X-Git-Url: https://git.stderr.nl/gitweb?p=projects%2Fchimara%2Fchimara.git;a=blobdiff_plain;f=libchimara%2Fpager.c;fp=libchimara%2Fpager.c;h=c36edc79cdde8a9ad02501a1c029dc036fd06783;hp=efb941b46f39bb945e82292539e89c5371d09f02;hb=d9646c0bf915d1ee5d9d3601a273ff20214bfae7;hpb=0ae54d1f83e8581396969afcf6362be5c04c5f55 diff --git a/libchimara/pager.c b/libchimara/pager.c index efb941b..c36edc7 100644 --- a/libchimara/pager.c +++ b/libchimara/pager.c @@ -2,6 +2,10 @@ #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 */ @@ -32,11 +36,6 @@ move_pager_and_get_scroll_distance(GtkTextView *textview, gint *view_height, gin 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; } @@ -46,7 +45,7 @@ static void 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); } @@ -55,10 +54,35 @@ static void 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) @@ -68,19 +92,24 @@ 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, @@ -94,9 +123,15 @@ pager_on_key_press_event(GtkTextView *textview, GdkEventKey *event, winid_t win) 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 */ } @@ -104,24 +139,6 @@ pager_on_key_press_event(GtkTextView *textview, GdkEventKey *event, winid_t win) 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 @@ -147,7 +164,7 @@ pager_after_size_allocate(GtkTextView *textview, GdkRectangle *allocation, winid /* 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");