How Do I Create an iOS Modal Pickwheel in a column?
This Lesson presents how to create a column containing an iOS Modal Pickwheel control in a datagrid, using the Data Grid Helper Plugin.
Opening Columns Builder
First, drag a datagrid onto a stack and double click on it to open the Data Grid Helper (DGH) Properties Palette.
Click the "Edit..." button to open Columns Builder.
Building Columns in the Columns Builder Preview
Click the (+) button and add two columns.
Name the last column "Pickwheel".
Pickwheel Creation Using Custom Objects and Column Content
Open the Custom Objects, Columns Builder Properties topic (1)
Double click on the "Pickwheel" header (2) to open the Column Content (3)
Next, drag the iOS Modal Pickwheel image from the Column Builder Properties and drop it in the Column Content Area (4)
Update Columns Builder Preview
Click the Update button to refresh the Column Builder Preview content (1).
A field named "_ColumnData_" will also be automatically added in the Column Content.
Remove this field by selecting it's name in the Object List of the Column Content Area (2), after the field is selected in the Column Content, on your keyboard, press the Delete or suppr key.
Editing The Pickwheel Field
Double clicking on the Pickwheel field in the Column Content, will open the Properties Inspector.
Enter a name for this pickwheel field. Default name is "Field". Example: myFirstPickwheel.
Close the inspector, then update the columns builder preview again by clicking on the update button.
Using DGH To Build The Required Script
DGH can now build the required script for managing this iOS pickwheel according to the column data.
Click the Script Editor icon and select the "Build Script" menu.
Confirm Script Updating
Click the "Update" button to update the script of the column.
Confirming the warning message
Click the "Erase" button to replace the column default script with the script built by DGH.
Editing The Pickwheel items in the Pickwheel's column script
Click the Script Editor icon and select the "Edit Script" menu.
Content for the pickwheel is added by DGH in the EditValue handler.
In the EditValue handler, locate this line:
put "Item 1" & cr & "Item 2" & cr & "Item 3" & cr & "item 4" into tThePickList ## Add your list here
And replace it by:
put "myFirstItem" & cr & "mySecondItem" & cr & "myThirdItem" into tThePickList ## Add your list here
Apply the script's change by clicking on the Apply button of the Script Editor.
Update Column Content Then Apply The Column Builder Preview To The DataGrid
After the script is built, update the DataGrid Preview, by clicking the "Update" button.
Then, click on the "Apply" button to apply the modifications to the selected DataGrid (1).
Adding some data to the datagrid
Before to test the result in the Simulator, add some data in the Col1 column by using the "Contents" topic of the LiveCode's Property Inspector.
Separate data of each line by a return, then press enter to update the Datagrid's content.
Changing the Data Grid Appareance by Applying the iOS Preset
In the DGH's "Table properties", click on the DataGrid Preset's Apply button to change the datagrid appareance.
Testing The Result in the Simulator
To test the result, open the Simulator and click on the Pickwheel column's content, then select a value in the Pickwheel
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