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| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Strict//EN"> | ||
| <html> | ||
| <head> | ||
| <meta http-equiv="Content-Language" content="en-us"> | ||
| <title>IupTree Callbacks</title> | ||
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| <link rel="stylesheet" type="text/css" href="../../style.css"> | ||
| <style type="text/css"> | ||
| .style1 { | ||
| text-decoration: underline; | ||
| } | ||
| </style> | ||
| </head> | ||
| <body> | ||
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| <h3>IupTree Callbacks</h3> | ||
| <p><strong>SELECTION_CB</strong>: Action generated when a node is selected | ||
| or deselected. This action occurs when the user clicks with the mouse or uses the keyboard with the appropriate | ||
| combination of keys. It may be called more than once for the same node with | ||
| the same status.</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id, int </strong>status) [in C] | ||
| <strong>elem</strong>:selection_cb(<strong>id, status:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| Node identifier.<br> | ||
| <strong>status</strong>: 1=node selected, 0=node unselected. </p> | ||
| <p><strong>MULTISELECTION_CB</strong>: | ||
| Action generated | ||
| after a continuous range of nodes is selected in one single operation. If | ||
| not defined the SELECTION_CB with status=1 will be called for all nodes in the | ||
| range. The range is always completely included, independent if some nodes were already | ||
| marked. That single operation also guaranties that all other nodes outside the | ||
| range are already not selected. Called only if MARKMODE=MULTIPLE.</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int* <strong>ids, int </strong>n) [in C] | ||
| <strong>elem</strong>:multiselection_cb(<strong>ids: </strong>table<strong>, n:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>ids</strong>: | ||
| Array of node identifiers. This array is kept for backward compatibility, | ||
| the range is simply defined by ids[0] to ids[n-1], where <code>ids[i+1]=ids[i]+1</code>.<br> | ||
| <b>n</b>: Number of nodes in the array.</p> | ||
| <p><strong>MULTIUNSELECTION_CB</strong>: | ||
| Action generated | ||
| before multiple nodes are unselected in one single operation. If | ||
| not defined the SELECTION_CB with status=0 will be called for all nodes in the | ||
| range. The range is not necessarily continuous. Called only if MARKMODE=MULTIPLE. | ||
| (Since 3.1)</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int* <strong>ids, int </strong>n) [in C] | ||
| <strong>elem</strong>:multiunselection_cb(<strong>ids: </strong>table<strong>, n:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>ids</strong>: | ||
| Array of node identifiers.<br> | ||
| <b>n</b>: Number of nodes in the array.</p> | ||
| <hr> | ||
| <p><strong>BRANCHOPEN_CB</strong>: | ||
| Action generated when a branch is expanded. | ||
| This action occurs when the user clicks the "+" sign on the left of the branch, or when double clicks the branch, or hits Enter on a collapsed branch.</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>) [in C] | ||
| <strong>elem</strong>:branchopen_cb(<strong>id:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| node identifier. </p> | ||
| <p class="info"><span class="style1">Returns:</span> IUP_IGNORE for the branch not to be opened, or IUP_DEFAULT for the branch to be opened.</p> | ||
| <p><strong>BRANCHCLOSE_CB</strong>: | ||
| Action generated when a branch is collapsed. | ||
| This action occurs when the user clicks the "-" | ||
| sign on the left of the branch, or when double | ||
| clicks | ||
| the branch, or hits Enter on an expanded branch. | ||
| </p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>); [in C] | ||
| <strong>elem</strong>:branchclose_cb(<strong>id:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| node identifier. </p> | ||
| <p class="info"><span class="style1">Returns:</span> IUP_IGNORE for the branch not to be closed, or IUP_DEFAULT for the branch to be closed.</p> | ||
| <p><strong>EXECUTELEAF_CB</strong>: | ||
| Action generated when a leaf is to be | ||
| executed. This action occurs when the user double clicks a | ||
| leaf, or hits Enter on a leaf. | ||
| </p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>); [in C] | ||
| <strong>elem</strong>:executeleaf_cb(<strong>id:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| node identifier. | ||
| <br> | ||
| </p> | ||
| <hr> | ||
| <p><strong>SHOWRENAME_CB</strong>: | ||
| Action generated when a node is about to be renamed. | ||
| It occurs when the user clicks twice the node or press | ||
| <b>F2</b>. Called only if SHOWRENAME=YES.</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>); [in C]<strong> | ||
| elem</strong>:showrename_cb(<strong>id:</strong> number:<strong> </strong>string) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| node identifier. | ||
| </p> | ||
| <p class="info"><span class="style1">Returns:</span> if IUP_IGNORE is returned, | ||
| the rename is canceled (in GTK the rename continuous but the edit box is | ||
| read-only).<br> | ||
| </p> | ||
| <p><strong>RENAME_CB</strong>: | ||
| Action generated after a node was renamed in | ||
| place. It occurs when the user press <b>Enter</b> after editing the name, or when the text box looses it focus. | ||
| Called only if SHOWRENAME=YES.</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>, char *<strong>title</strong>); [in C]<strong> | ||
| elem</strong>:rename_cb(<strong>id:</strong> number, <strong>title</strong>:<strong> </strong>string) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| node identifier. <br> | ||
| <strong>title</strong>: new node title. </p> | ||
| <p class="info"><span class="style1">Returns:</span> The new title is accepted only if the callback returns IUP_DEFAULT. If the callback does not exists the new | ||
| title | ||
| is always accepted. If the user pressed <b>Enter</b> and the callback returns IUP_IGNORE the editing continues. If | ||
| the text box looses its focus the editing stops always.<br> | ||
| </p> | ||
| <hr> | ||
| <p><strong>DRAGDROP_CB</strong>: | ||
| Action generated when | ||
| an internal drag & drop is executed. Only active if <strong>SHOWDRAGDROP=YES.</strong></p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <b>drag_id</b>, int <b>drop_id</b>, int <b>isshift</b>, int <b>iscontrol</b>); [in C] | ||
| <strong>elem</strong>:dragdrop_cb(<b>drag_id</b>, <b>drop_id</b>, <b>isshift</b>, <b>iscontrol</b><strong>:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>drag_id</strong>: | ||
| Identifier of the clicked node where the | ||
| drag start. <br> | ||
| <strong>drop_id</strong>: | ||
| Identifier of the clicked node where the | ||
| drop were executed. -1 indicates a drop in a blank area.<br> | ||
| <strong>isshift</strong>: Boolean flag indicating the shift key state. <br> | ||
| <strong>iscontrol</strong>: Boolean flag indicating the control key state.</p> | ||
| <p class="info"><span class="style1">Returns:</span> if returns IUP_CONTINUE, or | ||
| if the callback is not defined and <strong>SHOWDRAGDROP=YES</strong>, then the node | ||
| is moved to the new position. If Ctrl is pressed then the node is copied instead | ||
| of moved. If the drop node is a branch and it is expanded, | ||
| then the drag node is inserted as the first child of the node. If the branch is | ||
| not expanded or the node is a leaf, then the drag node is inserted as the next brother | ||
| of the drop node.<br> | ||
| </p> | ||
| <p><strong>NODEREMOVED_CB</strong>: | ||
| Action generated when a node is going to be removed. It is only a | ||
| notification, the action can not be aborted. No node dependent attribute can be | ||
| consulted during the callback. Not called when the tree is unmapped. It is | ||
| useful to remove memory allocated for the | ||
| userdata. (since 3.0)</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, void* <strong>userdata</strong>); [in C] | ||
| <strong>elem</strong>:noderemoved_cb(<strong>userid</strong>: userdata/table) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>userdata/userid</strong>: USERDATA attribute in C, or userid object in | ||
| Lua.</p> | ||
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| <p><strong>RIGHTCLICK_CB</strong>: Action generated when the right mouse button | ||
| is pressed over a node.</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>); [in C] | ||
| <strong>elem</strong>:rightclick_cb(<strong>id:</strong> number) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: identifier of the element that activated | ||
| the event. <br> | ||
| <strong>id</strong>: | ||
| node identifier. </p> | ||
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| <hr> | ||
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| <p><strong>TOGGLEVALUE_CB</strong>: Action generated when the toggle's state was | ||
| changed. The callback also receives the new toggle's state. (since 3.6)</p> | ||
| <pre>int function(Ihandle *<strong>ih</strong>, int <strong>id</strong>, int <strong>state</strong>); [in C]<strong> | ||
| elem</strong>:togglevalue_cb(<strong>id, state:</strong> number:<strong> </strong>string) -> (<strong>ret</strong>: number) [in Lua]</pre> | ||
| <p class="info"><strong>ih</strong>: | ||
| identifier of the element that activated the | ||
| event.<br> | ||
| <strong>id</strong>: | ||
| node identifier. <br> | ||
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| <strong>state</strong>: | ||
| 1 if the toggle's state was shifted to ON; 0 if it was shifted to OFF. If | ||
| SHOW3STATE=YES, −1 if it was shifted to NOTDEF.</p> | ||
| <hr> | ||
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| <p><a href="../call/iup_button_cb.html">BUTTON_CB</a>: | ||
| Action generated when any mouse button is | ||
| pressed or released inside the element. Use | ||
| <a href="../func/iupconvertxytopos.html">IupConvertXYToPos</a> to convert | ||
| (x,y) coordinates in the node identifier. (since 3.0)</p> | ||
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| <p><a href="../call/iup_motion_cb.html">MOTION_CB</a>: | ||
| Action generated when the mouse is moved over the element. Use | ||
| <a href="../func/iupconvertxytopos.html">IupConvertXYToPos</a> | ||
| to convert (x,y) coordinates in item the node identifier. (since 3.0)</p> | ||
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| <p><a href="../call/iup_dropfiles_cb.html">DROPFILES_CB</a> [Windows and GTK Only]: Action generated when one or | ||
| more files are dropped in the element. (since 3.0)</p> | ||
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| <hr> | ||
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| <p><a href="../call/iup_map_cb.html">MAP_CB</a>, | ||
| <a href="../call/iup_unmap_cb.html">UNMAP_CB</a>, | ||
| <a href="../call/iup_getfocus_cb.html">GETFOCUS_CB</a>, | ||
| <a href="../call/iup_killfocus_cb.html">KILLFOCUS_CB</a>, | ||
| <a href="../call/iup_enterwindow_cb.html">ENTERWINDOW_CB</a>, | ||
| <a href="../call/iup_leavewindow_cb.html">LEAVEWINDOW_CB</a>, | ||
| <a href="../call/iup_k_any.html">K_ANY</a>, | ||
| <a href="../call/iup_help_cb.html">HELP_CB</a>: All common callbacks are | ||
| supported.</p> | ||
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| <p>In Motif the tree always resets the focus to the first node when receive the | ||
| focus. The KILLFOCUS_CB callback is called only when the focus is at the first | ||
| node. Also in Motif some LEAVEWINDOW_CB events are delayed to when the user | ||
| enter again, firing a leave and enter events at enter time.</p> | ||
| <p> | ||
| <a href="../attrib/iup_dragdrop.html">Drag & Drop</a> callbacks are | ||
| supported, but | ||
| SHOWDRAGDROP must be set to NO. </p> | ||
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| </body> | ||
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| </html> |
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