mirror of https://github.com/fltk/fltk
Various Fl_Tree enhancements:
o Added keyboard navigation table o Added Shift-Click to extend selection, Ctrl-Space to toggle selection, Enter key toggle o Added protected extend_selection(from_item,to_item) o Cleanup of Fl_Tree::handle() o Limit ^A to multi-select mode only o Disable focus box in SELECT_NONE mode o test/tree: changed default mode to 'multiselect' (most often needs testing) git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9385 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
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FL/Fl_Tree.H
73
FL/Fl_Tree.H
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@ -179,6 +179,78 @@
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/// \image html tree-elements.png
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/// \image latex tree-elements.png "Fl_Tree dimensions" width=6cm
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///
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/// The following table lists keyboard bindings for navigating the tree:
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///
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/// <TABLE BORDER="1" SUMMARY="Fl_Tree keyboard bindings.">
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/// <CAPTION ALIGN=TOP>Fl_Tree keyboard bindings.</CAPTION>
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/// <TR>
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/// <TD WIDTH=25% ALIGN=CENTER><B>Keyboard</B></TD>
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/// <TD WIDTH=25% ALIGN=CENTER><B>FL_TREE_SELECT_MULTI</B></TD>
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/// <TD WIDTH=25% ALIGN=CENTER><B>FL_TREE_SELECT_SINGLE</B></TD>
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/// <TD WIDTH=25% ALIGN=CENTER><B>FL_TREE_SELECT_NONE</B></TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Ctrl-A</B> (Linux/Windows)<BR><B>Command-A</B> (Mac)</TD>
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/// <TD ALIGN=CENTER>Select all items.</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Space </B></TD>
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/// <TD ALIGN=CENTER>Selects item.</TD>
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/// <TD ALIGN=CENTER>Selects item.</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Ctrl-Space </B></TD>
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/// <TD ALIGN=CENTER>Toggle item.</TD>
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/// <TD ALIGN=CENTER>Toggle item.</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Shift-Space </B></TD>
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/// <TD ALIGN=CENTER>Extends selection<BR>from last item.</TD>
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/// <TD ALIGN=CENTER>Selects item.</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Enter,<BR>Ctrl-Enter,<BR>Shift-Enter </B></TD>
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/// <TD ALIGN=CENTER>Toggles open/close</TD>
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/// <TD ALIGN=CENTER>Toggles open/close</TD>
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/// <TD ALIGN=CENTER>Toggles open/close</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Right / Left</B></TD>
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/// <TD ALIGN=CENTER>Open/Close item.</TD>
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/// <TD ALIGN=CENTER>Open/Close item.</TD>
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/// <TD ALIGN=CENTER>Open/Close item.</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Up / Down</B></TD>
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/// <TD ALIGN=CENTER>Move focus box up/down.</TD>
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/// <TD ALIGN=CENTER>Move focus box up/down.</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Shift-Up / Shift-Down</B></TD>
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/// <TD ALIGN=CENTER>Extend selection up/down.</TD>
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/// <TD ALIGN=CENTER>Move focus up/down.</TD>
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/// <TD ALIGN=CENTER>N/A</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>Home / End</B></TD>
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/// <TD ALIGN=CENTER>Move to top/bottom of tree.</TD>
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/// <TD ALIGN=CENTER>Move to top/bottom of tree.</TD>
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/// <TD ALIGN=CENTER>Move to top/bottom of tree.</TD>
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///
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/// </TR><TR>
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/// <TD ALIGN=CENTER><B>PageUp / PageDown</B></TD>
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/// <TD ALIGN=CENTER>Page up/down.</TD>
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/// <TD ALIGN=CENTER>Page up/down.</TD>
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/// <TD ALIGN=CENTER>Page up/down.</TD>
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///
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/// </TD></TR></TABLE>
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///
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/// \enum Fl_Tree_Reason
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/// The reason the callback was invoked.
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@ -216,6 +288,7 @@ protected:
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void item_clicked(Fl_Tree_Item* val);
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void do_callback_for_item(Fl_Tree_Item* item, Fl_Tree_Reason reason);
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Fl_Tree_Item *next_visible_item(Fl_Tree_Item *start, int dir);
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void extend_selection(Fl_Tree_Item *from, Fl_Tree_Item *to);
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public:
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Fl_Tree(int X, int Y, int W, int H, const char *L=0);
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171
src/Fl_Tree.cxx
171
src/Fl_Tree.cxx
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@ -122,10 +122,38 @@ Fl_Tree::~Fl_Tree() {
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if ( _root ) { delete _root; _root = 0; }
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}
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/// Extend a selection between 'from' and 'to'.
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/// Used by SHIFT-click to extend a selection between two items inclusive.
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///
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void Fl_Tree::extend_selection(Fl_Tree_Item *from, Fl_Tree_Item *to) {
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char on = 0;
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if ( from == to ) {
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from->select();
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return;
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}
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for ( Fl_Tree_Item *item = first(); item; item = next(item) ) {
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if ( (item == from) || (item == to) ) {
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item->select(); // inclusive
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on ^= 1;
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} else if ( on ) {
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item->select();
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}
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}
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}
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/// Standard FLTK event handler for this widget.
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int Fl_Tree::handle(int e) {
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if (e == FL_NO_EVENT) return(0); // XXX: optimize to prevent slow resizes on large trees!
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int ret = 0;
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char is_shift = Fl::event_state() & FL_SHIFT ? 1 : 0;
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char is_ctrl = Fl::event_state() & FL_CTRL ? 1 : 0;
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char is_command = Fl::event_state() & FL_COMMAND ? 1 : 0; // ctrl on win/lin, 'Command' on mac
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#if FLTK_ABI_VERSION >= 10302
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// NEW: data inside Fl_Tree
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#else
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// OLD:
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static Fl_Tree_Item *_lastselect = 0;
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#endif
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// Developer note: Fl_Browser_::handle() used for reference here..
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// #include <FL/names.h> // for event debugging
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// fprintf(stderr, "DEBUG: %s (%d)\n", fl_eventnames[e], e);
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@ -139,11 +167,8 @@ int Fl_Tree::handle(int e) {
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if ( ! _item_focus ) { // no focus established yet?
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switch (Fl::event_key()) { // determine if focus was navigated..
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case FL_Tab: { // received focus via TAB?
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if ( Fl::event_state(FL_SHIFT) ) { // SHIFT-TAB similar to FL_Up
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set_item_focus(next_visible_item(0, FL_Up));
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} else { // TAB similar to FL_Down
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set_item_focus(next_visible_item(0, FL_Down));
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}
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int updown = is_shift ? FL_Up : FL_Down; // SHIFT-TAB similar to Up, TAB similar to Down
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set_item_focus(next_visible_item(0, updown));
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break;
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}
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case FL_Left: // received focus via LEFT or UP?
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@ -175,31 +200,39 @@ int Fl_Tree::handle(int e) {
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if ( _item_focus ) {
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int ekey = Fl::event_key();
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switch (ekey) {
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case FL_Enter: // ENTER: selects current item only
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case FL_KP_Enter:
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if ( when() & ~FL_WHEN_ENTER_KEY) {
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select_only(_item_focus, when());
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show_item(_item_focus); // STR #2426
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return(1);
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}
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case FL_Enter: // ENTER: toggle open/close
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case FL_KP_Enter: {
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open_toggle(_item_focus, when());
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break;
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case ' ': // toggle selection state
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}
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case ' ': // SPACE: change selection state
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switch ( _prefs.selectmode() ) {
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case FL_TREE_SELECT_NONE:
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break;
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case FL_TREE_SELECT_SINGLE:
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if ( ! _item_focus->is_selected() ) // not selected?
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select_only(_item_focus, when()); // select only this
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else
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deselect_all(0, when()); // select nothing
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break;
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if ( is_ctrl ) { // CTRL-SPACE: (single mode) toggle
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if ( ! _item_focus->is_selected() ) {
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select_only(_item_focus, when());
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} else {
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deselect_all(0, when());
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}
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} else {
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select_only(_item_focus, when()); // SPACE: (single mode) select only
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}
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_lastselect = _item_focus;
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return(1);
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case FL_TREE_SELECT_MULTI:
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select_toggle(_item_focus, when());
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break;
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if ( is_ctrl ) {
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select_toggle(_item_focus, when()); // CTRL-SPACE: (multi mode) toggle selection
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} else {
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select(_item_focus, when()); // SPACE: (multi-mode) select
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}
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_lastselect = _item_focus;
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return(1);
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}
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break;
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case FL_Right: // open children (if any)
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case FL_Left: { // close children (if any)
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case FL_Right: // RIGHT: open children (if any)
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case FL_Left: { // LEFT: close children (if any)
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if ( _item_focus ) {
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if ( ekey == FL_Right && _item_focus->is_close() ) {
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// Open closed item
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}
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break;
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}
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case FL_Up: // next item up
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case FL_Down: { // next item down
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case FL_Up: // UP: next item up, or extend selection up
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case FL_Down: { // DOWN: next item down, or extend selection down
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set_item_focus(next_visible_item(_item_focus, ekey)); // next item up|dn
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if ( _item_focus ) { // item in focus?
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// Autoscroll
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if ( itembot > y()+h() ) { show_item_bottom(_item_focus); }
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// Extend selection
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if ( _prefs.selectmode() == FL_TREE_SELECT_MULTI && // multiselect on?
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(Fl::event_state() & FL_SHIFT) && // shift key?
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is_shift && // shift key?
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! _item_focus->is_selected() ) { // not already selected?
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select(_item_focus, when()); // extend selection..
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_lastselect = _item_focus;
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}
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return(1);
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}
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@ -237,10 +271,18 @@ int Fl_Tree::handle(int e) {
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}
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case 'a':
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case 'A': {
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if ( Fl::event_state() & FL_CTRL ) {
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select_all();
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take_focus();
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return(1);
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if ( is_command ) { // ^A (win/linux), Meta-A (mac)
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switch ( _prefs.selectmode() ) {
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case FL_TREE_SELECT_NONE:
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case FL_TREE_SELECT_SINGLE:
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break;
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case FL_TREE_SELECT_MULTI:
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// Do a 'select all'
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select_all();
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_lastselect = first();
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take_focus();
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return(1);
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}
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}
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break;
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}
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// Handle events the child FLTK widgets didn't need
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#if FLTK_ABI_VERSION >= 10302
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// NEW: data inside Fl_Tree
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#else
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// OLD:
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static Fl_Tree_Item *_lastselect = 0;
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#endif
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// fprintf(stderr, "ERCODEBUG: Fl_Tree::handle(): Event was %s (%d)\n", fl_eventnames[e], e); // DEBUGGING
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// fprintf(stderr, "Fl_Tree::handle(): Event was %s (%d)\n", fl_eventnames[e], e); // DEBUGGING
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if ( ! _root ) return(ret);
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switch ( e ) {
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case FL_PUSH: { // clicked on tree
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if (Fl::visible_focus() && handle(FL_FOCUS)) {
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Fl::focus(this);
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}
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_lastselect = 0;
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Fl_Tree_Item *o = _root->find_clicked(_prefs);
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if ( !o ) { // clicked, but not on an item?
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// Not extending a selection? zero lastselect
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Fl_Tree_Item *item = _root->find_clicked(_prefs);
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if ( !item ) { // clicked, but not on an item?
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switch ( _prefs.selectmode() ) {
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case FL_TREE_SELECT_NONE:
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break;
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@ -284,31 +320,35 @@ int Fl_Tree::handle(int e) {
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}
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break;
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}
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set_item_focus(o); // becomes new focus widget
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set_item_focus(item); // becomes new focus widget
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redraw();
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ret |= 1; // handled
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if ( Fl::event_button() == FL_LEFT_MOUSE ) {
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if ( o->event_on_collapse_icon(_prefs) ) { // collapse icon clicked?
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open_toggle(o);
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} else if ( o->event_on_label(_prefs) && // label clicked?
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(!o->widget() || !Fl::event_inside(o->widget())) && // not inside widget
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if ( item->event_on_collapse_icon(_prefs) ) { // collapse icon clicked?
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open_toggle(item);
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} else if ( item->event_on_label(_prefs) && // label clicked?
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(!item->widget() || !Fl::event_inside(item->widget())) && // not inside widget
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(!_vscroll->visible() || !Fl::event_inside(_vscroll)) ) { // not on scroller
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switch ( _prefs.selectmode() ) {
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case FL_TREE_SELECT_NONE:
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break;
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case FL_TREE_SELECT_SINGLE:
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select_only(o, when());
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select_only(item, when());
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_lastselect = item;
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break;
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case FL_TREE_SELECT_MULTI: {
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if ( Fl::event_state() & FL_SHIFT ) { // SHIFT+PUSH?
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select(o); // add to selection
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} else if ( Fl::event_state() & FL_CTRL ) { // CTRL+PUSH?
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select_toggle(o, when()); // toggle selection state
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_lastselect = o; // save toggled item (prevent oscillation)
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if ( is_shift ) { // SHIFT+PUSH?
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if ( _lastselect ) {
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extend_selection(_lastselect, item);
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} else {
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select(item); // add to selection
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}
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} else if ( is_ctrl ) { // CTRL+PUSH?
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select_toggle(item, when()); // toggle selection state
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} else {
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select_only(o, when());
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select_only(item, when());
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}
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_lastselect = item;
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break;
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}
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}
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vposition(p);
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}
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if ( Fl::event_button() != FL_LEFT_MOUSE ) break;
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Fl_Tree_Item *o = _root->find_clicked(_prefs);
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if ( ! o ) break;
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set_item_focus(o); // becomes new focus widget
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Fl_Tree_Item *item = _root->find_clicked(_prefs);
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if ( ! item ) break;
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set_item_focus(item); // becomes new focus widget
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redraw();
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ret |= 1;
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// Item's label clicked?
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if ( o->event_on_label(_prefs) &&
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(!o->widget() || !Fl::event_inside(o->widget())) &&
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if ( item->event_on_label(_prefs) &&
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(!item->widget() || !Fl::event_inside(item->widget())) &&
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(!_vscroll->visible() || !Fl::event_inside(_vscroll)) ) {
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// Handle selection behavior
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switch ( _prefs.selectmode() ) {
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case FL_TREE_SELECT_NONE: break; // no selection changes
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case FL_TREE_SELECT_NONE:
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break; // no selection changes
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case FL_TREE_SELECT_SINGLE:
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select_only(o, when());
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select_only(item, when());
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_lastselect = item;
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break;
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case FL_TREE_SELECT_MULTI:
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if ( Fl::event_state() & FL_CTRL && // CTRL-DRAG: toggle?
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_lastselect != o ) { // not already toggled from last microdrag?
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select_toggle(o, when()); // toggle selection
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_lastselect = o; // save we toggled it (prevents oscillation)
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if ( is_ctrl ) { // CTRL-DRAG: toggle?
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if ( _lastselect != item ) { // not already toggled from last microdrag?
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select_toggle(item, when()); // toggle selection
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}
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} else {
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select(o); // select this
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select(item); // select this
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}
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_lastselect = item;
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break;
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}
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}
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@ -733,7 +733,10 @@ void Fl_Tree_Item::draw(int X, int &Y, int W, Fl_Widget *tree,
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widget()->draw();
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}
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// Draw focus box around item's bg last
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if ( this == itemfocus && Fl::visible_focus() && Fl::focus() == tree) {
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if ( this == itemfocus &&
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Fl::visible_focus() &&
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Fl::focus() == tree &&
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prefs.selectmode() != FL_TREE_SELECT_NONE ) {
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draw_item_focus(FL_NO_BOX,bg,bg_x+1,bg_y+1,bg_w-1,bg_h-1);
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}
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} // end drawthis
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12
test/tree.fl
12
test/tree.fl
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@ -473,7 +473,7 @@ switch ( collapseicons_chooser->value() ) {
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case 2:
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tree->showcollapse(0);
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break;
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}} selected
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}}
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tooltip {Tests Fl_Tree::openicon() and Fl_Tree::closeicon()} xywh {485 201 140 21} down_box BORDER_BOX labelsize 12 textsize 11
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} {
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MenuItem {} {
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@ -496,7 +496,7 @@ switch ( connectorstyle_chooser->value() ) {
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case 0: tree->connectorstyle(FL_TREE_CONNECTOR_NONE); break;
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case 1: tree->connectorstyle(FL_TREE_CONNECTOR_DOTTED); break;
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case 2: tree->connectorstyle(FL_TREE_CONNECTOR_SOLID); break;
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}} selected
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}}
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tooltip {Tests connectorstyle() bit flags} xywh {485 225 140 21} down_box BORDER_BOX labelsize 12 textsize 11
|
||||
code0 {switch (tree->connectorstyle()) { case FL_TREE_CONNECTOR_NONE: connectorstyle_chooser->value(0); break; case FL_TREE_CONNECTOR_DOTTED: connectorstyle_chooser->value(1); break; case FL_TREE_CONNECTOR_SOLID: connectorstyle_chooser->value(2); break; }}
|
||||
} {
|
||||
|
@ -523,7 +523,7 @@ switch ( selectmode_chooser->value() ) {
|
|||
default: tree->selectmode(FL_TREE_SELECT_SINGLE); break; // Single
|
||||
}} selected
|
||||
tooltip {Sets how Fl_Tree handles mouse selection of tree items} xywh {485 249 140 21} down_box BORDER_BOX labelsize 12 textsize 11
|
||||
code0 {selectmode_chooser->value(1);}
|
||||
code0 {selectmode_chooser->value(2);}
|
||||
code1 {cb_selectmode_chooser(selectmode_chooser, (void*)0);}
|
||||
} {
|
||||
MenuItem {} {
|
||||
|
@ -555,7 +555,7 @@ reselectmode_chooser->tooltip("DISABLED.\\n"
|
|||
"Set FLTK_ABI_VERSION to 10302 (or higher)\\n"
|
||||
"to get this feature");
|
||||
window->redraw(); // deactivated
|
||||
\#endif} selected
|
||||
\#endif}
|
||||
tooltip {Enable 'reselect' events
|
||||
These happen when mouse drags or multi-clicks an item} xywh {485 273 140 21} down_box BORDER_BOX labelsize 12 textsize 11
|
||||
code0 {reselectmode_chooser->value(1);}
|
||||
|
@ -586,7 +586,7 @@ itemdrawmode_chooser->tooltip("DISABLED.\\n"
|
|||
"Set FLTK_ABI_VERSION to 10302 (or higher)\\n"
|
||||
"to get this feature");
|
||||
window->redraw(); // deactivated
|
||||
\#endif} selected
|
||||
\#endif}
|
||||
tooltip {Sets how Fl_Tree draws item label and widget()} xywh {485 297 140 21} down_box BORDER_BOX labelsize 12 textsize 11
|
||||
code0 {itemdrawmode_chooser->value(0);}
|
||||
code1 {itemdrawmode_chooser->do_callback();}
|
||||
|
@ -608,7 +608,7 @@ switch ( whenmode_chooser->value() ) {
|
|||
case 1: tree->when(FL_WHEN_CHANGED); break;
|
||||
case 2: tree->when(FL_WHEN_NEVER); break;
|
||||
default: tree->when(FL_WHEN_RELEASE); break;
|
||||
}} selected
|
||||
}}
|
||||
tooltip {Sets when() the tree's callback is invoked} xywh {485 321 140 21} down_box BORDER_BOX labelsize 12 textsize 11
|
||||
code0 {whenmode_chooser->value(1);}
|
||||
code1 {cb_whenmode_chooser(whenmode_chooser, (void*)0);}
|
||||
|
|
Loading…
Reference in New Issue