Add a Builder for BALMLayout.

2012-05-03 08:44:23 +12:00
parent b50d4ed8bd
commit 50cc24b3f9
3 changed files with 476 additions and 0 deletions
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2012, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef	ALM_LAYOUT_BUILDER_H
+#define	ALM_LAYOUT_BUILDER_H
+
+
+#include "ALMLayout.h"
+
+
+class BWindow;
+
+
+namespace BALM {
+
+
+class BALMLayoutBuilder {
+public:
+								BALMLayoutBuilder(BView* view, float hSpacing,
+									float vSpacing,
+									BALMLayout* friendLayout = NULL);
+								BALMLayoutBuilder(BView* view,
+									BALMLayout* layout);
+								BALMLayoutBuilder(BWindow* window,
+									float hSpacing, float vSpacing,
+									BALMLayout* friendLayout = NULL);
+								BALMLayoutBuilder(BWindow* window,
+									BALMLayout* layout);
+								BALMLayoutBuilder(BALMLayout* layout);
+
+	BALMLayoutBuilder&			Add(BView* view, XTab* left, YTab* top,
+									XTab* right = NULL, YTab* bottom = NULL);
+	BALMLayoutBuilder&			Add(BView* view, Row* row, Column* column);
+
+	BALMLayoutBuilder&			Add(BLayoutItem* item, XTab* left,
+									YTab* top, XTab* right = NULL,
+									YTab* bottom = NULL);
+	BALMLayoutBuilder&			Add(BLayoutItem* item, Row* row,
+									Column* column);
+
+	BALMLayoutBuilder&			SetInsets(float insets);
+	BALMLayoutBuilder&			SetInsets(float horizontal, float vertical);
+	BALMLayoutBuilder&			SetInsets(float left, float top, float right,
+									float bottom);
+
+	BALMLayoutBuilder&			SetSpacing(float horizontal, float vertical);
+									
+	struct Snake;
+
+	// context setters
+	Snake	StartingAt(BView* view);
+	Snake	StartingAt(BLayoutItem* item);
+
+	struct Snake {
+		BALMLayoutBuilder::Snake& AddToLeft(BView* view,
+									XTab* left = NULL, YTab* top = NULL,
+									YTab* bottom = NULL);
+		BALMLayoutBuilder::Snake& AddToRight(BView* view,
+									XTab* right = NULL, YTab* top = NULL,
+									YTab* bottom = NULL);
+		BALMLayoutBuilder::Snake& AddAbove(BView* view,
+									YTab* top = NULL, XTab* left = NULL,
+									XTab* right = NULL);
+		BALMLayoutBuilder::Snake& AddBelow(BView* view, YTab* bottom = NULL,
+									XTab* left = NULL, XTab* right = NULL);
+
+		BALMLayoutBuilder::Snake& AddToLeft(BLayoutItem* item,
+									XTab* left = NULL, YTab* top = NULL,
+									YTab* bottom = NULL);
+		BALMLayoutBuilder::Snake& AddToRight(BLayoutItem* item,
+									XTab* right = NULL, YTab* top = NULL,
+									YTab* bottom = NULL);
+		BALMLayoutBuilder::Snake& AddAbove(BLayoutItem* item,
+									YTab* top = NULL, XTab* left = NULL,
+									XTab* right = NULL);
+		BALMLayoutBuilder::Snake& AddBelow(BLayoutItem* item,
+									YTab* bottom = NULL, XTab* left = NULL,
+									XTab* right = NULL);
+
+
+		// these methods throw away the stack
+		Snake						StartingAt(BView* view);
+		Snake						StartingAt(BLayoutItem* item);
+
+		Snake					Push();
+		Snake&					Pop();
+
+		BALMLayoutBuilder&		End();
+
+	private:
+		friend class BALMLayoutBuilder;
+
+								Snake(Area* area, BALMLayoutBuilder* root);
+								Snake(Area* area, Snake* previous);
+
+		BALMLayout*				_Layout();
+		Area*					_AddToLayout(BView* view, XTab* left, YTab* top,
+									XTab* right, YTab* bottom);
+		Area*					_AddToLayout(BLayoutItem* item, XTab* left,
+									YTab* top, XTab* right, YTab* bottom);
+
+		BALMLayoutBuilder*		fRootBuilder;
+		Snake*					fPreviousSnake;
+		Area*					fCurrentArea;
+	};
+
+
+private:
+	friend struct Snake;
+
+		BALMLayout*				fLayout;
+};
+
+
+};
+
+
+#endif