124 lines
4.2 KiB
C++
124 lines
4.2 KiB
C++
// Fl_Browser_.H
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// This is the base class for browsers. To be useful it must
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// be subclassed and several virtual functions defined. The
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// Forms-compatable browser and the file chooser's browser are
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// subclassed off of this.
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// Yes, I know this should be a template...
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#ifndef Fl_Browser__H
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#define Fl_Browser__H
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#ifndef Fl_Group_H
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#include "Fl_Group.H"
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#endif
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#include "Fl_Scrollbar.H"
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#define FL_NORMAL_BROWSER 0
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#define FL_SELECT_BROWSER 1
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#define FL_HOLD_BROWSER 2
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#define FL_MULTI_BROWSER 3
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class Fl_Browser_ : public Fl_Group {
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int position_; // where user wants it scrolled to
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int real_position_; // the current vertical scrolling position
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int hposition_; // where user wants it panned to
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int real_hposition_; // the current horizontal scrolling position
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int offset_; // how far down top_ item the real_position is
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int max_width; // widest object seen so far
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uchar textfont_, textsize_, textcolor_;
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uchar has_scrollbar_; // which scrollbars are enabled
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void* top_; // which item scrolling position is in
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void* selection_; // which is selected (except for FL_MULTI_BROWSER)
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void *redraw1,*redraw2; // minimal update pointers
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void* max_width_item; // which item has max_width_
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static int scrollbar_width_;
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void update_top();
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protected:
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// All of the following must be supplied by the subclass:
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virtual void *item_first() const = 0;
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virtual void *item_next(void *) const = 0;
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virtual void *item_prev(void *) const = 0;
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virtual int item_height(void *) const = 0;
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virtual int item_width(void *) const = 0;
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virtual int item_quick_height(void *) const ;
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virtual void item_draw(void *,int,int,int,int) const = 0;
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// you don't have to provide these but it may help speed it up:
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virtual int full_width() const ; // current width of all items
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virtual int full_height() const ; // current height of all items
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virtual int incr_height() const ; // average height of an item
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// These only need to be done by subclass if you want a multi-browser:
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virtual void item_select(void *,int=1);
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virtual int item_selected(void *) const ;
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// things the subclass may want to call:
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void *top() const {return top_;}
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void *selection() const {return selection_;}
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void new_list(); // completely clobber all data, as though list replaced
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void deleting(void *a); // get rid of any pointers to a
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void replacing(void *a,void *b); // change a pointers to b
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void inserting(void *a,void *b); // insert a before b
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int displayed(void *) const ; // true if this line is visible
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void redraw_line(void *); // minimal update, no change in size
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void redraw_lines() {damage(4);} // redraw all of them
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void bbox(int&,int&,int&,int&) const;
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int leftedge() const; // x position after scrollbar & border
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void *find_item(int my); // item under mouse
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void draw(int,int,int,int);
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int handle(int,int,int,int,int);
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void draw();
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int handle(int);
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Fl_Browser_(int,int,int,int,const char * = 0);
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public:
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Fl_Scrollbar scrollbar; // Vertical scrollbar
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Fl_Scrollbar hscrollbar; // Horizontal scrollbar
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void resize(int,int,int,int);
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int select(void *,int=1,int docallbacks=0);
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int select_only(void *,int docallbacks=0);
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int deselect(int docallbacks=0);
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int position() const {return position_;}
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int hposition() const {return hposition_;}
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void position(int); // scroll to here
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void hposition(int); // pan to here
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void display(void*); // scroll so this item is shown
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uchar has_scrollbar() const {return has_scrollbar_;}
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void has_scrollbar(uchar i) {has_scrollbar_ = i;}
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enum { // values for has_scrollbar()
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HORIZONTAL = 1,
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VERTICAL = 2,
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BOTH = 3,
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ALWAYS_ON = 4,
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HORIZONTAL_ALWAYS = 5,
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VERTICAL_ALWAYS = 6,
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BOTH_ALWAYS = 7
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};
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Fl_Font textfont() const {return (Fl_Font)textfont_;}
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void textfont(uchar s) {textfont_ = s;}
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uchar textsize() const {return textsize_;}
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void textsize(uchar s) {textsize_ = s;}
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Fl_Color textcolor() const {return (Fl_Color)textcolor_;}
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void textcolor(uchar n) {textcolor_ = n;}
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static void scrollbar_width(int b) {scrollbar_width_ = b;}
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static int scrollbar_width() {return scrollbar_width_;}
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// for back compatability:
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void scrollbar_right() {scrollbar.align(FL_ALIGN_RIGHT);}
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void scrollbar_left() {scrollbar.align(FL_ALIGN_LEFT);}
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};
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#endif
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