void
ddisplay_set_origo(DDisplay *ddisp, coord x, coord y)
{
Rectangle *extents = &ddisp->diagram->data->extents;
Rectangle *visible = &ddisp->visible;
int width, height;
g_return_if_fail (ddisp->renderer != NULL);
/* updaterar origo+visible+rulers */
ddisp->origo.x = x;
ddisp->origo.y = y;
if (ddisp->zoom_factor<DDISPLAY_MIN_ZOOM)
ddisp->zoom_factor = DDISPLAY_MIN_ZOOM;
if (ddisp->zoom_factor > DDISPLAY_MAX_ZOOM)
ddisp->zoom_factor = DDISPLAY_MAX_ZOOM;
width = dia_renderer_get_width_pixels (ddisp->renderer);
height = dia_renderer_get_height_pixels (ddisp->renderer);
visible->left = ddisp->origo.x;
visible->top = ddisp->origo.y;
visible->right = ddisp->origo.x + ddisplay_untransform_length(ddisp, width);
visible->bottom = ddisp->origo.y + ddisplay_untransform_length(ddisp, height);
ddisplay_update_rulers (ddisp, extents, visible);
}
/** Scroll display to where point x,y (window coords) is visible */
gboolean
ddisplay_autoscroll(DDisplay *ddisp, int x, int y)
{
guint16 width, height;
Point scroll;
if (! ddisp->autoscroll)
return FALSE;
scroll.x = scroll.y = 0;
width = GTK_WIDGET(ddisp->canvas)->allocation.width;
height = GTK_WIDGET(ddisp->canvas)->allocation.height;
if (x < 0)
{
scroll.x = x;
}
else if ( x > width)
{
scroll.x = x - width;
}
if (y < 0)
{
scroll.y = y;
}
else if (y > height)
{
scroll.y = y - height;
}
if ((scroll.x != 0) || (scroll.y != 0))
{
gboolean scrolled;
scroll.x = ddisplay_untransform_length(ddisp, scroll.x);
scroll.y = ddisplay_untransform_length(ddisp, scroll.y);
scrolled = ddisplay_scroll(ddisp, &scroll);
if (scrolled) {
ddisplay_flush(ddisp);
return TRUE;
}
}
return FALSE;
}
void
ddisplay_add_update_pixels(DDisplay *ddisp, Point *point,
int pixel_width, int pixel_height)
{
Rectangle rect;
real size_x, size_y;
size_x = ddisplay_untransform_length(ddisp, pixel_width+1);
size_y = ddisplay_untransform_length(ddisp, pixel_height+1);
rect.left = point->x - size_x/2.0;
rect.top = point->y - size_y/2.0;
rect.right = point->x + size_x/2.0;
rect.bottom = point->y + size_y/2.0;
ddisplay_add_update(ddisp, &rect);
}
/** Marks a rectangle for update, with a pixel border around it.
*/
void
ddisplay_add_update_with_border(DDisplay *ddisp, const Rectangle *rect,
int pixel_border)
{
Rectangle r;
real size = ddisplay_untransform_length(ddisp, pixel_border+1);
r.left = rect->left-size;
r.top = rect->top-size;
r.right = rect->right+size;
r.bottom = rect->bottom+size;
ddisplay_add_update(ddisp, &r);
}
void
pagebreak_draw(DDisplay *ddisp, Rectangle *update)
{
DiaRenderer *renderer = ddisp->renderer;
DiaInteractiveRendererInterface *irenderer;
int width = dia_renderer_get_width_pixels(ddisp->renderer);
int height = dia_renderer_get_height_pixels(ddisp->renderer);
irenderer = DIA_GET_INTERACTIVE_RENDERER_INTERFACE (renderer);
if (prefs.pagebreak.visible) {
Diagram *dia = ddisp->diagram;
real origx = 0, origy = 0, pos;
real pwidth = dia->data->paper.width;
real pheight = dia->data->paper.height;
int x,y;
DIA_RENDERER_GET_CLASS(renderer)->set_linewidth(renderer, 0.0);
if (prefs.pagebreak.solid)
DIA_RENDERER_GET_CLASS(renderer)->set_linestyle(renderer, LINESTYLE_SOLID, 0.0);
else
DIA_RENDERER_GET_CLASS(renderer)->set_linestyle(renderer, LINESTYLE_DOTTED,
ddisplay_untransform_length(ddisp, 31));
if (dia->data->paper.fitto) {
origx = dia->data->extents.left;
origy = dia->data->extents.top;
}
/* vertical lines ... */
pos = origx + ceil((update->left - origx) / pwidth) * pwidth;
while (pos <= update->right) {
ddisplay_transform_coords(ddisp, pos,0,&x,&y);
irenderer->draw_pixel_line(renderer,
x, 0, x, height,
&dia->pagebreak_color);
pos += pwidth;
}
/* Horizontal lines: */
pos = origy + ceil((update->top - origy) / pheight) * pheight;
while (pos <= update->bottom) {
ddisplay_transform_coords(ddisp, 0,pos,&x,&y);
irenderer->draw_pixel_line(renderer,
0, y, width, y,
&dia->pagebreak_color);
pos += pheight;
}
}
}
static void
grid_draw_horizontal_lines(DDisplay *ddisp, Rectangle *update, real length)
{
int x, y;
real pos;
int height, width;
guint major_lines = ddisp->diagram->grid.major_lines;
DiaRenderer *renderer = ddisp->renderer;
DiaInteractiveRendererInterface *irenderer;
int major_count = 0;
irenderer = DIA_GET_INTERACTIVE_RENDERER_INTERFACE (renderer);
pos = ceil( update->top / length ) * length;
ddisplay_transform_coords(ddisp, update->left, pos, &x, &y);
ddisplay_transform_coords(ddisp, update->right, update->bottom, &width, &height);
/*
Explanatory note from Lawrence Withers ([email protected]):
Think about it in terms of the maths and the modulo arithmetic; we
have a number P such that P < 0, and we want to find a number Q
such that Q >= 0, but (P % major_count) == (Q % major_count). To
do this, we say Q = P - (P * major_count), which is guaranteed to
give a correct answer if major_count > 0 (since the addition of
anf multiple of major_count won't alter the modulo).
*/
if (major_lines) {
major_count = ROUND (pos/length);
if(major_count < 0) major_count -= major_lines * major_count;
major_count %= major_lines;
}
while (y < height) {
if (major_lines) {
if (major_count == 0)
DIA_RENDERER_GET_CLASS(renderer)->set_linestyle(renderer, LINESTYLE_SOLID, 0.0);
else
DIA_RENDERER_GET_CLASS(renderer)->set_linestyle(renderer, LINESTYLE_DOTTED,
ddisplay_untransform_length(ddisp, 31));
major_count = (major_count+1)%major_lines;
}
irenderer->draw_pixel_line(renderer, x, y, width, y,
&ddisp->diagram->grid.colour);
pos += length;
ddisplay_transform_coords(ddisp, update->left, pos, &x, &y);
}
}
/** Calculate the width (in cm) of the gap between grid lines in dynamic
* grid mode.
*/
static void
calculate_dynamic_grid(DDisplay *ddisp, real *width_x, real *width_y)
{
real zoom = ddisplay_untransform_length(ddisp, 1.0);
real ret, tmp;
/* Twiddle zoom to make change-over appropriate */
zoom *= 5;
ret = pow(10, ceil(log10(zoom)));
/* dont' make it too small or huge (this is in pixels) */
tmp = ddisplay_transform_length(ddisp, ret);
if (tmp < 10.0)
ret *= 2.0;
else if (tmp > 35.0)
ret /= 2.0;
*width_x = ret;
*width_y = ret;
}
static void
grid_draw_vertical_lines(DDisplay *ddisp, Rectangle *update, real length)
{
int x = 0, y = 0;
real pos;
int height, width;
guint major_lines = ddisp->diagram->grid.major_lines;
DiaRenderer *renderer = ddisp->renderer;
DiaInteractiveRendererInterface *irenderer;
int major_count = 0;
irenderer = DIA_GET_INTERACTIVE_RENDERER_INTERFACE (renderer);
pos = ceil( update->left / length ) * length;
ddisplay_transform_coords(ddisp, update->right, update->bottom, &width, &height);
if (major_lines) {
major_count = ROUND (pos/length);
if(major_count < 0) major_count -= major_lines * major_count;
major_count %= major_lines;
}
while (x < width) {
ddisplay_transform_coords(ddisp, pos, update->top, &x, &y);
if (major_lines) {
if (major_count == 0)
DIA_RENDERER_GET_CLASS(renderer)->set_linestyle(renderer, LINESTYLE_SOLID, 0.0);
else
DIA_RENDERER_GET_CLASS(renderer)->set_linestyle(renderer, LINESTYLE_DOTTED,
ddisplay_untransform_length(ddisp, 31));
major_count = (major_count+1)%major_lines;
}
irenderer->draw_pixel_line(renderer, x, y, x, height,
&ddisp->diagram->grid.colour);
pos += length;
}
}
static DiaObject *
click_select_object(DDisplay *ddisp, Point *clickedpoint,
GdkEventButton *event)
{
Diagram *diagram;
real click_distance;
DiaObject *obj;
diagram = ddisp->diagram;
/* Find the closest object to select it: */
click_distance = ddisplay_untransform_length(ddisp, 3.0);
obj = diagram_find_clicked_object(diagram, clickedpoint,
click_distance);
if (obj!=NULL) {
/* Selected an object. */
GList *already;
/*printf("Selected object!\n");*/
already = g_list_find(diagram->data->selected, obj);
if (already == NULL) { /* Not already selected */
/*printf("Not already selected\n");*/
if (!(event->state & GDK_SHIFT_MASK)) {
/* Not Multi-select => remove current selection */
diagram_remove_all_selected(diagram, TRUE);
}
diagram_select(diagram, obj);
/* To be removed once text edit mode is stable. By then,
* we don't want to automatically edit selected objects.
textedit_activate_object(ddisp, obj, clickedpoint);
*/
ddisplay_do_update_menu_sensitivity(ddisp);
object_add_updates_list(diagram->data->selected, diagram);
diagram_flush(diagram);
return obj;
} else { /* Clicked on already selected. */
/*printf("Already selected\n");*/
/* To be removed once text edit mode is stable. By then,
* we don't want to automatically edit selected objects.
textedit_activate_object(ddisp, obj, clickedpoint);
*/
object_add_updates_list(diagram->data->selected, diagram);
diagram_flush(diagram);
if (event->state & GDK_SHIFT_MASK) { /* Multi-select */
/* Remove the selected selected */
ddisplay_do_update_menu_sensitivity(ddisp);
diagram_unselect_object(diagram, (DiaObject *)already->data);
diagram_flush(ddisp->diagram);
} else {
return obj;
}
}
} /* Else part moved to allow union/intersection select */
return NULL;
}
static void
create_object_button_press(CreateObjectTool *tool, GdkEventButton *event,
DDisplay *ddisp)
{
Point clickedpoint, origpoint;
Handle *handle1;
Handle *handle2;
DiaObject *obj;
real click_distance;
ddisplay_untransform_coords(ddisp,
(int)event->x, (int)event->y,
&clickedpoint.x, &clickedpoint.y);
origpoint = clickedpoint;
snap_to_grid(ddisp, &clickedpoint.x, &clickedpoint.y);
click_distance = ddisplay_untransform_length(ddisp, 3.0);
obj = dia_object_default_create (tool->objtype, &clickedpoint,
tool->user_data,
&handle1, &handle2);
tool->obj = obj; /* ensure that tool->obj is initialised in case we
return early. */
if (!obj) {
tool->moving = FALSE;
tool->handle = NULL;
message_error(_("'%s' creation failed"), tool->objtype ? tool->objtype->name : "NULL");
return;
}
diagram_add_object(ddisp->diagram, obj);
/* Try a connect */
if (handle1 != NULL &&
handle1->connect_type != HANDLE_NONCONNECTABLE) {
ConnectionPoint *connectionpoint;
connectionpoint =
object_find_connectpoint_display(ddisp, &origpoint, obj, TRUE);
if (connectionpoint != NULL) {
(obj->ops->move)(obj, &origpoint);
}
}
if (!(event->state & GDK_SHIFT_MASK)) {
/* Not Multi-select => remove current selection */
diagram_remove_all_selected(ddisp->diagram, TRUE);
}
diagram_select(ddisp->diagram, obj);
/* Connect first handle if possible: */
if ((handle1!= NULL) &&
(handle1->connect_type != HANDLE_NONCONNECTABLE)) {
object_connect_display(ddisp, obj, handle1, TRUE);
}
object_add_updates(obj, ddisp->diagram);
ddisplay_do_update_menu_sensitivity(ddisp);
diagram_flush(ddisp->diagram);
if (handle2 != NULL) {
tool->handle = handle2;
tool->moving = TRUE;
tool->last_to = handle2->pos;
gdk_pointer_grab (gtk_widget_get_window(ddisp->canvas), FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, event->time);
ddisplay_set_all_cursor(get_cursor(CURSOR_SCROLL));
} else {
diagram_update_extents(ddisp->diagram);
tool->moving = FALSE;
}
}