[GLE-devel] [PATCH] Percent Number Formatter

[Brandon A. <br...@au...>]

Hey again,

I have another patch that I'm submitting for inclusion that I think
will be useful.  Often people have values between 0 and 1 that
represent proportions that can be shown as percentage values.  ie,
0.35 -> 35%.  This patch adds an option to the format string that is
"percent x" where x is the number of decimal places.  It works just
like the fix option except it multiples the value by 100 and sticks a
% at the end.

-Brandon

---
 src/gle/numberformat.cpp |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/src/gle/numberformat.cpp b/src/gle/numberformat.cpp
index f192590..7abb375 100644
--- a/src/gle/numberformat.cpp
+++ b/src/gle/numberformat.cpp
@@ -79,6 +79,15 @@ public:
 	virtual void format(double number, string* output);
 };

+class GLENumberFormatterPercent : public GLENumberFormatter {
+protected:
+	int m_NbDecPlaces;
+public:
+	virtual ~GLENumberFormatterPercent();
+	virtual void parseOptions(GLENumberFormat* format);
+	virtual void format(double number, string* output);
+};
+
 class GLENumberFormatterRound : public GLENumberFormatter {
 protected:
 	int m_Sig;
@@ -308,6 +317,22 @@ void GLENumberFormatterFix::format(double number,
string* output) {
 	doAll(output);
 }

+GLENumberFormatterPercent::~GLENumberFormatterPercent() {
+}
+
+void GLENumberFormatterPercent::parseOptions(GLENumberFormat* format) {
+	m_NbDecPlaces = format->nextInt();
+}
+
+void GLENumberFormatterPercent::format(double number, string* output) {
+	char format[20], result[100];
+	sprintf(format, "%%.%df", m_NbDecPlaces);
+	sprintf(result, format, 100*number);
+	*output = result;
+	*output += "%";
+	doAll(output);
+}
+
 GLENumberFormatterSci::GLENumberFormatterSci() {
 	m_Mode = GLE_NF_SCI_SMALL_E;
 	m_HasExpDigits = false;
@@ -666,6 +691,9 @@ GLENumberFormat::GLENumberFormat(const string& formats) :
 		if (name == "fix") {
 			incTokens();
 			format = new GLENumberFormatterFix();
+		} else if (name == "percent") {
+			incTokens();
+			format = new GLENumberFormatterPercent();
 		} else if (name == "dec") {
 			incTokens();
 			format = new GLENumberFormatterInt(GLE_NF_INT_DEC);
-- 
1.7.5.4