/*! \brief Completes initialitation of the widget after realization.
* \par Function Description
* This function terminates the initialization of preview's GschemToplevel
* and TOPLEVEL environments after the widget has been realized.
*
* It creates a preview page in the TOPLEVEL environment.
*
* \param [in] widget The preview widget.
* \param [in] user_data Unused user data.
*/
static void
preview_callback_realize (GtkWidget *widget,
gpointer user_data)
{
Preview *preview = PREVIEW (widget);
GschemToplevel *preview_w_current = preview->preview_w_current;
GschemPageView *preview_view = GSCHEM_PAGE_VIEW (preview);
g_return_if_fail (preview_view != NULL);
PAGE *preview_page = preview_view->page;
g_return_if_fail (preview_page != NULL);
TOPLEVEL *preview_toplevel = preview_page->toplevel;
g_return_if_fail (preview_toplevel != NULL);
preview_w_current->window = preview_w_current->drawing_area->window;
gtk_widget_grab_focus (preview_w_current->drawing_area);
preview_w_current->win_width = preview_w_current->drawing_area->allocation.width;
preview_w_current->win_height = preview_w_current->drawing_area->allocation.height;
preview_w_current->drawable = preview_w_current->window;
x_window_setup_gc (preview_w_current);
gschem_page_view_zoom_extents (preview_view, NULL);
}
/*! \brief Invalidate current path creation screen region.
* \par Function Description
* Invalidates the screen region occupied by the current path creation
* preview and control handle helpers.
*/
void
o_path_invalidate_rubber (GschemToplevel *w_current)
{
int added_sections;
int min_x, min_y, max_x, max_y;
g_return_if_fail (w_current != NULL);
/* Calculate any new sections */
added_sections = path_next_sections (w_current);
path_rubber_bbox (w_current, w_current->temp_path,
&min_x, &max_y, &max_x, &min_y);
/* Expand the bounding box to include any control handles
* that are currently being drawn. */
min_x = MIN (min_x, w_current->second_wx);
max_x = MAX (max_x, w_current->second_wx);
min_y = MIN (min_y, w_current->second_wy);
max_y = MAX (max_y, w_current->second_wy);
gschem_page_view_invalidate_world_rect (GSCHEM_PAGE_VIEW (w_current->drawing_area),
min_x,
min_y,
max_x,
max_y);
w_current->temp_path->num_sections -= added_sections;
}
/*! \brief Get the selection adapter
*
* \param [in] w_current The current gschem toplevel
* \return The selection adapter
*/
GschemPageView*
gschem_toplevel_get_current_page_view (GschemToplevel *w_current)
{
g_return_val_if_fail (w_current != NULL, NULL);
return GSCHEM_PAGE_VIEW (w_current->drawing_area);
}
static void
preview_init (GschemPreview *preview)
{
struct event_reg_t {
gchar *detailed_signal;
GCallback c_handler;
} drawing_area_events[] = {
{ "realize", G_CALLBACK (preview_callback_realize) },
{ "expose_event", G_CALLBACK (x_event_expose) },
{ "button_press_event", G_CALLBACK (preview_callback_button_press) },
{ "configure_event", G_CALLBACK (x_event_configure) },
{ "scroll_event", G_CALLBACK (preview_event_scroll) },
{ NULL, NULL }
}, *tmp;
GschemToplevel *preview_w_current;
preview_w_current = gschem_toplevel_new ();
gschem_toplevel_set_toplevel (preview_w_current, s_toplevel_new ());
preview_w_current->toplevel->load_newer_backup_func =
x_fileselect_load_backup;
preview_w_current->toplevel->load_newer_backup_data =
preview_w_current;
o_text_set_rendered_bounds_func (preview_w_current->toplevel,
o_text_get_rendered_bounds,
preview_w_current);
i_vars_set (preview_w_current);
/* be sure to turn off scrollbars */
preview_w_current->scrollbars_flag = FALSE;
/* be sure to turn off the grid */
gschem_options_set_grid_mode (preview_w_current->options, GRID_MODE_NONE);
/* preview_w_current windows don't have toolbars */
preview_w_current->handleboxes = FALSE;
preview_w_current->toolbars = FALSE;
preview_w_current->drawing_area = GTK_WIDGET (preview);
preview->preview_w_current = preview_w_current;
preview->active = FALSE;
preview->filename = NULL;
preview->buffer = NULL;
GSCHEM_PAGE_VIEW (preview)->page = s_page_new (preview->preview_w_current->toplevel, "preview");
gtk_widget_set_events (GTK_WIDGET (preview),
GDK_EXPOSURE_MASK |
GDK_POINTER_MOTION_MASK |
GDK_BUTTON_PRESS_MASK);
for (tmp = drawing_area_events; tmp->detailed_signal != NULL; tmp++) {
g_signal_connect (GTK_WIDGET (preview),
tmp->detailed_signal,
tmp->c_handler,
preview_w_current);
}
}
/*! \brief Completes initialitation of the widget after realization.
* \par Function Description
* This function terminates the initialization of the preview widget
* after it has been realized.
*
* \param [in] widget The preview widget.
* \param [in] user_data Unused user data.
*/
static void
preview_callback_realize (GtkWidget *widget, gpointer user_data)
{
g_return_if_fail (widget != NULL);
gtk_widget_grab_focus (widget);
gschem_page_view_zoom_extents (GSCHEM_PAGE_VIEW (widget), NULL);
}
/*! \brief get the filename for the current page
*/
static char*
preview_get_filename (Preview *preview)
{
PAGE *page = gschem_page_view_get_page (GSCHEM_PAGE_VIEW (preview));
g_return_val_if_fail (page != NULL, "");
return page->page_filename;
}
/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*
* \note
* used in button cancel code in x_events.c
*/
void o_picture_invalidate_rubber (GschemToplevel *w_current)
{
g_return_if_fail (w_current != NULL);
gschem_page_view_invalidate_world_rect (GSCHEM_PAGE_VIEW (w_current->drawing_area),
GET_PICTURE_LEFT (w_current),
GET_PICTURE_TOP (w_current),
GET_PICTURE_LEFT (w_current) + GET_PICTURE_WIDTH (w_current),
GET_PICTURE_TOP (w_current) + GET_PICTURE_HEIGHT (w_current));
}
/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*/
void a_zoom_box_invalidate_rubber (GschemToplevel *w_current)
{
g_return_if_fail (w_current != NULL);
gschem_page_view_invalidate_world_rect (GSCHEM_PAGE_VIEW (w_current->drawing_area),
w_current->first_wx,
w_current->first_wy,
w_current->second_wx,
w_current->second_wy);
}
static gboolean
preview_event_configure (GtkWidget *widget,
GdkEventConfigure *event,
gpointer user_data)
{
gboolean retval;
GschemToplevel *preview_w_current = PREVIEW (widget)->preview_w_current;
retval = x_event_configure (GSCHEM_PAGE_VIEW (widget), event, preview_w_current);
return retval;
}
void
o_path_invalidate_rubber_grips (GschemToplevel *w_current)
{
int min_x, min_y, max_x, max_y;
path_rubber_bbox (w_current, NULL,
&min_x, &max_y, &max_x, &min_y);
gschem_page_view_invalidate_world_rect (GSCHEM_PAGE_VIEW (w_current->drawing_area),
min_x,
min_y,
max_x,
max_y);
}
/*! \brief Handles the press on a mouse button.
* \par Function Description
* It handles the user inputs.
*
* Three action are available: zoom in, pan and zoom out on preview display.
*
* \param [in] widget The preview widget.
* \param [in] event The event structure.
* \param [in] user_data Unused user data.
* \returns FALSE to propagate the event further.
*/
static gboolean
preview_callback_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
Preview *preview = PREVIEW (widget);
GschemToplevel *preview_w_current = preview->preview_w_current;
gint wx, wy;
if (!preview->active) {
return TRUE;
}
switch (event->button) {
case 1: /* left mouse button: zoom in */
a_zoom (preview_w_current,
GSCHEM_PAGE_VIEW (preview),
ZOOM_IN,
HOTKEY);
gschem_page_view_invalidate_all (GSCHEM_PAGE_VIEW (widget));
break;
case 2: /* middle mouse button: pan */
if (!x_event_get_pointer_position(preview_w_current, FALSE, &wx, &wy))
return FALSE;
gschem_page_view_pan (GSCHEM_PAGE_VIEW (preview), wx, wy);
break;
case 3: /* right mouse button: zoom out */
a_zoom (preview_w_current,
GSCHEM_PAGE_VIEW (preview),
ZOOM_OUT,
HOTKEY);
gschem_page_view_invalidate_all (GSCHEM_PAGE_VIEW (widget));
break;
}
return FALSE;
}
/*! \todo Finish function documentation!!!
* \brief
* \par Function Description
*
* \param [in] widget The GschemPageView with the scroll event.
* \param [in] event
* \param [in] w_current
*/
gint x_event_scroll (GtkWidget *widget, GdkEventScroll *event,
GschemToplevel *w_current)
{
GtkAdjustment *adj;
gboolean pan_xaxis = FALSE;
gboolean pan_yaxis = FALSE;
gboolean zoom = FALSE;
int pan_direction = 1;
int zoom_direction = ZOOM_IN;
GschemPageView *view = NULL;
PAGE *page = NULL;
g_return_val_if_fail ((w_current != NULL), 0);
view = GSCHEM_PAGE_VIEW (widget);
g_return_val_if_fail ((view != NULL), 0);
page = gschem_page_view_get_page (view);
if (page == NULL) {
return FALSE; /* we cannot zoom page if it doesn't exist :) */
}
/* update the state of the modifiers */
w_current->SHIFTKEY = (event->state & GDK_SHIFT_MASK ) ? 1 : 0;
w_current->CONTROLKEY = (event->state & GDK_CONTROL_MASK) ? 1 : 0;
w_current->ALTKEY = (event->state & GDK_MOD1_MASK) ? 1 : 0;
if (w_current->scroll_wheel == SCROLL_WHEEL_CLASSIC) {
/* Classic gschem behaviour */
zoom = !w_current->CONTROLKEY && !w_current->SHIFTKEY;
pan_yaxis = !w_current->CONTROLKEY && w_current->SHIFTKEY;
pan_xaxis = w_current->CONTROLKEY && !w_current->SHIFTKEY;
} else {
/* GTK style behaviour */
zoom = w_current->CONTROLKEY && !w_current->SHIFTKEY;
pan_yaxis = !w_current->CONTROLKEY && !w_current->SHIFTKEY;
pan_xaxis = !w_current->CONTROLKEY && w_current->SHIFTKEY;
}
/* If the user has a left/right scroll wheel, always scroll the y-axis */
if (event->direction == GDK_SCROLL_LEFT ||
event->direction == GDK_SCROLL_RIGHT) {
zoom = FALSE;
pan_yaxis = FALSE;
pan_xaxis = TRUE;
}
/* You must have scrollbars enabled if you want to use the scroll wheel to pan */
if (!w_current->scrollbars_flag) {
pan_xaxis = FALSE;
pan_yaxis = FALSE;
}
switch (event->direction) {
case GDK_SCROLL_UP:
case GDK_SCROLL_LEFT:
pan_direction = -1;
zoom_direction = ZOOM_IN;
break;
case GDK_SCROLL_DOWN:
case GDK_SCROLL_RIGHT:
pan_direction = 1;
zoom_direction = ZOOM_OUT;
break;
}
if (zoom) {
/*! \todo Change "HOTKEY" TO new "MOUSE" specifier? */
a_zoom(w_current, GSCHEM_PAGE_VIEW (widget), zoom_direction, HOTKEY);
}
if (pan_xaxis) {
adj = gschem_page_view_get_hadjustment (GSCHEM_PAGE_VIEW (widget));
g_return_val_if_fail (adj != NULL, TRUE);
gtk_adjustment_set_value(adj, MIN(adj->value + pan_direction *
(adj->page_increment /
w_current->scrollpan_steps),
adj->upper - adj->page_size));
}
if (pan_yaxis) {
adj = gschem_page_view_get_vadjustment (GSCHEM_PAGE_VIEW (widget));
g_return_val_if_fail (adj != NULL, TRUE);
gtk_adjustment_set_value(adj, MIN(adj->value + pan_direction *
(adj->page_increment /
w_current->scrollpan_steps),
adj->upper - adj->page_size));
}
if (w_current->undo_panzoom && (zoom || pan_xaxis || pan_yaxis)) {
o_undo_savestate_old(w_current, UNDO_VIEWPORT_ONLY);
}
x_event_faked_motion (view, NULL);
/* Stop further processing of this signal */
return TRUE;
}
/*! \brief Updates the preview widget.
* \par Function Description
* This function updates the preview: if the preview is active and a
* filename has been given, it opens the file and displays
* it. Otherwise it displays a blank page.
*
* \param [in] preview The preview widget.
*/
static void
preview_update (Preview *preview)
{
int left, top, right, bottom;
int width, height;
GError * err = NULL;
GschemPageView *preview_view = GSCHEM_PAGE_VIEW (preview);
g_return_if_fail (preview_view != NULL);
PAGE *preview_page = gschem_page_view_get_page (preview_view);
if (preview_page == NULL) {
return;
}
TOPLEVEL *preview_toplevel = preview_page->toplevel;
/* delete old preview */
s_page_delete_objects (preview_toplevel, preview_page);
if (preview->active) {
g_assert ((preview->filename == NULL) || (preview->buffer == NULL));
if (preview->filename != NULL) {
/* open up file in current page */
f_open_flags (preview_toplevel, preview_page,
preview->filename,
F_OPEN_RC | F_OPEN_RESTORE_CWD, NULL);
/* test value returned by f_open... - Fix me */
/* we should display something if there an error occured - Fix me */
}
if (preview->buffer != NULL) {
/* Load the data buffer */
GList * objects = o_read_buffer (preview_toplevel,
NULL, preview->buffer, -1,
_("Preview Buffer"), &err);
if (err == NULL) {
s_page_append_list (preview_toplevel, preview_page,
objects);
}
else {
s_page_append (preview_toplevel, preview_page,
o_text_new(preview_toplevel, OBJ_TEXT, 2, 100, 100, LOWER_MIDDLE, 0,
err->message, 10, VISIBLE, SHOW_NAME_VALUE));
g_error_free(err);
}
}
}
if (world_get_object_glist_bounds (preview_toplevel,
s_page_objects (preview_page),
&left, &top,
&right, &bottom)) {
/* Clamp the canvas size to the extents of the page being previewed */
width = right - left;
height = bottom - top;
GschemPageGeometry *geometry = gschem_page_view_get_page_geometry (preview_view);
geometry->world_left = left - ((double)width * OVER_ZOOM_FACTOR);
geometry->world_right = right + ((double)width * OVER_ZOOM_FACTOR);
geometry->world_top = top - ((double)height * OVER_ZOOM_FACTOR);
geometry->world_bottom = bottom + ((double)height * OVER_ZOOM_FACTOR);
}
/* display current page (possibly empty) */
gschem_page_view_zoom_extents (preview_view, NULL);
}
