1 ACCEPTED SOLUTION
Accepted Solutions
Hi Gaetan
Thanks for getting back to me.
Sometimes defining the problem becomes part of the problem.
The project is running on the STM32F429 DISC1 board. It uses FreeRTOS
I am using an amended form of the customKeyboard example in one of the TouchGFX demo projects. However, I have shortened the space bar and edited the keyboard to include an OK (tick) button and a cancel button.
These are part of the keyboard, not external buttons like in the demo project. I am taking this approach as my display is 320*240, as is the keyboard.
The code snippet shows what I want to do. However, lines 14 onwards are all executed while the keyboard is visible, so nothing is copied into the text area. I want this function to wait until the keyboard is cleared and the buffer contains the entered text. Waiting for the keyboard to clear and the buffer filled would not be an issue as the RTOS scheduler could switch to other tasks if needed.
Code is greatly abridged to save space. There are multiple text fields.
void SettingsScreenView::FlexDatafieldClicked()
{
/* Show the keyboard*/
keyboard.setVisible (true);
keyboard.invalidate();
/*keyboard is displayed and allows text entry*/
/*clicking on enter key (part of keyboard)*/
/*This is the code that should ideally run AFTER keyboard is hidden */
/* Copy keyboard buffer into datafield buffer*/
if (strlen(returnBuffer) != 0)
{
Unicode::strncpy(textAreaDatafieldBuffer, keyboard.getBuffer(), TEXTAREADATAFIELD_SIZE);
}
/*Convert Unicode textbuffer to char buffer*/
/* then save data to model via presenter*/
int i = 0;
do
{
txtBuf[i] = (char) textAreaDatafieldBuffer[i];
i++;
} while (textAreaDatafieldBuffer[i] != 0);
memset(txtBuf, '\0', TEXTAREADATAFIELD_SIZE);
presenter->saveDatafield(txtBuf);
textAreaDatafield.invalidate();
keyboard.clearBuffer();
}
The code below works, but this is an awkward fix, making the user see nothing returned from the keyboard until they click on the text area to be populated. Again there are lots of settings fields and this will be confusing.
/* This is the somewhat inelligant workaround*/
/*First an 'AddEdit' Flex button is used to open the keyboard*/
void SettingsScreenView::AddEditClicked()
{
keyboard.setVisible (true);
keyboard.invalidate();
/* a flex button (Alpha 0) is activated over the Datafield textarea*/
flexButtonDatafield.setVisible(true);
flexButtonDatafield.invalidate();
/*AddEdit button is hidden*/
Add_Edit_Button.setVisible(false);
Add_Edit_Button.invalidate();
/*text area */
textAreaDatafield.setVisible(true);
textAreaDatafield.invalidate();
}
/*Once keyboard entry is complete and keyboard is hidden*/
/*the flex button over the target field is clicked*/
/*Now the keyboard bufffer, which is still intact WILL copy into the data field*/
void SettingsScreenView::Edit1Clicked()
{
Unicode::strncpy(textAreaMem1Buffer, keyboard.getBuffer(), TEXTAREAMEM1_SIZE);
//Convert Unicode textbuffer to char buffer for saving in Model
int i = 0;
do
{
txtBuf[i] = (char) textAreaMem1Buffer[i];
i++;
} while (textAreaMem1Buffer[i] != 0);
presenter->saveDatafield(txtBuf, 1);
memset(txtBuf, '\0', TEXTAREAMEM1_SIZE);
keyboard.clearBuffer();
}
Is there a way to conveniently pause the first example until the keyboard entry is complete? The keyboard is an object of class CustomKeyboard, which is made visible via a flex button on the screen and normally hidden by the external buttons. The second method above emulates this external button idea, but hides the keyboard from within the keyboard code. Would a semaphore work here? I am also using the keyboard from other screens.
I hope this gives enough clarity.
Regards
Ken
