char* alphaShowDialogue(void)
{
char result;
/* These need to be instantiated here since the width and height of
the lcd is retrieved dynamically depending on screen orientation */
alphaBtnX[0] = ALPHA_COL1_LEFT;
alphaBtnX[1] = ALPHA_COL2_LEFT;
alphaBtnX[2] = ALPHA_COL3_LEFT;
alphaBtnX[3] = ALPHA_COL4_LEFT;
alphaBtnX[4] = ALPHA_COL5_LEFT;
alphaBtnY[0] = ALPHA_ROW1_TOP;
alphaBtnY[1] = ALPHA_ROW2_TOP;
alphaBtnY[2] = ALPHA_ROW3_TOP;
alphaBtnY[3] = ALPHA_ROW4_TOP;
alphaBtnY[4] = ALPHA_ROW5_TOP;
alphaBtnY[5] = ALPHA_ROW6_TOP;
/* Initialise the string buffer */
memset(&alphaString[0], 0, sizeof(alphaString));
alphaString_ptr = alphaString;
alphaPage = 0;
/* Draw the background and render the buttons */
drawFill(ALPHA_COLOR_BACKGROUND);
alphaRefreshScreen();
/* Capture results until the 'OK' button is pressed */
while(1)
{
result = alphaHandleTouchEvent();
if (result == '>') return (char *)&alphaString;
}
}
char* alphaShowDialogue(void)
{
char result;
/* These need to be instantiated here since the width and height of
the lcd is retrieved dynamically depending on screen orientation */
alphaBtnX[0] = ALPHA_COL1_LEFT;
alphaBtnX[1] = ALPHA_COL2_LEFT;
alphaBtnX[2] = ALPHA_COL3_LEFT;
alphaBtnX[3] = ALPHA_COL4_LEFT;
alphaBtnX[4] = ALPHA_COL5_LEFT;
alphaBtnY[0] = ALPHA_ROW1_TOP;
alphaBtnY[1] = ALPHA_ROW2_TOP;
alphaBtnY[2] = ALPHA_ROW3_TOP;
alphaBtnY[3] = ALPHA_ROW4_TOP;
alphaBtnY[4] = ALPHA_ROW5_TOP;
alphaBtnY[5] = ALPHA_ROW6_TOP;
/* Initialise the string buffer */
memset(&alphaString[0], 0, sizeof(alphaString));
alphaString_ptr = alphaString;
alphaPage = 0;
/* Draw the background and render the buttons */
drawFill(COLOR_WHITE);
drawRectangleFilled(0, ALPHA_KEYPAD_TOP - ALPHA_BTN_SPACING, lcdGetWidth() - 1, lcdGetHeight() - 1, COLOR_DARKGRAY);
drawLine(0, (ALPHA_KEYPAD_TOP - ALPHA_BTN_SPACING) + 1, lcdGetWidth() - 1, (ALPHA_KEYPAD_TOP - ALPHA_BTN_SPACING) + 1, COLOR_LIGHTGRAY);
alphaRefreshScreen();
/* Capture results until the 'OK' button is pressed */
while(1)
{
result = alphaHandleTouchEvent();
if (result == '>') return (char *)&alphaString;
}
}
char alphaHandleTouchEvent(void)
{
tsTouchData_t data;
char result = '\0';
uint8_t row, col;
int32_t tsError = -1;
// Blocking delay until a valie touch event occurs
while (tsError)
{
tsError = tsWaitForEvent(&data, 0);
}
// Attempt to convert touch data to char
if ((data.y < ALPHA_ROW1_TOP) || (data.y > ALPHA_ROW6_TOP + ALPHA_BTN_HEIGHT))
{
return result;
}
// Get column
if ((data.x > alphaBtnX[0]) && (data.x < alphaBtnX[0] + ALPHA_BTN_WIDTH))
col = 0;
else if ((data.x > alphaBtnX[1]) && (data.x < alphaBtnX[1] + ALPHA_BTN_WIDTH))
col = 1;
else if ((data.x > alphaBtnX[2]) && (data.x < alphaBtnX[2] + ALPHA_BTN_WIDTH))
col = 2;
else if ((data.x > alphaBtnX[3]) && (data.x < alphaBtnX[3] + ALPHA_BTN_WIDTH))
col = 3;
else if ((data.x > ALPHA_COL5_LEFT) && (data.x < ALPHA_COL5_LEFT + ALPHA_BTN_WIDTH))
col = 4;
else
return result;
// Get row
if ((data.y > ALPHA_ROW1_TOP) && (data.y < ALPHA_ROW1_TOP + ALPHA_BTN_HEIGHT))
row = 0;
else if ((data.y > ALPHA_ROW2_TOP) && (data.y < ALPHA_ROW2_TOP + ALPHA_BTN_HEIGHT))
row = 1;
else if ((data.y > ALPHA_ROW3_TOP) && (data.y < ALPHA_ROW3_TOP + ALPHA_BTN_HEIGHT))
row = 2;
else if ((data.y > ALPHA_ROW4_TOP) && (data.y < ALPHA_ROW4_TOP + ALPHA_BTN_HEIGHT))
row = 3;
else if ((data.y > ALPHA_ROW5_TOP) && (data.y < ALPHA_ROW5_TOP + ALPHA_BTN_HEIGHT))
row = 4;
else if ((data.y > ALPHA_ROW6_TOP) && (data.y < ALPHA_ROW6_TOP + ALPHA_BTN_HEIGHT))
row = 5;
else
return result;
// Match found ... update button and process the results
alphaRenderButton(alphaPage, col, row, true);
result = alphaKeys[alphaPage][row][col];
if (result == '<')
{
// Trim character if backspace was pressed
if (alphaString_ptr > alphaString)
{
alphaString_ptr--;
*alphaString_ptr = '\0';
}
}
else if (result == '*')
{
// Switch page if the shift button was pressed
alphaPage++;
if (alphaPage > 3)
{
alphaPage = 0;
}
// Update the UI
alphaRefreshScreen();
}
else if (result == '>')
{
// OK button
systickDelay(CFG_TFTLCD_TS_KEYPADDELAY);
return '>';
}
else
{
// Add text to string buffer
*alphaString_ptr++ = result;
}
// Brief delay
systickDelay(CFG_TFTLCD_TS_KEYPADDELAY);
// Return button to deselected state
alphaRefreshScreen();
return result;
}
