57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
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#ifndef __LAYOUT_HXX
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#define __LAYOUT_HXX
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class SGPropertyNode;
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class puFont;
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// For the purposes of doing layout management, widgets have a type,
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// zero or more children, and string-indexed "fields" which can be
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// constraints, parameters or x/y/width/height geometry values. It
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// can provide a "preferred" width and height to its parent, and is
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// capable of laying itself out into a specified x/y/w/h box. The
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// widget "type" is not a field for historical reasons having to do
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// with the way the dialog property format works.
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//
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// Note that this is a simple wrapper around an SGPropertyNode
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// pointer. The intent is that these objects will be created on the
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// stack as needed and passed by value. All persistent data is stored
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// in the wrapped properties.
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class LayoutWidget {
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public:
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static void setDefaultFont(puFont* font, int pixels);
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LayoutWidget() { _prop = 0; }
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LayoutWidget(SGPropertyNode* p) { _prop = p; }
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const char* type();
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bool hasParent();
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LayoutWidget parent();
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int nChildren();
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LayoutWidget getChild(int i);
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bool hasField(const char* f);
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int getNum(const char* f);
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bool getBool(const char* f);
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const char* getStr(const char* f);
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void setNum(const char* f, int num);
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void calcPrefSize(int* w, int* h);
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void layout(int x, int y, int w, int h);
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private:
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static int UNIT;
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static puFont FONT;
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static bool eq(const char* a, const char* b);
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bool isType(const char* t) { return eq(t, type()); }
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int padding();
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int stringLength(const char* s); // must handle null argument
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void doHVBox(bool doLayout, bool vertical, int* w=0, int* h=0);
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void doTable(bool doLayout, int* w=0, int* h=0);
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SGPropertyNode* _prop;
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};
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#endif // __LAYOUT_HXX
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