add link class - that provides the link storage and drawing

git-svn-id: http://svn.php.net/repository/pear/packages/Gtk_MDB_Designer/trunk@121487 c90b9560-bf6c-de11-be94-00142212c4b1

Designer/Interface/Link.php

@@ -0,0 +1,165 @@
+<?php
+/* vim: set expandtab tabstop=4 shiftwidth=4: */
+// +----------------------------------------------------------------------+
+// | PHP Version 4                                                        |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1997-2002 The PHP Group                                |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 2.02 of the PHP license,      |
+// | that is bundled with this package in the file LICENSE, and is        |
+// | available at through the world-wide-web at                           |
+// | http://www.php.net/license/2_02.txt.                                 |
+// | If you did not receive a copy of the PHP license and are unable to   |
+// | obtain it through the world-wide-web, please send a note to          |
+// | license@php.net so we can mail you a copy immediately.               |
+// +----------------------------------------------------------------------+
+// | Authors:  Alan Knowles <alan@akbkhome.com>                           |
+// +----------------------------------------------------------------------+
+//
+// 
+//
+//  The Gtk part of the linking..
+//
+
+$GLOBALS['_Gtk_MDB_Designer_Interface_Link'] = array();
+
+
+class Gtk_MDB_Designer_Interface_Link {
+
+    var $from; // Gtk_MDB_Designer_Interface_Column
+    var $to;   // Gtk_MDB_Designer_Interface_Column
+
+
+
+
+
+
+    function matches(&$array) {
+        if ($this->from->table->name != $array[0]->table->name) {
+            return;
+        }
+        if ($this->to->table->name != $array[1]->table->name) {
+            return;
+        }
+        if ($this->from->name != $array[0]->name) {
+            return;
+        }
+        if ($this->to->name != $array[1]->name) {
+            return;
+        }
+        return true;
+    }
+    var $fromPos;
+    var $toPos;
+
+    function drawLink() {
+        // ask first for startpos
+        // make up firstpos
+        //require_once 'Gtk/VarDump.php';new Gtk_VarDump($this);
+        $this->setGC();
+
+        $base = array($this->from->table->x,$this->from->table->y);
+        $toPos = $this->to->getStartPos($base);
+        $this->fromPos = $this->from->getStartPos($toPos);
+        $this->toPos = $this->to->getStartPos($this->fromPos);
+        $this->drawDragLine($GLOBALS['_Gtk_MDB_Designer_Interface_Link']['gc']);
+
+
+
+    }
+
+
+
+    // refactor later? - move these to a shared location for column and links
+
+    function setGC() {
+        if (isset($GLOBALS['_Gtk_MDB_Designer_Interface_Link']['gc'])) {
+            return;
+        }
+        //require_once 'Gtk/VarDump.php';new Gtk_VarDump($this);
+        $database = &$this->from->table->database;
+        $w = $database->layout->window; 
+        $cmap = $database->layout->get_colormap();
+
+        $GLOBALS['_Gtk_MDB_Designer_Interface_Link']['gc'] = $w->new_gc();
+
+        $gc = &$GLOBALS['_Gtk_MDB_Designer_Interface_Link']['gc'];
+        $gc->background =  $cmap->alloc("#000000");
+        $gc->foreground =  $cmap->alloc("#FF0000");
+        //$gc->function   =  GDK_INVERT;
+        $gc->line_width  =  3;
+        $gc->line_style = GDK_LINE_ON_OFF_DASH;
+        $gc->cap_style = GDK_CAP_ROUND;
+
+
+    }
+
+
+    // similar to the one in column.
+
+    function drawDragLine(&$gc) {
+        list($x1,$y1) = $this->fromPos;
+        list($x2,$y2) = $this->toPos;
+        $database = &$this->from->table->database;
+
+        //echo "DRAW LINE\n";
+        $layout = &$database->layout;
+        $xAdj = $layout->get_hadjustment();
+        $yAdj = $layout->get_vadjustment();
+        $da =  &$database->designer->drawingArea;
+        $xf = -5;
+        if ($x1 > $x2) {
+            $xf = 5;
+        }
+
+        $pix = &$database->designer->pixmap;
+        gdk::draw_line($pix,  $gc    ,
+            $x1 + $xAdj->value, $y1 + $yAdj->value,
+            $x2 + $xAdj->value+$xf, $y2 + $yAdj->value );
+
+        $da->draw($this->makeRectangle(
+               $x1 + $xAdj->value, $y1 + $yAdj->value,
+               $x2 + $xAdj->value,  $y2 + $yAdj->value )
+        );
+
+        $x = $x2 + $xAdj->value;
+        $y = $y2 + $yAdj->value; 
+
+        $xf = -5;
+        $s = "<";
+        if ($x2 < $this->to->table->x) {
+            $xf = -5;
+            $s = ">";
+        }
+
+        // this needs to be tagged onto the column so 
+        // that multiple links can be associated with one column.
+
+        $button = &new GtkButton($s);
+        $button->show();
+        $layout->put($button,$x+$xf,$y-10);
+
+
+
+
+
+
+
+    }    
+    function &makeRectangle($x1,$y1,$x2,$y2) {
+        //print_r(array($x1,$y1,$x2,$y2));
+        if ($x2 < $x1) {
+            $x = $x1;
+            $x1 = $x2;
+            $x2 = $x;
+        }
+        if ($y2 < $y1) {
+            $y = $y1;
+            $y1 = $y2;
+            $y2 = $y;
+        }
+        //print_r(array($x1,$y1,$x2,$y2));
+        return new GdkRectangle($x1,$y1,$x2,$y2);
+    }
+}
+?>