GWT2.4, CellTable with SimplePager, every page show 5 items(rows), suppose i have 8 items totally, at the first page i can see [1-5], when i press next, it will show [4-8] ( getVisibleRange() is [4-8]), i want it to show [6-8], Is there any way i can achieve this?
Thanks in advance.
Try setting
setRangeLimited(false)
with SimplePager
Or you can also override
#Override
public void setPageStart(int index) {
if (getDisplay() != null) {
Range range = getDisplay().getVisibleRange();
int pageSize = range.getLength();
// Removed the min to show fixed ranges
//if (isRangeLimited && display.isRowCountExact()) {
// index = Math.min(index, display.getRowCount() - pageSize);
//}
index = Math.max(0, index);
if (index != range.getStart()) {
getDisplay().setVisibleRange(index, pageSize);
}
}
Related
I have an Tree and a button to add treeItems in each treeItem, sow how can I prevent user to make more then 2 level of treeItems on a tree in SWT?
Found solution:
private int getLevelOfItem(TreeItem item)
{
int counter = 0;
while(item.getParentItem() != null)
{
item = item.getParentItem();
counter++;
}
return counter;
}
I am learner in c# and I have a small doubt.
In my windows form page, I have a tabControl contains 3 tabPages.I also have a comboBox outside the tabControl with 3 items listing the names of tab pages.
What i want to do is select the name of the first tabPage from the comboBox, and only that tabPage should be displayed by hiding the other tabPages.
Visibility property is not applicable to tabPages. So how can i do this?
Thanks in advance.
According to Hiding and Showing Tabpages in a Tabcontrol by Debasmit Samal:
Visiblity property has not been implemented on the TabControl, and
there is no Insert method also. Some workaround on this
private void HideTabPage(TabPage tp)
{
if (tabControl1.TabPages.Contains(tp))
tabControl1.TabPages.Remove(tp);
}
private void ShowTabPage(TabPage tp)
{
ShowTabPage(tp, tabControl1.TabPages.Count);
}
private void ShowTabPage(TabPage tp , int index)
{
if (tabControl1.TabPages.Contains(tp)) return;
InsertTabPage(tp, index);
}
private void InsertTabPage(TabPage tabpage, int index)
{
if (index < 0 || index > tabControl1.TabCount)
throw new ArgumentException("Index out of Range.");
tabControl1.TabPages.Add(tabpage);
if (index < tabControl1.TabCount - 1)
do
{
SwapTabPages(tabpage, (tabControl1.TabPages[tabControl1.TabPages.IndexOf(tabpage) - 1]));
}
while (tabControl1.TabPages.IndexOf(tabpage) != index);
tabControl1.SelectedTab = tabpage;
}
private void SwapTabPages(TabPage tp1, TabPage tp2)
{
if (tabControl1.TabPages.Contains(tp1) == false || tabControl1.TabPages.Contains(tp2) == false)
throw new ArgumentException("TabPages must be in the TabControls TabPageCollection.");
int Index1 = tabControl1.TabPages.IndexOf(tp1);
int Index2 = tabControl1.TabPages.IndexOf(tp2);
tabControl1.TabPages[Index1] = tp2;
tabControl1.TabPages[Index2] = tp1;
//Uncomment the following section to overcome bugs in the Compact Framework
//tabControl1.SelectedIndex = tabControl1.SelectedIndex;
//string tp1Text, tp2Text;
//tp1Text = tp1.Text;
//tp2Text = tp2.Text;
//tp1.Text=tp2Text;
//tp2.Text=tp1Text;
}
void CatchSelection(QModelIndex item)
{
if(item.row() == -1)
{
return;
}
if (item.parent().row() != -1)
{
QModelIndex idx = model()->index(item.row(), 1, item.parent());
__int64 value = model()->data(idx).toLongLong();
}
}
The above code doesn't work. I'm trying to get data out of a Qt 5.1 QTreeView when the user clicks on an item. Then I'm trying to select the 2nd column of that item (it has a number I need).
What am I missing?
I am using GWT 2.5 to create a CellTable with a sortable date column.
My code is as follows:
CellTable<Activity> table = new CellTable<Activity>();
table.setRowStyles(new RowStyles<Activity>() {
#Override
public String getStyleNames(Activity row, int rowIndex) {
return TABLE_ROW_STYLE_NAME;
}
});
// create date column
TextColumn<Activity> dateColumn = new TextColumn<Activity>() {
#Override
public String getValue(Activity a) {
return dateFormat.format(a.getDate());
}
};
dateColumn.setSortable(true);
dateColumn.setDefaultSortAscending(false);
// add column to table
table.addColumn(dateColumn, myConstants.dateColumnHeader());
// attach provider to table
activityProvider.addDataDisplay(table);
// create sort handler
ListHandler<Activity> sortHandler = new ListHandler<Activity>(activityProvider.getList());
sortHandler.setComparator(dateColumn, new Comparator<Activity>() {
#Override
public int compare(Activity a1, Activity a2) {
if (a1 == a2) {
return 0;
}
// compare the date columns
if (a1 != null) {
if (a2 != null) {
long a1Val = a1.getDate().getTime();
long a2Val = a2.getDate().getTime();
if (a1Val == a2Val) {
return 0;
}
else if (a1Val > a2Val) {
return 1;
}
else {
return -1;
}
}
else {
return 1;
}
}
return -1;
}
});
// add sort handler to table
table.addColumnSortHandler(sortHandler);
// add date column to table's sort list
table.getColumnSortList().push(dateColumn);
table.setWidth("100%");
getView().getActivityPanel().add(table);
With this code, the data is displayed in the table and the sorting arrow on the column appears. However, nothing happens when I click on the sortable column's header. The sorting order doesn't change, rows are not rearranged.
Can anyone spot the problem here? This code is almost the same as what they have in Google's own example.
This is what I use:
dateColumn.setSortable(true);
sortHandler.setComparator(dateColumn, new Comparator<ObjectPobject>() {
public int compare(ObjectPobject o1, ObjectPobject o2) {
return o1.getDate().compareTo(o2.getDate());
}
});
It should be
a1.getDate().getTime().compareTo(a2.getDate().getTime())
or
a1.getDate().after(a2.getDate())
This happens because GWT uses JavaScript comparisons, and compareTo does not work for dates.
I am using GWT 2.3.I which I am using GWT cell table.
Here below is the code for my cell table:
public class FormGrid extends SuperGrid {
List<Form> formList;
#Override
public void setColumns(CellTable table) {
TextColumn<Form> nameColumn = new TextColumn<Form>() {
#Override
public String getValue(Form object) {
return object.getName();
}
};
table.addColumn(nameColumn, "Name");
}
#Override
public void setData() {
if (formList != null && formList.size() > 0) {
AsyncDataProvider<Form> provider = new AsyncDataProvider<Form>() {
#Override
protected void onRangeChanged(HasData<Form> display) {
int start = display.getVisibleRange().getStart();
int end = start + display.getVisibleRange().getLength();
end = end >= formList.size() ? formList.size() : end;
List<Form> sub = formList.subList(start, end);
updateRowData(start, sub);
}
};
provider.addDataDisplay(getTable());
provider.updateRowCount(formList.size(), true);
}
}
public List<Form> getFormList() {
return formList;
}
public void setFormList(List<Form> formList) {
this.formList = formList;
}
}
In this my set column and set data will be called fro super class flow.This cell table is working fine.
Now I want to put a filter type facility (like search) in this cell table.It should be like, there is a texbox above the cell table and what ever written in that text box, it should fire a like query to all form name for that text box value.
for example I have 1000 form in the grid.Now if user writes 'app' in some filter textbox above the cell table the all the form which have 'app' in there name will be filtered and grid has only those forms only.
This is the first case:
Another case is I am only render one column in grid name.I have two more properties in form (description,tag).But I am not rendering them.now for filter if user writes 'app' in filter box then it should make a query to all three (name, description, and tag) and should return if 'app' matched to any of three.
I am not getting how to apply filter in cell table.
Please help me out.Thanks in advance.
You can find an implementation in the expenses sample.
Here is a short summary of the steps
1.) Create a Textbox and a SearchButton.
2.) add a clickHandler to the SearchButton (You can also add KeyUpHandler to the Textbox alternatively)
searchButton.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
search();
}
});
3.) In the search function retrieve the searchString and store it.
private void search() {
searchString = searchBox.getText();
setData();
}
4.) modify your setdata() function to take searchString into account
#Override
public void setData() {
if (formList != null && formList.size() > 0) {
AsyncDataProvider<Form> provider = new AsyncDataProvider<Form>() {
#Override
protected void onRangeChanged(HasData<Form> display) {
int start = display.getVisibleRange().getStart();
int end = start + display.getVisibleRange().getLength();
//new function if searchString is specified take into account
List<Form> sub = getSubList(start,end);
end = end >= sub.size() ? sub.size() : end;
updateRowData(sub.subList(start, end);, sub);
}
};
provider.addDataDisplay(getTable());
provider.updateRowCount(formList.size(), true);
}
}
private List<Form> getSubList(int start, int end) {
List<Form> filtered_list = null;
if (searchString != null) {
filtered_list= new ArrayList<Form>();
for (Form form : formList) {
if (form.getName().equals(searchString) || form.getTag().equals(searchString) || form.getDescription().equals(searchString))
filtered_list.add(form);
}
}
else
filtered_list = formList;
return filtered_list;
}
can propose another solution what can be used quite easy multiple times.
Idea is to create custom provider for your celltable.
GWT celltable filtering
Video in this post shows it in action.
Here is the part of code of custom list data provider which u have to implement.
#Override
protected void updateRowData(HasData display, int start, List values) {
if (!hasFilter() || filter == null) { // we don't need to filter, so call base class
super.updateRowData(display, start, values);
} else {
int end = start + values.size();
Range range = display.getVisibleRange();
int curStart = range.getStart();
int curLength = range.getLength();
int curEnd = curStart + curLength;
if (start == curStart || (curStart < end && curEnd > start)) {
int realStart = curStart < start ? start : curStart;
int realEnd = curEnd > end ? end : curEnd;
int realLength = realEnd - realStart;
List<t> resulted = new ArrayList<t>(realLength);
for (int i = realStart - start; i < realStart - start + realLength; i++) {
if (filter.isValid((T) values.get(i), getFilter())) {
resulted.add((T) values.get(i));
}
}
display.setRowData(realStart, resulted);
display.setRowCount(resulted.size());
}
}
}