#include "pager.h"
+/* Not sure if necessary, but this is the margin within which the pager will
+stop paging if it's close to the end of the text buffer */
+#define PAGER_FUZZINESS 1.0
+
/* Helper function: move the pager to the last visible position in the buffer,
and return the distance between the pager and the end of the buffer in buffer
coordinates */
gtk_text_view_get_iter_location(textview, &newpager, &pagerpos);
gtk_text_view_get_iter_location(textview, &end, &endpos);
- /*
- g_printerr("View height = %d\n", visiblerect.height);
- g_printerr("End - Pager = %d - %d = %d\n", endpos.y, pagerpos.y, endpos.y - pagerpos.y);
- */
-
*view_height = visiblerect.height;
*scroll_distance = endpos.y - pagerpos.y;
}
start_paging(winid_t win)
{
win->currently_paging = TRUE;
- g_signal_handler_unblock(win->widget, win->pager_expose_handler);
+ gtk_widget_show(win->pager);
g_signal_handler_unblock(win->widget, win->pager_keypress_handler);
}
stop_paging(winid_t win)
{
win->currently_paging = FALSE;
- g_signal_handler_block(win->widget, win->pager_expose_handler);
+ gtk_widget_hide(win->pager);
g_signal_handler_block(win->widget, win->pager_keypress_handler);
}
+/* Helper function: If the adjustment is at its maximum value, stop paging */
+static void
+check_paging(GtkAdjustment *adj, winid_t win)
+{
+ double page_size, upper, value;
+ g_object_get(adj,
+ "page-size", &page_size,
+ "upper", &upper,
+ "value", &value,
+ NULL);
+ if(value + PAGER_FUZZINESS >= upper - page_size && win->currently_paging)
+ stop_paging(win);
+}
+
+void
+pager_on_clicked(GtkButton *pager, winid_t win)
+{
+ GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(win->scrolledwindow) );
+ double upper = gtk_adjustment_get_upper(adj);
+ gtk_adjustment_set_value(adj, upper);
+ check_paging(adj, win);
+ /* Give the focus back to the text view */
+ gtk_widget_grab_focus(win->widget);
+}
+
/* When the user scrolls up in a textbuffer, start paging. */
void
pager_after_adjustment_changed(GtkAdjustment *adj, winid_t win)
move_pager_and_get_scroll_distance( GTK_TEXT_VIEW(win->widget), &view_height, &scroll_distance, TRUE );
if(scroll_distance > 0 && !win->currently_paging)
+ {
start_paging(win);
+ return;
+ }
else if(scroll_distance == 0 && win->currently_paging)
+ {
stop_paging(win);
-
- /* Refresh the widget so that any extra "more" prompts disappear */
- gtk_widget_queue_draw(win->widget);
+ return;
+ }
+
+ check_paging(adj, win);
}
/* Handle key press events in the textview while paging is active */
gboolean
pager_on_key_press_event(GtkTextView *textview, GdkEventKey *event, winid_t win)
{
- GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(win->frame) );
+ GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(win->scrolledwindow) );
gdouble page_size, upper, lower, value;
g_object_get(adj,
"page-size", &page_size,
case GDK_KEY_Page_Down: case GDK_KEY_KP_Page_Down:
case GDK_KEY_Return: case GDK_KEY_KP_Enter:
gtk_adjustment_set_value(adj, CLAMP(value + page_size, lower, upper - page_size));
+ check_paging(adj, win);
return TRUE;
case GDK_KEY_Page_Up: case GDK_KEY_KP_Page_Up:
gtk_adjustment_set_value(adj, CLAMP(value - page_size, lower, upper - page_size));
+ check_paging(adj, win);
+ return TRUE;
+ case GDK_KEY_End: case GDK_KEY_KP_End:
+ gtk_adjustment_set_value(adj, upper - page_size);
+ check_paging(adj, win);
return TRUE;
/* don't handle "up" and "down", they're used for input history */
}
return FALSE; /* if the key wasn't handled here, pass it to other handlers */
}
-/* Draw the "more" prompt on top of the buffer, after the regular draw event has run */
-gboolean
-pager_on_draw(GtkTextView *textview, cairo_t *cr, winid_t win)
-{
- /* Calculate the position of the 'more' tag */
- gint promptwidth, promptheight;
- pango_layout_get_pixel_size(win->pager_layout, &promptwidth, &promptheight);
-
- int winwidth = gtk_widget_get_allocated_width( GTK_WIDGET(textview) );
- int winheight = gtk_widget_get_allocated_height( GTK_WIDGET(textview) );
-
- /* Draw the 'more' tag */
- cairo_move_to(cr, winwidth - promptwidth, winheight - promptheight);
- pango_cairo_show_layout(cr, win->pager_layout);
-
- return FALSE; /* Propagate event further */
-}
-
/* Check whether paging should be done. This function is called after the
* textview has finished validating text positions. */
void
/* Scroll past text already read by user. This is automatic scrolling, so disable the pager_ajustment_handler
* first, that acts on the belief the scolling is performed by the user. */
- GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(win->frame));
+ GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(win->scrolledwindow));
g_signal_handler_block(adj, win->pager_adjustment_handler);
GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
GtkTextMark *pager_position = gtk_text_buffer_get_mark(buffer, "pager_position");
projects / projects / chimara / chimara.git / blobdiff