static void
gv_point_tool_button_press(GvTool *tool, GdkEventButton *event)
{
if (event->button == 1)
{
GvVertex vertex;
if (!gv_point_tool_configure(tool)) return;
/* Get pointer location */
gv_view_area_map_pointer(GV_TOOL(tool)->view, event->x, event->y,
&vertex.x, &vertex.y);
if( !gv_tool_check_bounds( GV_TOOL(tool), vertex.x, vertex.y ) )
return;
/* Add a new point */
if( GV_IS_POINT_LAYER(GV_POINT_TOOL(tool)->layer) )
{
gv_point_layer_select_new_point(
GV_POINT_LAYER(GV_POINT_TOOL(tool)->layer),
&vertex);
}
else
{
GvShape *new_point;
new_point = gv_shape_new( GVSHAPE_POINT );
gv_shape_set_xyz( new_point, 0, 0, vertex.x, vertex.y, 0.0 );
gv_shapes_layer_select_new_shape(
GV_SHAPES_LAYER(GV_POINT_TOOL(tool)->layer),
new_point );
}
}
}
static gboolean
gv_rect_tool_button_release(GvTool *r_tool, GdkEventButton *event)
{
GvRectTool *tool = GV_RECT_TOOL(r_tool);
if (event->button == 1 && tool->drawing )
{
GvShape *shape;
if (!gv_rect_tool_configure(tool)) return FALSE;
/* Map pointer position to tail vertex */
gv_view_area_map_pointer(GV_TOOL(tool)->view, event->x, event->y,
&tool->v_tail.x, &tool->v_tail.y);
gv_tool_clamp_to_bounds( GV_TOOL(tool),
&tool->v_tail.x, &tool->v_tail.y );
if( tool->v_tail.x != tool->v_head.x
&& tool->v_tail.y != tool->v_head.y )
{
/* create the new rectangle */
shape = gv_shape_new( GVSHAPE_AREA );
gv_shape_add_node( shape, 0, tool->v_tail.x, tool->v_tail.y, 0 );
gv_shape_add_node( shape, 0, tool->v_tail.x, tool->v_head.y, 0 );
gv_shape_add_node( shape, 0, tool->v_head.x, tool->v_head.y, 0 );
gv_shape_add_node( shape, 0, tool->v_head.x, tool->v_tail.y, 0 );
gv_shape_add_node( shape, 0, tool->v_tail.x, tool->v_tail.y, 0 );
gv_shapes_layer_select_new_shape( GV_SHAPES_LAYER(tool->layer),
shape );
}
tool->drawing = FALSE;
return FALSE;
}
if (event->button == 1 && tool->reshaping )
{
if (!gv_rect_tool_configure(tool)) return FALSE;
/* Reopen undo. Push a memento describing the ring addition */
gv_undo_enable();
gv_undo_open();
/* Map pointer position to tail vertex */
gv_view_area_map_pointer(GV_TOOL(tool)->view, event->x, event->y,
&tool->v_tail.x, &tool->v_tail.y);
gv_rect_tool_reshape( tool, tool->v_tail.x, tool->v_tail.y );
tool->reshaping = FALSE;
}
return FALSE;
}
GvSymbolObj *
gv_symbol_manager_get_symbol(GvSymbolManager *manager, const char *symbol_name)
{
gchar *pszOpenEVHome = NULL;
gchar *pszSymbolsDir = NULL;
gchar *pszAbsolutePath = NULL;
gchar *pszPathSeparator = NULL;
GDALDatasetH hDataset;
GvSymbolObj *poSymbol;
CPLXMLNode *xml_shape = NULL;
GByte *rgba_buffer;
/* -------------------------------------------------------------------- */
/* Lookup the symbol in the hash table, and return it if found. */
/* -------------------------------------------------------------------- */
poSymbol = g_hash_table_lookup( manager->symbol_cache, symbol_name );
if( poSymbol != NULL )
return poSymbol;
/* -------------------------------------------------------------------- */
/* We didn't already have it, so try to find a file to load it */
/* from. */
/* -------------------------------------------------------------------- */
#ifndef WIN32
pszPathSeparator = "/";
#else
pszPathSeparator = "\\";
#endif /* WIN32 */
/* validate inputs */
g_return_val_if_fail( manager != NULL, 0 );
g_return_val_if_fail( symbol_name != NULL, 0 );
/* get an absolute path */
if ( !g_path_is_absolute( symbol_name ) )
{
/* check configuration option first */
pszSymbolsDir = g_strdup( gv_manager_get_preference( gv_get_manager(),
"symbols_dir" ) );
/* if not configured check $OPENEV_HOME */
if ( !pszSymbolsDir )
{
pszOpenEVHome = g_getenv( "OPENEV_HOME" );
if( pszOpenEVHome == NULL )
pszOpenEVHome = g_getenv( "OPENEVHOME" );
if ( pszOpenEVHome )
pszSymbolsDir = g_strjoin( pszPathSeparator, pszOpenEVHome,
"symbols", NULL );
}
/* get current directory as last resort */
if ( !pszSymbolsDir )
pszSymbolsDir = g_get_current_dir();
pszAbsolutePath = g_strjoin( pszPathSeparator, pszSymbolsDir,
symbol_name, NULL );
g_free( pszSymbolsDir );
}
else
pszAbsolutePath = g_strdup( symbol_name );
/* -------------------------------------------------------------------- */
/* pszAbsolutePath contains a newly allocated string that is */
/* suitable for using as a key in the hash table. If a texture */
/* is found in the hash table then this string needs to be */
/* freed. If one isn't found then the string is used in the */
/* hash table and should be freed when the associated hash */
/* table entry is released */
/* -------------------------------------------------------------------- */
CPLDebug( "OpenEV",
"gv_symbol_manager_get_symbol(%s) ... need to load.",
pszAbsolutePath );
/*
* validate path by opening with GDAL and looking for an error
* Disable CPL error handler to supress error reporting
*/
CPLErrorReset();
CPLPushErrorHandler( CPLQuietErrorHandler );
hDataset = GDALOpen( pszAbsolutePath, GA_ReadOnly );
CPLPopErrorHandler();
if ( hDataset )
{
rgba_buffer = gdal_to_rgba( hDataset );
if ( rgba_buffer )
{
gv_symbol_manager_inject_raster_symbol(
manager, symbol_name,
GDALGetRasterXSize( hDataset ),
GDALGetRasterYSize( hDataset ),
rgba_buffer );
CPLFree( rgba_buffer );
}
GDALClose( hDataset );
}
/* probably we have vector symbol? */
else if ( ( xml_shape = CPLParseXMLFile( pszAbsolutePath ) ) )
{
GvShape *shape;
shape = gv_shape_from_xml_tree( xml_shape );
CPLDestroyXMLNode( xml_shape );
if( shape != NULL )
gv_symbol_manager_inject_vector_symbol( manager, symbol_name,
shape );
else
{
CPLDebug( "OpenEV",
"Failed to instantiate GvSahpe from file %s, using simple point.",
pszAbsolutePath );
shape = gv_shape_new( GVSHAPE_POINT );
gv_symbol_manager_inject_vector_symbol( manager, symbol_name,
shape );
}
}
else
{
GvShape *shape;
CPLDebug( "OpenEV", "Failed to open file %s, using simple point.",
pszAbsolutePath );
shape = gv_shape_new( GVSHAPE_POINT );
gv_symbol_manager_inject_vector_symbol( manager, symbol_name,
shape );
}
/* look up in the hash table again */
poSymbol = g_hash_table_lookup(manager->symbol_cache, symbol_name );
g_free( pszAbsolutePath );
return poSymbol;
}