gecko-dev/lib/mac/UserInterface/CTableKeySingleSelector.cp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "CTableKeySingleSelector.h"
#include <LTableView.h>
#include <LCommander.h>
#include <PP_KeyCodes.h>
// ---------------------------------------------------------------------------
// ¥ CTableKeySingleSelector
// ---------------------------------------------------------------------------
CTableKeySingleSelector::CTableKeySingleSelector(
LTableView* inTable)
: LAttachment(msg_KeyPress)
{
mTable = inTable;
}
// ---------------------------------------------------------------------------
// ¥ CTableKeySingleSelector
// ---------------------------------------------------------------------------
// Stream constructor.
CTableKeySingleSelector::CTableKeySingleSelector(
LStream* inStream)
: LAttachment(inStream)
{
mTable = (dynamic_cast<LTableView*>
(LAttachable::GetDefaultAttachable()));
SetMessage(msg_KeyPress);
}
// ---------------------------------------------------------------------------
// ¥ ~CTableKeySingleSelector
// ---------------------------------------------------------------------------
// Destructor
CTableKeySingleSelector::~CTableKeySingleSelector()
{
}
#pragma mark -
// ---------------------------------------------------------------------------
// ¥ ExecuteSelf
// ---------------------------------------------------------------------------
// Decode the message and dispatch it.
void
CTableKeySingleSelector::ExecuteSelf(
MessageT inMessage,
void* ioParam)
{
SetExecuteHost(true);
switch (inMessage)
{
case msg_KeyPress:
HandleKeyEvent((EventRecord*) ioParam);
break;
}
}
// ---------------------------------------------------------------------------
// ¥ HandleKeyEvent
// ---------------------------------------------------------------------------
// Recognize and dispatch the arrow keys.
void
CTableKeySingleSelector::HandleKeyEvent(
const EventRecord* inEvent)
{
// Sanity check: Make sure we point to a valid table.
if (mTable == nil)
return;
// Prevent arrow keys from going through to host.
SetExecuteHost(false);
// Decode the key-down message.
Int16 theKey = inEvent->message & charCodeMask;
switch (theKey)
{
case char_UpArrow:
UpArrow();
break;
case char_DownArrow:
DownArrow();
break;
default:
SetExecuteHost(true); // some other key, let host respond
break;
}
}
#pragma mark -
// ---------------------------------------------------------------------------
// ¥ UpArrow
// ---------------------------------------------------------------------------
// Select the next cell above the current cell. If no cell is selected,
// select the bottom left cell.
void
CTableKeySingleSelector::UpArrow()
{
// Find first selected cell.
STableCell theCell;
if (mTable->GetNextSelectedCell(theCell))
{
// Found a selected cell.
// If not in the first row, move up one and select.
if (theCell.row > 1)
{
theCell.row--;
mTable->UnselectAllCells();
mTable->SelectCell(theCell);
ScrollRowIntoFrame(theCell.row);
}
}
else
{
// Nothing selected. Start from bottom.
TableIndexT rows, cols;
mTable->GetTableSize(rows, cols);
if (rows > 0)
{
theCell.row = rows;
theCell.col = 1;
mTable->UnselectAllCells();
mTable->SelectCell(theCell);
ScrollRowIntoFrame(theCell.row);
}
}
}
// ---------------------------------------------------------------------------
// ¥ DownArrow
// ---------------------------------------------------------------------------
// Select the next cell below the current cell. If no cell is selected,
// select the top left cell.
void
CTableKeySingleSelector::DownArrow()
{
// Find first selected cell.
TableIndexT rows, cols;
STableCell theCell;
if (!mTable->GetNextSelectedCell(theCell))
{
// Nothing selected. Start from top.
mTable->GetTableSize(rows, cols);
if (rows > 0) {
theCell.row = 1;
theCell.col = 1;
mTable->UnselectAllCells();
mTable->SelectCell(theCell);
ScrollRowIntoFrame(theCell.row);
}
}
else
{
// Found a selected cell. Look for last selected cell.
STableCell lastCell = theCell;
while (mTable->GetNextSelectedCell(theCell))
{
lastCell = theCell;
}
// Found last selected cell.
// If not in the last row, move down one and select.
mTable->GetTableSize(rows, cols);
if (lastCell.row < rows)
{
lastCell.row++;
mTable->UnselectAllCells();
mTable->SelectCell(lastCell);
ScrollRowIntoFrame(lastCell.row);
}
}
}
// ---------------------------------------------------------------------------
// ¥ ScrollRowIntoFrame
// ---------------------------------------------------------------------------
void
CTableKeySingleSelector::ScrollRowIntoFrame(
TableIndexT inRow)
{
// Find out how many columns are in the table.
TableIndexT rows, cols;
mTable->GetTableSize(rows, cols);
// Find the first seelcted cell.
STableCell cell;
cell.row = inRow;
cell.col = 1;
while (cell.col <= cols)
{
if (mTable->CellIsSelected(cell))
{
mTable->ScrollCellIntoFrame(cell);
return;
}
cell.col++;
}
// No selection shown anywhere, just choose the first cell in the row.
cell.col = 1;
mTable->ScrollCellIntoFrame(cell);
}