// A few presets, plus "Custom" to control other parameters // // Starting hue (0..1) for graph // // Delta hue for graph (+ or -) // // Time to grow graph, back to front // // Time to hold completed graph // // If present, draw 2-D graph // // transparency of graph (0..1) function project_specific_prefs_default() { return "Tahiti Sunset\n"; } function option($name, $val) { if ($name == $val) { $x = "selected"; } else { $x = ""; } echo "$name\n"; } // given struct, show form for editing // function project_specific_prefs_edit($prefs) { $x = $prefs->color_scheme; echo " Graphics preferences:
Select Custom to edit individual parameters "; option("Tahiti Sunset", $x); option("Desert Sands", $x); option("Underwater", $x); option("Custom", $x); echo "\n"; if ($prefs->color_scheme == "Custom") { $sel2 = ($prefs->two_dim?"checked":""); $sel3 = ($prefs->two_dim?"":"checked"); echo " Start hue Hue change Grow time Hold time Graph dimension 2-D 3-D Graph transparency "; } } // Return XML version of project-specific prefs from form vars // function project_specific_prefs_parse_form() { $color_scheme = $_GET["color_scheme"]; $start_hue = $_GET["start_hue"]; $hue_change = $_GET["hue_change"]; $grow_time = $_GET["grow_time"]; $hold_time = $_GET["hold_time"]; $graph_alpha = $_GET["graph_alpa"]; $two_dim = $_GET["two_dim"]; switch( $color_scheme ) { case "Tahiti Sunset": $start_hue = 0.5; $hue_change = 0.5; $grow_time = 10; $hold_time = 5; $graph_alpha = 0.7; $two_dim = "no"; break; case "Desert Sands": $start_hue = 0.0; $hue_change = 0.2; $grow_time = 10; $hold_time = 5; $graph_alpha = 0.7; $two_dim = "no"; break; case "Underwater": $start_hue = 0.2; $hue_change = 0.4; $grow_time = 10; $hold_time = 5; $graph_alpha = 0.7; $two_dim = "no"; break; case "Custom": if ($start_hue == null) $start_hue = 0; if ($hue_change == null) $hue_change = 1; if ($grow_time == null) $grow_time = 10; if ($hold_time == null) $hold_time = 5; if ($graph_alpha == null) $graph_alpha = 0.7; if ($two_dim == null) $two_dim = "no"; break; } $x = "$color_scheme $start_hue $hue_change $grow_time $hold_time $graph_alpha "; if ($two_dim == "yes") $x = $x."\n"; return $x; } // show non-editable version of prefs // function project_specific_prefs_show($prefs) { row2("Color scheme", $prefs->color_scheme); if ($prefs->color_scheme == "Custom") { $dim = $prefs->two_dim?"2":"3"; row2("Start hue", $prefs->start_hue); row2("Hue change", $prefs->hue_change); row2("Grow time", $prefs->grow_time); row2("Hold time", $prefs->hold_time); row2("Graph alpha", $prefs->graph_alpha); row2("Graph dimension", $dim); } } // parse XML, fill in struct // function project_specific_prefs_parse($prefs_xml) { $prefs->color_scheme = parse_element($prefs_xml, ""); $prefs->start_hue = parse_element($prefs_xml, ""); $prefs->hue_change = parse_element($prefs_xml, ""); $prefs->grow_time = parse_element($prefs_xml, ""); $prefs->hold_time = parse_element($prefs_xml, ""); $prefs->graph_alpha = parse_element($prefs_xml, ""); $prefs->two_dim = parse_element($prefs_xml, ""); return $prefs; }