From b6e20e04b519e50909331f537df2ea6114a137ee Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sat, 23 Jul 2016 19:16:28 +0200
Subject: General ui code improvements, moved layout related variables to
 ui::UI, added ColorPicker widget.

---
 src/ui/Makefile.am    |   2 +
 src/ui/bitmap.cc      |   4 ++
 src/ui/colorpicker.cc | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/ui/colorpicker.h  |  71 +++++++++++++++++++++++++++
 src/ui/definitions.h  |   2 -
 src/ui/inputbox.cc    | 107 ++++++++++++++++++++++++++---------------
 src/ui/inputbox.h     |  47 +++++++++++++-----
 src/ui/modelview.cc   |   0
 src/ui/modelview.h    |   0
 src/ui/scrollbar.cc   |   1 +
 src/ui/scrollbar.h    |   8 +--
 src/ui/slider.cc      |   3 +-
 src/ui/slider.h       |   2 +-
 src/ui/ui.cc          |  18 ++++---
 src/ui/ui.h           |   6 ++-
 15 files changed, 336 insertions(+), 66 deletions(-)
 create mode 100644 src/ui/colorpicker.cc
 create mode 100644 src/ui/colorpicker.h
 mode change 100755 => 100644 src/ui/modelview.cc
 mode change 100755 => 100644 src/ui/modelview.h

diff --git a/src/ui/Makefile.am b/src/ui/Makefile.am
index e309dda..340f8fb 100644
--- a/src/ui/Makefile.am
+++ b/src/ui/Makefile.am
@@ -11,6 +11,7 @@ endif
 noinst_HEADERS = \
 	bitmap.h \
 	button.h \
+	colorpicker.h \
 	console.h \
 	definitions.h \
 	font.h \
@@ -34,6 +35,7 @@ noinst_HEADERS = \
 libui_la_SOURCES = \
 	bitmap.cc \
 	button.cc \
+	colorpicker.cc \
 	console.cc \
 	font.cc \
 	iconbutton.cc \
diff --git a/src/ui/bitmap.cc b/src/ui/bitmap.cc
index 5caf966..6befa3a 100644
--- a/src/ui/bitmap.cc
+++ b/src/ui/bitmap.cc
@@ -58,6 +58,10 @@ void Bitmap::draw_background()
 {
 	if (bitmap_texture.size()) {
 		Paint::draw_bitmap(global_location(), size(), bitmap_color, bitmap_texture, bitmap_preserve_aspect);
+	} else {
+		Paint::set_color(bitmap_color);
+		Paint::draw_rectangle(global_location(), size());
+		Paint::set_color(palette()->foreground());
 	}
 }
 
diff --git a/src/ui/colorpicker.cc b/src/ui/colorpicker.cc
new file mode 100644
index 0000000..4180334
--- /dev/null
+++ b/src/ui/colorpicker.cc
@@ -0,0 +1,131 @@
+/*
+   ui/colorpicker.cc
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#include "ui/bitmap.h"
+#include "ui/colorpicker.h"
+#include "ui/slider.h"
+#include "ui/label.h"
+#include "ui/ui.h"
+
+#include "math/functions.h"
+
+namespace ui 
+{
+	
+ColorPicker::ColorPicker(Widget *parent) : Widget(parent)
+{
+	set_label("colorpicker");
+	
+	_label_red = new Label(this, "R");
+	_label_red->set_alignment(AlignLeft | AlignVCenter);
+	_label_red->set_border(false);
+	_label_red->set_background(false);
+	_slider_red = new Slider(this, 0.0f, 255.0f);
+	
+	_label_green = new Label(this, "G");
+	_label_green->set_alignment(AlignLeft | AlignVCenter);
+	_label_green->set_border(false);
+	_label_green->set_background(false);
+	_slider_green = new Slider(this, 0.0f, 255.0f);
+	
+	_label_blue = new Label(this, "B");
+	_label_blue->set_alignment(AlignLeft | AlignVCenter);
+	_label_blue->set_border(false);
+	_label_blue->set_background(false);
+	_slider_blue = new Slider(this, 0.0f, 255.0f);
+	
+	_color_preview = new Bitmap(this);
+	_color_preview->set_label("preview");
+	_color_preview->set_border(true);
+
+	color_changed();
+}
+
+ColorPicker::~ColorPicker()
+{
+}
+
+void ColorPicker::set_color(const math::Color & color)
+{
+	_color.assign(color);
+	color_changed();
+}
+	
+void ColorPicker::set_color(const float r, const float g, const float b)
+{
+	_color.assign(r, g, b);
+	color_changed();
+}
+
+void ColorPicker::color_changed()
+{
+	_slider_red->set_value(_color.red() * 255.0f);
+	_slider_green->set_value(_color.green() * 255.0f);
+	_slider_blue->set_value(_color.blue() * 255.0f);
+	_color_preview->set_color(_color);
+}
+
+void ColorPicker::resize()
+{
+	const float margin = UI::margin;
+	const float w = font()->width() * 3.0f;
+	const float h = (height() - margin * 4.0f) / 3.0f;
+	
+	const float r = math::min(width(), height()) - 2.0f * margin;
+	
+	// resize color preview
+	_color_preview->set_size(r,r);
+	_color_preview->set_location(width() - r - margin, height() - r - margin);
+	
+	// resize red channel label
+	_label_red->set_size(w, h);
+	_label_red->set_location(margin, margin);
+	// resize red channel slider
+	_slider_red->set_location(_label_red->right(), _label_red->top());
+	_slider_red->set_size(_color_preview->left() - _label_red->right() - 2.0f * margin, h);
+	
+	_label_green->set_size(w, h);
+	_label_green->set_location(margin, 2.0f * margin + h);
+	// resize green channel slider
+	_slider_green->set_location(_label_green->right(), _label_green->top());
+	_slider_green->set_size(_color_preview->left() - _label_green->right() - 2.0f * margin, h);
+	
+	_label_blue->set_size(w, h);
+	_label_blue->set_location(margin, 3.0f * margin + 2.0f * h);
+	// resize blue channel slider
+	_slider_blue->set_location(_label_blue->right(), _label_blue->top());
+	_slider_blue->set_size(_color_preview->left() - _label_blue->right() - 2.0f * margin, h);
+}
+
+bool ColorPicker::on_emit(Widget *sender, const Event event, void *data)
+{
+	if (event == ui::Widget::EventSliderChanged)
+	{
+		if (sender == _slider_red)
+		{
+			_color[0] = _slider_red->value() / 255.0f;
+			_color_preview->set_color(_color);
+			return true;
+		}
+		else if (sender == _slider_green)
+		{
+			_color[1] = _slider_green->value() / 255.0f;
+			_color_preview->set_color(_color);
+			return true;
+		}
+		else if (sender == _slider_blue)
+		{
+			_color[2] = _slider_blue->value() / 255.0f;
+			_color_preview->set_color(_color);
+			return true;
+		}	
+	}
+	
+	// unhandled event
+	return false;
+}
+
+}
diff --git a/src/ui/colorpicker.h b/src/ui/colorpicker.h
new file mode 100644
index 0000000..e2c0cb5
--- /dev/null
+++ b/src/ui/colorpicker.h
@@ -0,0 +1,71 @@
+/*
+   ui/colorpicker.h
+   This file is part of the Osirion project and is distributed under
+   the terms of the GNU General Public License version 2
+*/
+
+#ifndef __INCLUDED_UI_COLORPICKER_H__
+#define __INCLUDED_UI_COLORPICKER_H__
+
+#include "ui/widget.h"
+
+namespace ui
+{
+
+class Bitmap;
+class Label;
+class Slider;
+	
+class ColorPicker : public Widget
+{
+public:
+	ColorPicker(Widget *parent);
+	~ColorPicker();
+	
+	/**
+	 * @brief current selected color
+	 * */
+	inline const math::Color color() const {
+		return _color;
+	}
+	
+	/**
+	 * @brief set selected color
+	 * */
+	void set_color(const math::Color & color);
+	
+	/**
+	 * @brief set selected color
+	 * */
+	void set_color(const float r, const float g, const float b);
+	
+protected:
+	/// resize event handler
+	virtual void resize();
+	
+	/**
+	 * @brief emit event handler
+	 * */
+	virtual bool on_emit(ui::Widget *sender, const ui::Widget::Event event, void *data);
+	
+
+private:
+	void color_changed();
+	
+	Label		*_label_red;
+	Slider		*_slider_red;
+	
+	Label		*_label_green;
+	Slider		*_slider_green;
+	
+	Label		*_label_blue;
+	Slider		*_slider_blue;
+	
+	Bitmap		*_color_preview;
+	
+	math::Color	_color;
+};
+
+}
+
+#endif // __INCLUDED_UI_COLORPICKER_H__
diff --git a/src/ui/definitions.h b/src/ui/definitions.h
index 02698f4..19cdf82 100644
--- a/src/ui/definitions.h
+++ b/src/ui/definitions.h
@@ -26,8 +26,6 @@ enum Alignment {
 	AlignCenter	= AlignHCenter | AlignVCenter
 };
 
-const float			 pointer_size = 48.0f;
-
 typedef std::deque<std::string> Text;
 
 }
diff --git a/src/ui/inputbox.cc b/src/ui/inputbox.cc
index 89e3243..a7565e7 100644
--- a/src/ui/inputbox.cc
+++ b/src/ui/inputbox.cc
@@ -4,6 +4,7 @@
    the terms of the GNU General Public License version 2
 */
 
+#include "ui/definitions.h"
 #include "ui/inputbox.h"
 #include "ui/paint.h"
 #include "auxiliary/functions.h"
@@ -15,13 +16,14 @@ namespace ui
 
 InputBox::InputBox(Widget *parent) : Widget(parent)
 {
-	input_text.clear();
-	input_pos = 0;
-	input_max = 512;
+	_text.clear();
+	_pos = 0;
+	_max = 512;
 
 	set_label("input");
 	set_background(false);
 	set_border(false);
+	set_alignment(AlignLeft | AlignTop);
 }
 
 InputBox::~InputBox()
@@ -30,58 +32,75 @@ InputBox::~InputBox()
 
 void InputBox::clear()
 {
-	input_text.clear();
-	input_pos = 0;
+	_text.clear();
+	_pos = 0;
 }
 void InputBox::set_text(std::string const &text)
 {
-	input_text.assign(text);
-	input_pos = input_text.size();
+	_text.assign(text);
+	_pos = _text.size();
 }
 
 void InputBox::set_text(const char *text)
 {
 	if (text)
-		input_text.assign(text);
+		_text.assign(text);
 	else
-		input_text.clear();
-	input_pos = input_text.size();
+		_text.clear();
+	_pos = _text.size();
 }
 
 void InputBox::set_prompt(const std::string &prompt)
 {
-	input_prompt.assign(prompt);
+	_prompt.assign(prompt);
 }
 
 void InputBox::set_prompt(const char *prompt)
 {
 	if (!prompt)
-		input_prompt.clear();
+		_prompt.clear();
 	else
-		input_prompt.assign(prompt);
+		_prompt.assign(prompt);
 }
 
 void InputBox::set_max(const size_t max)
 {
-	input_max = max;
+	_max = max;
+}
+
+void InputBox::set_alignment(const unsigned int alignment)
+{
+	_alignment = alignment;
 }
 
 void InputBox::draw()
 {
+
 	size_t text_width = (size_t) floorf(width() / font()->width());
-	size_t prompt_width = aux::text_length(input_prompt);
+	size_t prompt_width = aux::text_length(_prompt);
 	math::Vector2f v(global_location());
 	Paint::set_color(palette()->text());
+	
+	// Horizontal alignment
+	// FIXME horizontal alignment is not supported
+		
+	// Vertical alignment
+	if (alignment() & ui::AlignVCenter) {
+		v.get_y() += (height() - font()->height()) * 0.5f;
+		
+	} else if (alignment() & ui::AlignBottom) {
+		v.get_y() += height() - font()->height();
+	}
 
 	// draw the prompt
 	if (prompt_width) {
-		Paint::draw_text(v, font(), input_prompt);
+		Paint::draw_text(v, font(), _prompt);
 		v[0] +=  prompt_width * font()->width();
 	}
 	Paint::set_color(palette()->text());
 
 	// draw the part before the cursor
-	std::string firstpart(input_text.substr(0, input_pos));
+	std::string firstpart(_text.substr(0, _pos));
 	size_t draw_width = 0;
 	const char *c = firstpart.c_str();
 
@@ -111,13 +130,13 @@ void InputBox::draw()
 
 	// draw the part behind the cursor
 	v[0] += draw_width * font()->width();
-	if (input_pos < input_text.size()) {
-		if (input_pos > 1 && aux::is_color_code(input_text.c_str() + input_pos - 1)) {
-			Paint::set_system_color(input_text[input_pos]);
+	if (_pos < _text.size()) {
+		if (_pos > 1 && aux::is_color_code(_text.c_str() + _pos - 1)) {
+			Paint::set_system_color(_text[_pos]);
 		}
 		// limit to width
 		std::string secondpart;
-		c = &input_text.c_str()[input_pos];
+		c = &_text.c_str()[_pos];
 		while (*c && (draw_width <= (text_width - prompt_width - 1))) {
 			if (aux::is_color_code(c)) {
 				c++;
@@ -144,58 +163,58 @@ void InputBox::draw()
 
 void InputBox::complete()
 {
-	core::CommandBuffer::complete(input_text, input_pos);
+	core::CommandBuffer::complete(_text, _pos);
 }
 
 bool InputBox::on_keypress(const int key, const unsigned int modifier)
 {
 	switch (key) {
 		case SDLK_HOME:
-			input_pos = 0;
+			_pos = 0;
 			return true;
 			break;
 
 		case SDLK_END:
-			input_pos = input_text.size();
+			_pos = _text.size();
 			return true;
 			break;
 
 		case SDLK_LEFT:
-			if (input_pos > 0)
-				input_pos--;
+			if (_pos > 0)
+				_pos--;
 			return true;
 			break;
 
 		case SDLK_RIGHT:
-			if (input_pos < input_text.size())
-				input_pos++;
+			if (_pos < _text.size())
+				_pos++;
 			return true;
 			break;
 
 		case SDLK_DELETE:
-			if (input_text.size() && input_pos < input_text.size()) {
-				input_text.erase(input_pos, 1);
+			if (_text.size() && _pos < _text.size()) {
+				_text.erase(_pos, 1);
 			}
 			return true;
 			break;
 
 		case SDLK_BACKSPACE:
-			if (input_text.size() && input_pos) {
-				input_text.erase(input_pos - 1, 1);
-				input_pos--;
+			if (_text.size() && _pos) {
+				_text.erase(_pos - 1, 1);
+				_pos--;
 			}
 			return true;
 			break;
 
 		default:
 			if ((key >= 32) && (key < 175)) {
-				if (input_text.size() < input_max) {
+				if (_text.size() < _max) {
 					// TODO bell sound
-					if (input_pos == input_text.size())
-						input_text += (char)key;
+					if (_pos == _text.size())
+						_text += (char)key;
 					else
-						input_text.insert(input_pos, 1, (char)key);
-					input_pos++;
+						_text.insert(_pos, 1, (char)key);
+					_pos++;
 				}
 				return true;
 			}
@@ -204,11 +223,23 @@ bool InputBox::on_keypress(const int key, const unsigned int modifier)
 
 	return false;
 }
+
 bool InputBox::on_keyrelease(const int key, const unsigned int modifier)
 {
 	return false;
 }
 
+bool InputBox::on_mousepress(const unsigned int button)
+{
+	if (button == SDL_BUTTON_LEFT)
+	{
+		set_focus();
+		return true;
+	}
+
+	return false;
+}
+
 }
 
 
diff --git a/src/ui/inputbox.h b/src/ui/inputbox.h
index 5da9bc5..20dd9b5 100644
--- a/src/ui/inputbox.h
+++ b/src/ui/inputbox.h
@@ -18,6 +18,16 @@ class InputBox : public Widget
 public:
 	InputBox(Widget *parent);
 	~InputBox();
+	
+	/// text alignment
+	inline unsigned int alignment() const {
+		return _alignment;
+	}
+	
+	/// return the text displayed by the label
+	inline const std::string &text() const {
+		return _text;
+	}
 
 	/// set the text displayed by the label
 	void set_text(const std::string &text);
@@ -31,14 +41,12 @@ public:
 	/// set the prompt
 	void set_prompt(const char *prompt);
 
-	/// set the maximal input width
+	/// set the maximal input length
 	void set_max(const size_t max);
-
-	/// return the text displayed by the label
-	inline const std::string &text() const {
-		return input_text;
-	}
 	
+	/// set the text alignment
+	void set_alignment(const unsigned int alignment);
+
 	/// clear the text
 	void clear();
 	
@@ -46,21 +54,34 @@ public:
 	void complete();
 
 protected:
-	/// draw the widget
+	/**
+	 * @brief draw the windget
+	 * */
 	virtual void draw();
 
-	/// called when the widget receives a key press
+	/**
+	 * @brief key press event handler
+	 * */
 	virtual bool on_keypress(const int key, const unsigned int modifier);
 
-	/// called when the widget receives a key release
+	/**
+	 * @brief key release event handler
+	 * */
 	virtual bool on_keyrelease(const int key, const unsigned int modifier);
+	
+	/**
+	 * @brief mouse button press event handler
+	 * */
+	virtual bool on_mousepress(const unsigned int button);
 
 private:
 
-	std::string		input_text;
-	std::string		input_prompt;
-	size_t			input_pos;
-	size_t			input_max;
+	std::string		_text;
+	std::string		_prompt;
+	size_t			_pos;
+	size_t			_max;
+	
+	unsigned int		_alignment;
 };
 
 }
diff --git a/src/ui/modelview.cc b/src/ui/modelview.cc
old mode 100755
new mode 100644
diff --git a/src/ui/modelview.h b/src/ui/modelview.h
old mode 100755
new mode 100644
diff --git a/src/ui/scrollbar.cc b/src/ui/scrollbar.cc
index 38410f4..9469b6a 100644
--- a/src/ui/scrollbar.cc
+++ b/src/ui/scrollbar.cc
@@ -5,6 +5,7 @@
 */
 
 #include "math/functions.h"
+#include "ui/button.h"
 #include "ui/paint.h"
 #include "ui/scrollbar.h"
 
diff --git a/src/ui/scrollbar.h b/src/ui/scrollbar.h
index c8eccf9..d2a8bbb 100644
--- a/src/ui/scrollbar.h
+++ b/src/ui/scrollbar.h
@@ -8,14 +8,16 @@
 #define __INCLUDED_UI_SCROLLBAR_H__
 
 #include <string>
-#include "ui/button.h"
+
 #include "ui/widget.h"
 
 namespace ui
 {
+	
+class Button;
 
 /**
- * @brief a scrollbar widget
+ * @brief a scrollbar widget with a vertical layout.
  */
 class ScrollBar : public Widget
 {
@@ -23,7 +25,7 @@ public:
 	ScrollBar(Widget *parent, const float minimum = 0.0f, const float maximum = 1.0f);
 	
 	~ScrollBar();
-
+	
 	/**
 	 * @brief the current slider value
 	 */
diff --git a/src/ui/slider.cc b/src/ui/slider.cc
index ee29f05..1fcaada 100644
--- a/src/ui/slider.cc
+++ b/src/ui/slider.cc
@@ -135,10 +135,11 @@ bool Slider::on_mousepress(const unsigned int button)
 {
 	if (button == SDL_BUTTON_LEFT)
 	{
+		set_focus();
 		if (slider_maximum > slider_minimum)
 		{
 			// TODO position hit test
-			slider_dragging = true;
+			slider_dragging = true;			
 		}
 		return true;
 	}
diff --git a/src/ui/slider.h b/src/ui/slider.h
index 2f71c39..df28b6f 100644
--- a/src/ui/slider.h
+++ b/src/ui/slider.h
@@ -15,7 +15,7 @@ namespace ui
 {
 
 /**
- * @brief a slider widget
+ * @brief a slider widget with a horizontal orientation
  */
 class Slider : public Widget
 {
diff --git a/src/ui/ui.cc b/src/ui/ui.cc
index 1502419..0877519 100644
--- a/src/ui/ui.cc
+++ b/src/ui/ui.cc
@@ -29,8 +29,10 @@ bool UI::ui_debug = false;
 
 math::Vector2f UI::elementsize(256, 32);
 
-float UI::spacing = 16.0f;
-float UI::margin = 8.0f;
+float UI::padding = 24.0f;
+float UI::margin = 16.0f;
+
+float UI::pointer_size = 48.0f;
 
 UI *global_ui = 0;
 
@@ -121,8 +123,9 @@ void UI::load_settings()
 	
 	float w = elementsize.width();
 	float h = elementsize.height();
-	float m = spacing;
-	float s = spacing;
+	float m = margin;
+	float s = padding;
+	float p = pointer_size;
 
 	while (ini.getline()) {
 
@@ -160,8 +163,11 @@ void UI::load_settings()
 				} else if (ini.got_key_float("margin", m)) {
 					margin = m;
 					continue;
-				} else if (ini.got_key_float("spacing", s)) {
-					spacing = s;
+				} else if (ini.got_key_float("pointer", p)) {
+					pointer_size = p;
+					continue;
+				} else if (ini.got_key_float("padding", s)) {
+					padding = s;
 					continue;
 				} else {
 					ini.unknown_key();
diff --git a/src/ui/ui.h b/src/ui/ui.h
index 4b5d2da..aaf4acc 100644
--- a/src/ui/ui.h
+++ b/src/ui/ui.h
@@ -98,15 +98,17 @@ public:
 	 * */
 	static math::Vector2f	elementsize;
 	/**
-	 * global spacing between ui elements, used by resize() functions
+	 * global padding between ui elements, used by resize() functions
 	 * */
-	static float		spacing;
+	static float		padding;
 	/**
 	 * global margin for frames and widgets, used by resize() functions
 	 * see @Widget::resize();
 	 * */
 	static float		margin;
 	
+	static float		pointer_size;
+	
 
 protected:
 	/* -- event handlers --------------------------------------- */
-- 
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