lldraghandle.h

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// A widget for dragging a view around the screen using the mouse.

#ifndef LL_DRAGHANDLE_H
#define LL_DRAGHANDLE_H

#include "llview.h"
#include "v4color.h"
#include "llrect.h"
#include "llcoord.h"

class LLTextBox;

class LLDragHandle : public LLView
{
public:
        LLDragHandle(const LLString& name, const LLRect& rect, const LLString& title );
        virtual ~LLDragHandle() { setTitleBox(NULL); }

        virtual void setValue(const LLSD& value);

        void                    setForeground(BOOL b)           { mForeground = b; }
        BOOL                    getForeground() const           { return mForeground; }
        void                    setMaxTitleWidth(S32 max_width) {mMaxTitleWidth = llmin(max_width, mMaxTitleWidth); }
        S32                             getMaxTitleWidth() const { return mMaxTitleWidth; }
        void                    setTitleVisible(BOOL visible);

        virtual void    setTitle( const LLString& title ) = 0;
        virtual const LLString& getTitle() const = 0;

        virtual BOOL    handleHover(S32 x, S32 y, MASK mask);
        virtual BOOL    handleMouseDown(S32 x, S32 y, MASK mask);
        virtual BOOL    handleMouseUp(S32 x, S32 y, MASK mask);

protected:
        LLTextBox*              getTitleBox() const { return mTitleBox; }
        void                    setTitleBox(LLTextBox*);

private:
        S32                             mDragLastScreenX;
        S32                             mDragLastScreenY;
        S32                             mLastMouseScreenX;
        S32                             mLastMouseScreenY;
        LLCoordGL               mLastMouseDir;
        LLColor4                mDragHighlightColor;
        LLColor4                mDragShadowColor;
        LLTextBox*              mTitleBox;
        S32                             mMaxTitleWidth;
        BOOL                    mForeground;

        // Pixels near the edge to snap floaters.
        static S32              sSnapMargin;
};


// Use this one for traditional top-of-window draggers
class LLDragHandleTop
: public LLDragHandle
{
public:
        LLDragHandleTop(const LLString& name, const LLRect& rect, const LLString& title );

        virtual void    setTitle( const LLString& title );
        virtual const LLString& getTitle() const;
        virtual void    draw();
        virtual void    reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);

private:
        void    reshapeTitleBox();
};


// Use this for left-side, vertical text draggers
class LLDragHandleLeft
: public LLDragHandle
{
public:
        LLDragHandleLeft(const LLString& name, const LLRect& rect, const LLString& title );

        virtual void    setTitle( const LLString& title );
        virtual const LLString& getTitle() const;
        virtual void    draw();
        virtual void    reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);

};

const S32 DRAG_HANDLE_HEIGHT = 16;
const S32 DRAG_HANDLE_WIDTH = 16;

#endif  // LL_DRAGHANDLE_H

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