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|
/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2007 Derrell Lipman
License:
LGPL: http://www.gnu.org/licenses/lgpl.html
EPL: http://www.eclipse.org/org/documents/epl-v10.php
See the LICENSE file in the project's top-level directory for details.
Authors:
* Derrell Lipman (derrell)
************************************************************************ */
/* ************************************************************************
#module(table)
************************************************************************ */
/**
* The default resize behavior. Until a resize model is loaded, the default
* behavior is to:
* <ol>
* <li>
* Upon the table initially appearing, and upon any window resize, divide
* the table space equally between the visible columns.
* </li>
* <li>
* When a column is increased in width, all columns to its right are
* pushed to the right with no change to their widths. This may push some
* columns off the right edge of the table, causing a horizontal scroll
* bar to appear.
* </li>
* <li>
* When a column is decreased in width, if the total width of all columns
* is <i>greater than</i> the table width, no additional column wiidth
* changes are made.
* </li>
* <li>
* When a column is decreased in width, if the total width of all columns
* is <i>less than</i> the width of the table, the visible column
* immediately to the right of the column which decreased in width has its
* width increased to fill the remaining space.
* </li>
* </ol>
*
* A resize model may be loaded to provide more guidance on how to adjust
* column width upon each of the events: initial appear, window resize, and
* column resize. *** TO BE FILLED IN ***
*/
qx.OO.defineClass("qx.ui.table.DefaultResizeBehavior",
qx.ui.table.AbstractResizeBehavior,
function()
{
qx.ui.table.AbstractResizeBehavior.call(this);
});
/*
* A function to instantiate a resize behavior column data object.
*/
qx.OO.addProperty(
{
name :
"newResizeBehaviorColumnData",
type :
"function",
setOnlyOnce :
true,
defaultValue:
function(obj)
{
return new qx.ui.table.ResizeBehaviorColumnData();
}
});
/**
* Set the width of a column.
*
* @param col {Integer}
* The column whose width is to be set
*
* @param width {Integer, String}
* The width of the specified column. The width may be specified as integer
* number of pixels (e.g. 100), a string representing percentage of the
* inner width of the Table (e.g. "25%"), or a string representing a flex
* width (e.g. "1*").
*/
qx.Proto.setWidth = function(col, width)
{
// Ensure the column is within range
if (col >= this._resizeColumnData.length)
{
throw new Error("Column number out of range");
}
// Set the new width
this._resizeColumnData[col].setWidth(width);
};
/**
* Set the minimum width of a column.
*
* @param col {Integer}
* The column whose minimum width is to be set
*
* @param width {Integer}
* The minimum width of the specified column.
*/
qx.Proto.setMinWidth = function(col, width)
{
// Ensure the column is within range
if (col >= this._resizeColumnData.length)
{
throw new Error("Column number out of range");
}
// Set the new width
this._resizeColumnData[col].setMinWidth(width);
};
/**
* Set the maximum width of a column.
*
* @param col {Integer}
* The column whose maximum width is to be set
*
* @param width {Integer}
* The maximum width of the specified column.
*/
qx.Proto.setMaxWidth = function(col, width)
{
// Ensure the column is within range
if (col >= this._resizeColumnData.length)
{
throw new Error("Column number out of range");
}
// Set the new width
this._resizeColumnData[col].setMaxWidth(width);
};
/**
* Set any or all of the width, minimum width, and maximum width of a column
* in a single call.
*
* @param map {Map}
* A map containing any or all of the property names "width", "minWidth",
* and "maxWidth". The property values are as described for
* {@link #setWidth}, {@link #setMinWidth} and {@link #setMaxWidth}
* respectively.
*/
qx.Proto.set = function(col, map)
{
for (var prop in map)
{
switch(prop)
{
case "width":
this.setWidth(col, map[prop]);
break;
case "minWidth":
this.setMinWidth(col, map[prop]);
break;
case "maxWidth":
this.setMaxWidth(col, map[prop]);
break;
default:
throw new Error("Unknown property: " + prop);
}
}
};
// overloaded
qx.Proto.onAppear = function(tableColumnModel, event)
{
// Get the initial available width so we know whether a resize caused an
// increase or decrease in the available space.
this._width = this._getAvailableWidth(tableColumnModel);
// Calculate column widths
this._computeColumnsFlexWidth(tableColumnModel, event);
};
// overloaded
qx.Proto.onTableWidthChanged = function(tableColumnModel, event)
{
// Calculate column widths
this._computeColumnsFlexWidth(tableColumnModel, event);
};
// overloaded
qx.Proto.onColumnWidthChanged = function(tableColumnModel, event)
{
// Extend the next column to fill blank space
this._extendNextColumn(tableColumnModel, event);
};
// overloaded
qx.Proto.onVisibilityChanged = function(tableColumnModel, event)
{
// Extend the last column to fill blank space
this._extendLastColumn(tableColumnModel, event);
};
// overloaded
qx.Proto._setNumColumns = function(numColumns)
{
// Are there now fewer (or the same number of) columns than there were
// previously?
if (numColumns <= this._resizeColumnData.length)
{
// Yup. Delete the extras.
this._resizeColumnData.splice(numColumns);
return;
}
// There are more columns than there were previously. Allocate more.
for (var i = this._resizeColumnData.length; i < numColumns; i++)
{
this._resizeColumnData[i] = this.getNewResizeBehaviorColumnData()();
this._resizeColumnData[i]._columnNumber = i;
}
};
/**
* Computes the width of all flexible children (based loosely on the method of
* the same name in HorizontalBoxLayoutImpl).
*
* @param tableColumnModel {qx.ui.table.ResizeTableColumnModel}
* The table column model in use.
*
* @param event
* The event object.
*/
qx.Proto._computeColumnsFlexWidth = function(tableColumnModel, event)
{
// Semi-permanent configuration settings
var debug = true;
if (debug)
{
this.debug("computeColumnsFlexWidth");
}
var visibleColumns = tableColumnModel._visibleColumnArr;
var visibleColumnsLength = visibleColumns.length;
var columnData;
var flexibleColumns = [ ];
var widthUsed = 0;
var i;
// Determine the available width
var width = this._getAvailableWidth(tableColumnModel);
// *************************************************************
// 1. Compute the sum of all static sized columns and find
// all flexible columns.
// *************************************************************
for (i = 0; i < visibleColumnsLength; i++)
{
// Get the current column's column data
columnData = this._resizeColumnData[visibleColumns[i]];
// Is this column width type "auto"?
if (columnData._computedWidthTypeAuto)
{
// Yup. Convert it to a Flex "1*"
columnData._computedWidthTypeAuto = false;
columnData._computedWidthTypeFlex = true;
columnData._computedWidthParsed = 1;
}
// Is this column a flex width?
if (columnData._computedWidthTypeFlex)
{
// Yup. Save it for future processing.
flexibleColumns.push(columnData);
}
else if (columnData._computedWidthTypePercent)
{
// We can calculate the width of a Percent type right now. Convert it
// to a Flex type that's already calculated (no further calculation
// required).
columnData._computedWidthPercentValue =
Math.round(width * (columnData._computedWidthParsed / 100));
widthUsed += columnData._computedWidthPercentValue;
}
else
{
// We have a fixed width. Track width already allocated.
widthUsed += columnData.getWidth();
}
}
if (debug)
{
this.debug("Width: " + widthUsed + "/" + width);
this.debug("Flexible Count: " + flexibleColumns.length);
}
// *************************************************************
// 2. Compute the sum of all flexible column widths
// *************************************************************
var widthRemaining = width - widthUsed;
var flexibleColumnsLength = flexibleColumns.length;
var prioritySum = 0;
for (i = 0; i < flexibleColumnsLength; i++)
{
prioritySum += flexibleColumns[i]._computedWidthParsed;
}
// *************************************************************
// 3. Calculating the size of each 'part'.
// *************************************************************
var partWidth = widthRemaining / prioritySum;
// *************************************************************
// 4. Adjust flexible columns, taking min/max values into account
// *************************************************************
bSomethingChanged = true;
for (flexibleColumnsLength = flexibleColumns.length;
bSomethingChanged && flexibleColumnsLength > 0;
flexibleColumnsLength = flexibleColumns.length)
{
// Assume nothing will change
bSomethingChanged = false;
for (i = flexibleColumnsLength - 1; i >= 0; i--)
{
columnData = flexibleColumns[i];
computedFlexibleWidth =
columnData._computedWidthFlexValue =
columnData._computedWidthParsed * partWidth;
// If the part is not within its specified min/max range, adjust it.
var min = columnData.getMinWidthValue();
var max = columnData.getMaxWidthValue();
if (min && computedFlexibleWidth < min)
{
columnData._computedWidthFlexValue = Math.round(min);
widthUsed += columnData._computedWidthFlexValue;
qx.lang.Array.removeAt(flexibleColumns, i);
bSomethingChanged = true;
// Don't round fixed-width columns (in step 5)
columnData = null;
}
else if (max && computedFlexibleWidth > max)
{
columnData._computedWidthFlexValue = Math.round(max);
widthUsed += columnData._computedWidthFlexValue;
qx.lang.Array.removeAt(flexibleColumns, i);
bSomethingChanged = true;
// Don't round fixed-width columns (in step 5)
columnData = null;
}
}
}
// If any flexible columns remain, then allocate the remaining space to them
if (flexibleColumns.length > 0)
{
// Recalculate the priority sum of the remaining flexible columns
prioritySum = 0;
for (i = 0; i < flexibleColumnsLength; i++)
{
prioritySum += flexibleColumns[i]._computedWidthParsed;
}
// Recalculate the width remaining and part width
widthRemaining = width - widthUsed;
partWidth = widthRemaining / prioritySum;
// If there's no width remaining...
if (widthRemaining <= 0)
{
// ... then use minimum width * priority for all remaining columns
for (i = 0; i < flexibleColumnsLength; i++)
{
columnData = flexibleColumns[i];
computedFlexibleWidth =
columnData._computedWidthFlexValue =
(qx.ui.table.DefaultResizeBehavior.MIN_WIDTH *
flexibleColumns[i]._computedWidthParsed);
columnData._computedWidthFlexValue = Math.round(computedFlexibleWidth);
widthUsed += columnData._computedWidthFlexValue;
}
}
else
{
// Assign widths of remaining flexible columns
for (i = 0; i < flexibleColumnsLength; i++)
{
columnData = flexibleColumns[i];
computedFlexibleWidth =
columnData._computedWidthFlexValue =
columnData._computedWidthParsed * partWidth;
// If the computed width is less than our hard-coded minimum...
if (computedFlexibleWidth <
qx.ui.table.DefaultResizeBehavior.MIN_WIDTH)
{
// ... then use the hard-coded minimum
computedFlexibleWidth = qx.ui.table.DefaultResizeBehavior.MIN_WIDTH;
}
columnData._computedWidthFlexValue = Math.round(computedFlexibleWidth);
widthUsed += columnData._computedWidthFlexValue;
}
}
}
// *************************************************************
// 5. Fix rounding errors
// *************************************************************
if (columnData != null && widthRemaining > 0)
{
columnData._computedWidthFlexValue += width - widthUsed;
}
// *************************************************************
// 6. Set the column widths to what we have calculated
// *************************************************************
for (i = 0; i < visibleColumnsLength; i++)
{
var colWidth;
// Get the current column's column data
columnData = this._resizeColumnData[visibleColumns[i]];
// Is this column a flex width?
if (columnData._computedWidthTypeFlex)
{
// Yup. Set the width to the calculated width value based on flex
colWidth = columnData._computedWidthFlexValue;
}
else if (columnData._computedWidthTypePercent)
{
// Set the width to the calculated width value based on percent
colWidth = columnData._computedWidthPercentValue;
}
else
{
colWidth = columnData.getWidth();
}
// Now that we've calculated the width, set it.
tableColumnModel.setColumnWidth(visibleColumns[i], colWidth);
if (debug)
{
this.debug("col " + columnData._columnNumber + ": width=" + colWidth);
}
}
};
/**
* Extend the visible column to right of the column which just changed width,
* to fill any available space within the inner width of the table. This
* means that if the sum of the widths of all columns exceeds the inner width
* of the table, no change is made. If, on the other hand, the sum of the
* widths of all columns is less than the inner width of the table, the
* visible column to the right of the column which just changed width is
* extended to take up the width available within the inner width of the
* table.
*
* @param tableColumnModel {qx.ui.table.ResizeTableColumnModel}
* The table column model in use.
*
* @param event
* The event object.
*/
qx.Proto._extendNextColumn = function(tableColumnModel, event)
{
// Event data properties: col, oldWidth, newWidth
var data = event.getData();
var visibleColumns = tableColumnModel._visibleColumnArr;
// Determine the available width
var width = this._getAvailableWidth(tableColumnModel);
// Determine the number of visible columns
var numColumns = visibleColumns.length;
// Did this column become longer than it was?
if (data.newWidth > data.oldWidth)
{
// Yup. Don't resize anything else. The other columns will just get
// pushed off and require scrollbars be added (if not already there).
return;
}
// This column became shorter. See if we no longer take up the full space
// that's available to us.
var i;
var nextCol;
var widthUsed = 0;
for (i = 0; i < numColumns; i++)
{
widthUsed +=
tableColumnModel.getColumnWidth(visibleColumns[i]);
}
// If the used width is less than the available width...
if (widthUsed < width)
{
// ... then determine the next visible column
for (i = 0; i < visibleColumns.length; i++)
{
if (visibleColumns[i] == data.col)
{
nextCol = visibleColumns[i + 1];
break;
}
}
if (nextCol)
{
// Make the next column take up the available space.
var oldWidth = tableColumnModel.getColumnWidth(nextCol);
var newWidth = (width - (widthUsed -
tableColumnModel.getColumnWidth(nextCol)));
tableColumnModel.setColumnWidth(nextCol, newWidth);
}
}
};
/**
* If a column was just made invisible, extend the last column to fill any
* available space within the inner width of the table. This means that if
* the sum of the widths of all columns exceeds the inner width of the table,
* no change is made. If, on the other hand, the sum of the widths of all
* columns is less than the inner width of the table, the last column is
* extended to take up the width available within the inner width of the
* table.
*
* @param tableColumnModel {qx.ui.table.ResizeTableColumnModel}
* The table column model in use.
*
* @param event
* The event object.
*/
qx.Proto._extendLastColumn = function(tableColumnModel, event)
{
// Event data properties: col, visible
var data = event.getData();
// If the column just became visible, don't make any width changes
if (data.visible)
{
return;
}
// Get the array of visible columns
var visibleColumns = tableColumnModel._visibleColumnArr;
// Determine the available width
var width = this._getAvailableWidth(tableColumnModel);
// Determine the number of visible columns
var numColumns = visibleColumns.length;
// See if we no longer take up the full space that's available to us.
var i;
var lastCol;
var widthUsed = 0;
for (i = 0; i < numColumns; i++)
{
widthUsed +=
tableColumnModel.getColumnWidth(visibleColumns[i]);
}
// If the used width is less than the available width...
if (widthUsed < width)
{
// ... then get the last visible column
lastCol = visibleColumns[visibleColumns.length - 1];
// Make the last column take up the available space.
var oldWidth = tableColumnModel.getColumnWidth(lastCol);
var newWidth = (width - (widthUsed -
tableColumnModel.getColumnWidth(lastCol)));
tableColumnModel.setColumnWidth(lastCol, newWidth);
}
};
qx.Class.MIN_WIDTH = 10;
|