlg.c

大名鼎鼎的远程登录软件putty的Symbian版源码

                    /*
                     * GTK doesn't appear to make it easy to
                     * implement a proper draggable list; so
                     * instead I'm just going to have to put an Up
                     * and a Down button to the right of the actual
                     * list box. Ah well.
                     */
                    GtkWidget *cols, *button;
                    static const gint percentages[2] = { 80, 20 };

                    cols = columns_new(4);
                    columns_set_cols(COLUMNS(cols), 2, percentages);
                    columns_add(COLUMNS(cols), w, 0, 1);
                    gtk_widget_show(w);
                    button = gtk_button_new_with_label("Up");
                    columns_add(COLUMNS(cols), button, 1, 1);
                    gtk_widget_show(button);
		    gtk_signal_connect(GTK_OBJECT(button), "clicked",
				       GTK_SIGNAL_FUNC(draglist_up), dp);
                    gtk_signal_connect(GTK_OBJECT(button), "focus_in_event",
                                       GTK_SIGNAL_FUNC(widget_focus), dp);
                    button = gtk_button_new_with_label("Down");
                    columns_add(COLUMNS(cols), button, 1, 1);
                    gtk_widget_show(button);
		    gtk_signal_connect(GTK_OBJECT(button), "clicked",
				       GTK_SIGNAL_FUNC(draglist_down), dp);
                    gtk_signal_connect(GTK_OBJECT(button), "focus_in_event",
                                       GTK_SIGNAL_FUNC(widget_focus), dp);

                    w = cols;
                }

            }
            if (ctrl->generic.label) {
                GtkWidget *label, *container;

                label = gtk_label_new(ctrl->generic.label);

		container = columns_new(4);
                if (ctrl->listbox.percentwidth == 100) {
                    columns_add(COLUMNS(container), label, 0, 1);
		    columns_force_left_align(COLUMNS(container), label);
                    columns_add(COLUMNS(container), w, 0, 1);
                } else {
                    gint percentages[2];
                    percentages[1] = ctrl->listbox.percentwidth;
                    percentages[0] = 100 - ctrl->listbox.percentwidth;
                    columns_set_cols(COLUMNS(container), 2, percentages);
                    columns_add(COLUMNS(container), label, 0, 1);
		    columns_force_left_align(COLUMNS(container), label);
                    columns_add(COLUMNS(container), w, 1, 1);
                }
                gtk_widget_show(label);
                gtk_widget_show(w);
		shortcut_add(scs, label, ctrl->listbox.shortcut,
			     SHORTCUT_UCTRL, uc);
                w = container;
            }
            break;
          case CTRL_TEXT:
	    /*
	     * Wrapping text widgets don't sit well with the GTK
	     * layout model, in which widgets state a minimum size
	     * and the whole window then adjusts to the smallest
	     * size it can sensibly take given its contents. A
	     * wrapping text widget _has_ no clear minimum size;
	     * instead it has a range of possibilities. It can be
	     * one line deep but 2000 wide, or two lines deep and
	     * 1000 pixels, or three by 867, or four by 500 and so
	     * on. It can be as short as you like provided you
	     * don't mind it being wide, or as narrow as you like
	     * provided you don't mind it being tall.
	     * 
	     * Therefore, it fits very badly into the layout model.
	     * Hence the only thing to do is pick a width and let
	     * it choose its own number of lines. To do this I'm
	     * going to cheat a little. All new wrapping text
	     * widgets will be created with a minimal text content
	     * "X"; then, after the rest of the dialog box is set
	     * up and its size calculated, the text widgets will be
	     * told their width and given their real text, which
	     * will cause the size to be recomputed in the y
	     * direction (because many of them will expand to more
	     * than one line).
	     */
            uc->text = w = gtk_label_new("X");
            gtk_misc_set_alignment(GTK_MISC(w), 0.0, 0.0);
            gtk_label_set_line_wrap(GTK_LABEL(w), TRUE);
	    uc->textsig =
		gtk_signal_connect(GTK_OBJECT(w), "size-allocate",
				   GTK_SIGNAL_FUNC(label_sizealloc), dp);
            break;
        }

	assert(w != NULL);

	columns_add(cols, w,
		    COLUMN_START(ctrl->generic.column),
		    COLUMN_SPAN(ctrl->generic.column));
	if (left)
	    columns_force_left_align(cols, w);
	gtk_widget_show(w);

	uc->toplevel = w;
	dlg_add_uctrl(dp, uc);
    }

    return ret;
}

struct selparam {
    struct dlgparam *dp;
    Panels *panels;
    GtkWidget *panel, *treeitem;
    struct Shortcuts shortcuts;
};

static void treeitem_sel(GtkItem *item, gpointer data)
{
    struct selparam *sp = (struct selparam *)data;

    panels_switch_to(sp->panels, sp->panel);

    sp->dp->shortcuts = &sp->shortcuts;
    sp->dp->currtreeitem = sp->treeitem;
}

static void window_destroy(GtkWidget *widget, gpointer data)
{
    gtk_main_quit();
}

static int tree_grab_focus(struct dlgparam *dp)
{
    int i, f;

    /*
     * See if any of the treeitems has the focus.
     */
    f = -1;
    for (i = 0; i < dp->ntreeitems; i++)
        if (GTK_WIDGET_HAS_FOCUS(dp->treeitems[i])) {
            f = i;
            break;
        }

    if (f >= 0)
        return FALSE;
    else {
        gtk_widget_grab_focus(dp->currtreeitem);
        return TRUE;
    }
}

gint tree_focus(GtkContainer *container, GtkDirectionType direction,
                gpointer data)
{
    struct dlgparam *dp = (struct dlgparam *)data;

    gtk_signal_emit_stop_by_name(GTK_OBJECT(container), "focus");
    /*
     * If there's a focused treeitem, we return FALSE to cause the
     * focus to move on to some totally other control. If not, we
     * focus the selected one.
     */
    return tree_grab_focus(dp);
}

int win_key_press(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
    struct dlgparam *dp = (struct dlgparam *)data;

    if (event->keyval == GDK_Escape && dp->cancelbutton) {
	gtk_signal_emit_by_name(GTK_OBJECT(dp->cancelbutton), "clicked");
	return TRUE;
    }

    if ((event->state & GDK_MOD1_MASK) &&
	(unsigned char)event->string[0] > 0 &&
	(unsigned char)event->string[0] <= 127) {
	int schr = (unsigned char)event->string[0];
	struct Shortcut *sc = &dp->shortcuts->sc[schr];

	switch (sc->action) {
	  case SHORTCUT_TREE:
	    tree_grab_focus(dp);
	    break;
	  case SHORTCUT_FOCUS:
	    gtk_widget_grab_focus(sc->widget);
	    break;
	  case SHORTCUT_UCTRL:
	    /*
	     * We must do something sensible with a uctrl.
	     * Precisely what this is depends on the type of
	     * control.
	     */
	    switch (sc->uc->ctrl->generic.type) {
	      case CTRL_CHECKBOX:
	      case CTRL_BUTTON:
		/* Check boxes and buttons get the focus _and_ get toggled. */
		gtk_widget_grab_focus(sc->uc->toplevel);
		gtk_signal_emit_by_name(GTK_OBJECT(sc->uc->toplevel),
					"clicked");
		break;
	      case CTRL_FILESELECT:
	      case CTRL_FONTSELECT:
		/* File/font selectors have their buttons pressed (ooer),
		 * and focus transferred to the edit box. */
		gtk_signal_emit_by_name(GTK_OBJECT(sc->uc->button),
					"clicked");
		gtk_widget_grab_focus(sc->uc->entry);
		break;
	      case CTRL_RADIO:
		/*
		 * Radio buttons are fun, because they have
		 * multiple shortcuts. We must find whether the
		 * activated shortcut is the shortcut for the whole
		 * group, or for a particular button. In the former
		 * case, we find the currently selected button and
		 * focus it; in the latter, we focus-and-click the
		 * button whose shortcut was pressed.
		 */
		if (schr == sc->uc->ctrl->radio.shortcut) {
		    int i;
		    for (i = 0; i < sc->uc->ctrl->radio.nbuttons; i++)
			if (gtk_toggle_button_get_active
			    (GTK_TOGGLE_BUTTON(sc->uc->buttons[i]))) {
			    gtk_widget_grab_focus(sc->uc->buttons[i]);
			}
		} else if (sc->uc->ctrl->radio.shortcuts) {
		    int i;
		    for (i = 0; i < sc->uc->ctrl->radio.nbuttons; i++)
			if (schr == sc->uc->ctrl->radio.shortcuts[i]) {
			    gtk_widget_grab_focus(sc->uc->buttons[i]);
			    gtk_signal_emit_by_name
				(GTK_OBJECT(sc->uc->buttons[i]), "clicked");
			}
		}
		break;
	      case CTRL_LISTBOX:
		/*
		 * If the list is really an option menu, we focus
		 * and click it. Otherwise we tell it to focus one
		 * of its children, which appears to do the Right
		 * Thing.
		 */
		if (sc->uc->optmenu) {
		    GdkEventButton bev;
		    gint returnval;

		    gtk_widget_grab_focus(sc->uc->optmenu);
		    /* Option menus don't work using the "clicked" signal.
		     * We need to manufacture a button press event :-/ */
		    bev.type = GDK_BUTTON_PRESS;
		    bev.button = 1;
		    gtk_signal_emit_by_name(GTK_OBJECT(sc->uc->optmenu),
					    "button_press_event",
					    &bev, &returnval);
		} else {
                    assert(sc->uc->list != NULL);

                    gtk_container_focus(GTK_CONTAINER(sc->uc->list),
                                        GTK_DIR_TAB_FORWARD);
		}
		break;
	    }
	    break;
	}
    }

    return FALSE;
}

int tree_key_press(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
    struct dlgparam *dp = (struct dlgparam *)data;

    if (event->keyval == GDK_Up || event->keyval == GDK_KP_Up ||
        event->keyval == GDK_Down || event->keyval == GDK_KP_Down) {
        int dir, i, j = -1;
        for (i = 0; i < dp->ntreeitems; i++)
            if (widget == dp->treeitems[i])
		break;
	if (i < dp->ntreeitems) {
	    if (event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
		dir = -1;
	    else
		dir = +1;

	    while (1) {
		i += dir;
		if (i < 0 || i >= dp->ntreeitems)
		    break;	       /* nothing in that dir to select */
		/*
		 * Determine if this tree item is visible.
		 */
		{
		    GtkWidget *w = dp->treeitems[i];
		    int vis = TRUE;
		    while (w && (GTK_IS_TREE_ITEM(w) || GTK_IS_TREE(w))) {
			if (!GTK_WIDGET_VISIBLE(w)) {
			    vis = FALSE;
			    break;
			}
			w = w->parent;
		    }
		    if (vis) {
			j = i;	       /* got one */
			break;
		    }
		}
	    }
	}
        gtk_signal_emit_stop_by_name(GTK_OBJECT(widget),
                                     "key_press_event");
        if (j >= 0) {
            gtk_signal_emit_by_name(GTK_OBJECT(dp->treeitems[j]), "toggle");
            gtk_widget_grab_focus(dp->treeitems[j]);
        }
        return TRUE;
    }

    /*
     * It's nice for Left and Right to expand and collapse tree
     * branches.
     */
    if (event->keyval == GDK_Left || event->keyval == GDK_KP_Left) {
        gtk_signal_emit_stop_by_name(GTK_OBJECT(widget),
                                     "key_press_event");
	gtk_tree_item_collapse(GTK_TREE_ITEM(widget));
	return TRUE;
    }
    if (event->keyval == GDK_Right || event->keyval == GDK_KP_Right) {
        gtk_signal_emit_stop_by_name(GTK_OBJECT(widget),
                                     "key_press_event");
	gtk_tree_item_expand(GTK_TREE_ITEM(widget));
	return TRUE;
    }

    return FALSE;
}

void shortcut_add(struct Shortcuts *scs, GtkWidget *labelw,
		  int chr, int action, void *ptr)
{
    GtkLabel *label = GTK_LABEL(labelw);
    gchar *currstr, *pattern;
    int i;

    if (chr == NO_SHORTCUT)
	return;

    chr = tolower((unsigned char)chr);

    assert(scs->sc[chr].action == SHORTCUT_EMPTY);

    scs->sc[chr].action = action;

    if (action == SHORTCUT_FOCUS) {
	scs->sc[chr].uc = NULL;
	scs->sc[chr].widget = (GtkWidget *)ptr;
    } else {
	scs->sc[chr].widget = NULL;
	scs->sc[chr].uc = (struct uctrl *)ptr;
    }

    gtk_label_get(label, &currstr);
    for (i = 0; currstr[i]; i++)
	if (tolower((unsigned char)currstr[i]) == chr) {
	    GtkRequisition req;

	    pattern = dupprintf("%*s_", i, "");

	    gtk_widget_size_request(GTK_WIDGET(label), &req);
	    gtk_label_set_pattern(label, pattern);
	    gtk_widget_set_usize(GTK_WIDGET(label), -1, req.height);

	    sfree(pattern);
	    break;
	}
}

int get_listitemheight(void)
{
    GtkWidget *listitem = gtk_list_item_new_with_label("foo");
    Gtk