apps/deskcalc/ExpressionTextView.cpp

103 	// If changes where not applied the value has become a new expression
195 ExpressionTextView::SetValue(BString value, BString decimalSeparator)
197 	// save the value
198 	fCurrentValue = value;
204 	float stringWidth = font.StringWidth(value);
211 	if (value.CountChars() > 3 && stringWidth > viewWidth) {
214 		if (value[0] == '-')
217 		// calculate the value of the exponent
219 		int32 offset = value.FindFirst(decimalSeparator);
221 			exponent = value.CountChars() - decimalSeparatorWidth - firstDigit;
222 			value.InsertChars(decimalSeparator, firstDigit + 1);
225 				// if the value is 0.01 or larger then scientific notation
227 				if (value[firstDigit] != '0' || value[firstDigit + 2] != '0'
228 					|| value[firstDigit + 3] != '0') {
232 					value.Remove(offset, decimalSeparatorWidth);
234 					// check for negative exponent value
236 					while (value[firstDigit] == '0') {
237 						value.Remove(firstDigit, 1);
242 					value.InsertChars(decimalSeparator, firstDigit + 1);
247 				BString temp = value;
254 					value.Remove(offset, decimalSeparatorWidth);
255 					value.InsertChars(decimalSeparator, firstDigit + 1);
263 			value.Truncate(40);
266 			offset = value.CountChars() - 1;
267 			value << "E" << exponent;
270 			offset = value.CountChars() - 1;
274 		stringWidth = font.StringWidth(value);
277 			if (value.CharAt(offset) != decimalSeparator)
278 				lastRemovedDigit = value[offset];
279 			value.Remove(offset--, 1);
280 			stringWidth = font.StringWidth(value);
284 		if (value.CharAt(offset) == decimalSeparator) {
285 			value.Remove(offset, decimalSeparatorWidth);
293 				if (value.CharAt(offset) == decimalSeparator)
296 				digit = (int)(value[offset]) - '0' + 1; // ascii to int + 1
300 				value.SetByteAt(offset, '0');
304 				if (value.CharAt(firstDigit + 1) == decimalSeparator) {
305 					value.SetByteAt(firstDigit + decimalSeparatorWidth, '0');
306 					value.RemoveChars(firstDigit, decimalSeparatorWidth);
307 					value.InsertChars(decimalSeparator, firstDigit);
309 				value.Insert('1', 1, firstDigit);
311 				// remove the exponent value and the last digit
312 				offset = value.FindFirst('E');
314 					offset = value.CountChars();
316 				value.Truncate(--offset);
321 				value << 'E' << exponent;
323 				// increase the current digit value with one
324 				value.SetByteAt(offset, char(digit + 48));
327 				offset = value.FindFirst('E');
329 					offset = value.CountChars();
336 		if (value.FindFirst(decimalSeparator) != B_ERROR) {
338 			while (value[offset] == '0')
339 				value.Remove(offset--, 1);
342 			if (value.CharAt(offset) == decimalSeparator)
343 				value.Remove(offset, decimalSeparatorWidth);
347 	// set the new value
348 	SetExpression(value);