From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 20 Sep 2009 16:27:08 +0000 (+0000)
Subject: Add Text class with multiline support
X-Git-Tag: 1.1~1
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgltk.git;a=commitdiff_plain;h=1e06dc208a02e68cf1bb127927e3ad5af3657c58

Add Text class with multiline support
Use said class in widgets containing text
Support for displaying tooltips in the Root widget
---

diff --git a/source/button.cpp b/source/button.cpp
index aecfd32..c9bca9a 100644
--- a/source/button.cpp
+++ b/source/button.cpp
@@ -14,11 +14,12 @@ namespace GLtk {
 
 Button::Button(const Resources &r, const std::string &t):
 	Widget(r),
+	text(style),
 	icon(0),
 	pressed(false)
 {
-	set_text(t);
 	update_style();
+	set_text(t);
 }
 
 void Button::set_text(const std::string &t)
@@ -66,7 +67,8 @@ void Button::pointer_motion(int x, int y)
 void Button::render_special(const Part &part) const
 {
 	if(part.get_name()=="text")
-		render_text(part, text);
+		//render_text(part, text);
+		text.render(part, geom);
 	if(part.get_name()=="icon" && icon)
 	{
 		Geometry rgeom;
@@ -95,12 +97,12 @@ void Button::render_special(const Part &part) const
 Button::Loader::Loader(Button &btn):
 	Widget::Loader(btn)
 {
-	add("text", &Button::text);
+	add("text", &Loader::text);
 }
 
-Button &Button::Loader::get_object() const
+void Button::Loader::text(const std::string &t)
 {
-	return static_cast<Button &>(wdg);
+	static_cast<Button &>(wdg).text=t;
 }
 
 } // namespace GLtk
diff --git a/source/button.h b/source/button.h
index d13a4c0..31d87e1 100644
--- a/source/button.h
+++ b/source/button.h
@@ -10,6 +10,7 @@ Distributed under the LGPL
 
 #include <sigc++/sigc++.h>
 #include <msp/gl/texture2d.h>
+#include "text.h"
 #include "widget.h"
 
 namespace Msp {
@@ -26,11 +27,12 @@ public:
 	{
 	public:
 		Loader(Button &);
-		Button &get_object() const;
+	private:
+		void text(const std::string &);
 	};
 
 private:
-	std::string text;
+	Text text;
 	const GL::Texture2D *icon;
 	bool pressed;
 
diff --git a/source/dropdown.cpp b/source/dropdown.cpp
index cbd7ee4..5e19ed9 100644
--- a/source/dropdown.cpp
+++ b/source/dropdown.cpp
@@ -11,6 +11,7 @@ Distributed under the LGPL
 #include "panel.h"
 #include "part.h"
 #include "style.h"
+#include "text.h"
 
 using namespace std;
 
@@ -98,7 +99,8 @@ void Dropdown::render_special(const Part &part) const
 	if(part.get_name()=="text")
 	{
 		if(list.get_selected_index()>=0)
-			render_text(part, list.get_selected());
+			Text(style, list.get_selected()).render(part, geom);
+			//render_text(part, list.get_selected());
 	}
 	else if(part.get_name()=="list" && dropped)
 		list.render();
diff --git a/source/entry.cpp b/source/entry.cpp
index 523fea5..f503721 100644
--- a/source/entry.cpp
+++ b/source/entry.cpp
@@ -16,17 +16,16 @@ Distributed under the LGPL
 
 using namespace std;
 
-#include <iostream>
-
 namespace Msp {
 namespace GLtk {
 
 Entry::Entry(const Resources &r, const string &t):
 	Widget(r),
-	text(t),
-	edit_pos(text.size())
+	text(style),
+	edit_pos(0)
 {
 	update_style();
+	set_text(t);
 }
 
 void Entry::set_text(const string &t)
@@ -64,7 +63,7 @@ void Entry::key_press(unsigned key, unsigned, wchar_t ch)
 void Entry::render_special(const Part &part) const
 {
 	if(part.get_name()=="text")
-		render_text(part, text);
+		text.render(part, geom);
 	else if(part.get_name()=="cursor")
 	{
 		if(!part.get_graphic(state))
@@ -74,8 +73,8 @@ void Entry::render_special(const Part &part) const
 		const float font_size=font->get_default_size();
 
 		Geometry rgeom=part.get_geometry();
-		rgeom.x=static_cast<unsigned>(font->get_string_width(text.substr(0, edit_pos))*font_size);
-		rgeom.w=static_cast<unsigned>(font->get_string_width(text)*font_size);
+		rgeom.x=static_cast<unsigned>(font->get_string_width(text.get().substr(0, edit_pos))*font_size);
+		rgeom.w=static_cast<unsigned>(font->get_string_width(text.get())*font_size);
 		part.get_alignment().apply(rgeom, geom, part.get_margin());
 
 		GL::push_matrix();
diff --git a/source/entry.h b/source/entry.h
index 29fec41..b8bae56 100644
--- a/source/entry.h
+++ b/source/entry.h
@@ -8,6 +8,7 @@ Distributed under the LGPL
 #ifndef MSP_GLTK_ENTRY_H_
 #define MSP_GLTK_ENTRY_H_
 
+#include "text.h"
 #include "widget.h"
 
 namespace Msp {
@@ -31,7 +32,7 @@ public:
 	};
 
 private:
-	std::string text;
+	Text text;
 	unsigned edit_pos;
 
 public:
@@ -40,7 +41,7 @@ public:
 	Entry(const Resources &, const std::string & =std::string());
 
 	void set_text(const std::string &);
-	const std::string &get_text() const { return text; }
+	const std::string &get_text() const { return text.get(); }
 
 	virtual void key_press(unsigned, unsigned, wchar_t);
 private:
diff --git a/source/label.cpp b/source/label.cpp
index 0e0134d..ae821a8 100644
--- a/source/label.cpp
+++ b/source/label.cpp
@@ -7,18 +7,40 @@ Distributed under the LGPL
 
 #include "label.h"
 #include "part.h"
+#include "style.h"
+
+using namespace std;
 
 namespace Msp {
 namespace GLtk {
 
-Label::Label(const Resources &r, const std::string &t):
-	Widget(r)
+Label::Label(const Resources &r, const string &t):
+	Widget(r),
+	text(style)
 {
-	set_text(t);
 	update_style();
+	set_text(t);
+}
+
+void Label::autosize()
+{
+	const list<Part> &parts=style->get_parts();
+	const Part *text_part=0;
+	for(list<Part>::const_iterator i=parts.begin(); (!text_part && i!=parts.end()); ++i)
+		if(i->get_name()=="text")
+			text_part=&*i;
+
+	geom.h=text.get_height();
+	geom.w=text.get_width();
+	if(text_part)
+	{
+		const Sides &margin=text_part->get_margin();
+		geom.w+=margin.left+margin.right;
+		geom.h+=margin.top+margin.bottom;
+	}
 }
 
-void Label::set_text(const std::string &t)
+void Label::set_text(const string &t)
 {
 	text=t;
 }
@@ -26,19 +48,19 @@ void Label::set_text(const std::string &t)
 void Label::render_special(const Part &part) const
 {
 	if(part.get_name()=="text")
-		render_text(part, text);
+		text.render(part, geom);
 }
 
 
 Label::Loader::Loader(Label &l):
 	Widget::Loader(l)
 {
-	add("text", &Label::text);
+	add("text", &Loader::text);
 }
 
-Label &Label::Loader::get_object()
+void Label::Loader::text(const string &t)
 {
-	return static_cast<Label &>(wdg);
+	static_cast<Label &>(wdg).text=t;
 }
 
 } // namespace GLtk
diff --git a/source/label.h b/source/label.h
index baa0ddc..f492006 100644
--- a/source/label.h
+++ b/source/label.h
@@ -8,6 +8,7 @@ Distributed under the LGPL
 #ifndef MSP_GLTK_LABEL_H_
 #define MSP_GLTK_LABEL_H_
 
+#include "text.h"
 #include "widget.h"
 
 namespace Msp {
@@ -23,14 +24,17 @@ public:
 	{
 	public:
 		Loader(Label &);
-		Label &get_object();
+	private:
+		void text(const std::string &);
 	};
 
 private:
-	std::string text;
+	Text text;
 
 public:
 	Label(const Resources &, const std::string & =std::string());
+
+	virtual void autosize();
 	void set_text(const std::string &);
 
 private:
diff --git a/source/panel.h b/source/panel.h
index b431a85..8a5d128 100644
--- a/source/panel.h
+++ b/source/panel.h
@@ -35,7 +35,7 @@ public:
 		void panel(const std::string &);
 	};
 
-private:
+protected:
 	struct Child: public Container::Child
 	{
 		Child(Panel &, Widget *);
@@ -66,7 +66,7 @@ public:
 	virtual void key_press(unsigned, unsigned, wchar_t);
 	virtual void key_release(unsigned, unsigned);
 	virtual void focus_out();
-private:
+protected:
 	virtual const char *get_class() const { return "panel"; }
 	virtual void render_special(const Part &) const;
 	virtual Child *create_child(Widget *);
diff --git a/source/root.cpp b/source/root.cpp
index 6bc5793..0cd7e0f 100644
--- a/source/root.cpp
+++ b/source/root.cpp
@@ -6,6 +6,10 @@ Distributed under the LGPL
 */
 
 #include <msp/input/keys.h>
+#include <msp/time/units.h>
+#include <msp/time/utils.h>
+#include "label.h"
+#include "style.h"
 #include "root.h"
 
 namespace Msp {
@@ -14,7 +18,9 @@ namespace GLtk {
 Root::Root(const Resources &r, Graphics::Window &w):
 	Widget(r),
 	Panel(r),
-	window(w)
+	window(w),
+	lbl_tooltip(0),
+	tooltip_target(0)
 {
 	set_geometry(Geometry(0, 0, window.get_width(), window.get_height()));
 
@@ -27,6 +33,44 @@ Root::Root(const Resources &r, Graphics::Window &w):
 	window.signal_key_release.connect(sigc::mem_fun(this, &Root::key_release_event));
 }
 
+void Root::tick()
+{
+	if(tooltip_timeout && Time::now()>tooltip_timeout)
+	{
+		if(Widget *wdg=get_descendant_at(pointer_x, pointer_y))
+		{
+			const std::string &tip=wdg->get_tooltip();
+			if(!tip.empty())
+			{
+				if(!lbl_tooltip)
+				{
+					lbl_tooltip=new Label(res);
+					add(*lbl_tooltip);
+					lbl_tooltip->set_style("tooltip");
+				}
+
+				lbl_tooltip->set_text(tip);
+				lbl_tooltip->autosize();
+				const Geometry &tip_geom=lbl_tooltip->get_geometry();
+				unsigned x=pointer_x+10;
+				unsigned y=pointer_y-10-lbl_tooltip->get_geometry().h;
+				if(x+tip_geom.w>geom.w)
+				{
+					if(pointer_x>static_cast<int>(tip_geom.w+2))
+						x=pointer_x-2-tip_geom.w;
+					else
+						x=geom.w-tip_geom.w;
+				}
+				lbl_tooltip->set_position(x, y);
+				raise(*lbl_tooltip);
+				lbl_tooltip->set_visible(true);
+				tooltip_timeout=Time::TimeStamp();
+				tooltip_target=wdg;
+			}
+		}
+	}
+}
+
 void Root::button_press_event(int x, int y, unsigned btn, unsigned)
 {
 	if(visible)
@@ -51,6 +95,23 @@ void Root::pointer_motion_event(int x, int y)
 	{
 		translate_coords(x, y);
 		pointer_motion(x, y);
+
+		if(!tooltip_target)
+		{
+			if(pointer_focus)
+			{
+				pointer_x=x;
+				pointer_y=y;
+				tooltip_timeout=Time::now()+700*Time::msec;
+			}
+			else
+				tooltip_timeout=Time::TimeStamp();
+		}
+		else if(get_descendant_at(x, y)!=tooltip_target)
+		{
+			lbl_tooltip->set_visible(false);
+			tooltip_target=0;
+		}
 	}
 }
 
diff --git a/source/root.h b/source/root.h
index 36efba7..7cbd827 100644
--- a/source/root.h
+++ b/source/root.h
@@ -10,11 +10,14 @@ Distributed under the LGPL
 
 #include <sigc++/trackable.h>
 #include <msp/gbase/window.h>
+#include <msp/time/timestamp.h>
 #include "panel.h"
 
 namespace Msp {
 namespace GLtk {
 
+class Label;
+
 /**
 A Root is a special type of Panel that covers and entire Window and accepts
 input from it.  When created, a Root widget will take its size from the window
@@ -25,9 +28,15 @@ class Root: public Panel, public sigc::trackable
 {
 private:
 	Graphics::Window &window;
+	Label *lbl_tooltip;
+	int pointer_x;
+	int pointer_y;
+	Msp::Time::TimeStamp tooltip_timeout;
+	Widget *tooltip_target;
 
 public:
 	Root(const Resources &, Graphics::Window &);
+	void tick();
 private:
 	virtual const char *get_class() const { return "root"; }
 	void button_press_event(int, int, unsigned, unsigned);
diff --git a/source/text.cpp b/source/text.cpp
new file mode 100644
index 0000000..5f4095e
--- /dev/null
+++ b/source/text.cpp
@@ -0,0 +1,112 @@
+#include <msp/gl/immediate.h>
+#include <msp/gl/matrix.h>
+#include "style.h"
+#include "text.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GLtk {
+
+Text::Text(const Style *const &s):
+	style(s)
+{ }
+
+Text::Text(const Style *const &s, const string &t):
+	style(s)
+{
+	set(t);
+}
+
+unsigned Text::get_width() const
+{
+	unsigned width=0;
+	for(vector<Line>::const_iterator i=lines.begin(); i!=lines.end(); ++i)
+		width=max(width, i->width);
+	return width;
+}
+
+unsigned Text::get_height() const
+{
+	const GL::Font *font=style->get_font();
+	float font_size=font->get_default_size();
+	unsigned line_height=static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
+	unsigned line_spacing=line_height*6/5;
+	return line_height+(lines.size()-1)*line_spacing;
+}
+
+void Text::set(const string &t)
+{
+	text=t;
+	lines.clear();
+	float font_size=style->get_font()->get_default_size();
+	unsigned start=0;
+	while(1)
+	{
+		unsigned newline=text.find('\n', start);
+
+		Line line;
+		line.start=start;
+		line.length=(newline==string::npos ? text.size() : newline)-start;
+		line.width=static_cast<unsigned>(style->get_font()->get_string_width(text.substr(line.start, line.length))*font_size);
+		lines.push_back(line);
+
+		if(newline==string::npos)
+			break;
+		start=newline+1;
+	}
+}
+
+void Text::erase(unsigned pos, unsigned len)
+{
+	text.erase(pos, len);
+}
+
+void Text::insert(unsigned pos, const string &s)
+{
+	text.insert(pos, s);
+}
+
+void Text::render(const Part &part, const Geometry &geom) const
+{
+	if(lines.empty())
+		return;
+
+	const GL::Font *font=style->get_font();
+	float font_size=font->get_default_size();
+	unsigned line_height=static_cast<unsigned>((font->get_ascent()-font->get_descent())*font_size);
+	unsigned line_spacing=font_size*6/5;
+	unsigned height=line_height+(lines.size()-1)*line_spacing;
+	int y_offset=static_cast<int>(-font->get_descent()*font_size);
+
+	const GL::Color &color=style->get_font_color();
+	GL::Immediate imm((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2));
+	imm.color(color.r, color.g, color.b);
+	for(unsigned i=0; i<lines.size(); ++i)
+	{
+		const Line &line=lines[i];
+
+		Geometry rgeom;
+		rgeom.w=line.width;
+		rgeom.h=height;
+		rgeom.y=(lines.size()-1-i)*line_spacing+y_offset;
+		part.get_alignment().apply(rgeom, geom, part.get_margin());
+
+		GL::push_matrix();
+		GL::translate(rgeom.x, rgeom.y, 0);
+		GL::scale_uniform(font_size);
+
+		font->draw_string(text.substr(line.start, line.length), imm);
+
+		GL::pop_matrix();
+	}
+}
+
+Text &Text::operator=(const string &t)
+{
+	set(t);
+	return *this;
+}
+
+} // namespace GLtk
+} // namespace Msp
diff --git a/source/text.h b/source/text.h
new file mode 100644
index 0000000..46bd18f
--- /dev/null
+++ b/source/text.h
@@ -0,0 +1,53 @@
+#ifndef MSP_GLTK_TEXT_H_
+#define MSP_GLTK_TEXT_H_
+
+#include <string>
+#include <vector>
+
+namespace Msp {
+namespace GLtk {
+
+class Geometry;
+class Part;
+class Style;
+
+/**
+Stores and renders text.  Supports multiline text.
+*/
+class Text
+{
+private:
+	struct Line
+	{
+		unsigned start;
+		unsigned length;
+		unsigned width;
+	};
+
+	const Style *const &style;
+	std::string text;
+	std::vector<Line> lines;
+
+public:
+	Text(const Style *const &);
+	Text(const Style *const &, const std::string &);
+
+	unsigned get_width() const;
+	unsigned get_height() const;
+
+	void set(const std::string &);
+	void erase(unsigned, unsigned);
+	void insert(unsigned, const std::string &);
+	const std::string &get() const { return text; }
+	unsigned size() const { return text.size(); }
+
+	void render(const Part &, const Geometry &) const;
+
+	Text &operator=(const std::string &);
+	//operator const std::string &() const { return text; }
+};
+
+} // namespace GLtk
+} // namespace Msp
+
+#endif
diff --git a/source/toggle.cpp b/source/toggle.cpp
index 9fbd098..550d97a 100644
--- a/source/toggle.cpp
+++ b/source/toggle.cpp
@@ -16,12 +16,13 @@ namespace GLtk {
 
 Toggle::Toggle(const Resources &r, const string &t):
 	Widget(r),
-	text(t),
+	text(style),
 	pressed(false),
 	value(false),
 	exclusive(false)
 {
 	update_style();
+	set_text(t);
 }
 
 void Toggle::set_text(const string &t)
@@ -72,7 +73,7 @@ void Toggle::button_release(int x, int y, unsigned btn)
 void Toggle::render_special(const Part &part) const
 {
 	if(part.get_name()=="text")
-		render_text(part, text);
+		text.render(part, geom);
 }
 
 void Toggle::exclude_siblings()
@@ -89,7 +90,7 @@ Toggle::Loader::Loader(Toggle &t):
 	Widget::Loader(t)
 {
 	add("exclusive", &Toggle::exclusive);
-	add("text",      &Toggle::text);
+	add("text",      &Loader::text);
 	add("value",     &Toggle::value);
 }
 
@@ -107,5 +108,10 @@ void Toggle::Loader::finish()
 		tgl.state&=~ACTIVE;
 }
 
+void Toggle::Loader::text(const string &t)
+{
+	static_cast<Toggle &>(wdg).text=t;
+}
+
 } // namespace GLtk
 } // namespace Msp
diff --git a/source/toggle.h b/source/toggle.h
index 794636e..f9a32fe 100644
--- a/source/toggle.h
+++ b/source/toggle.h
@@ -9,6 +9,7 @@ Distributed under the LGPL
 #define MSP_GLTK_TOGGLE_H_
 
 #include <sigc++/signal.h>
+#include "text.h"
 #include "widget.h"
 
 namespace Msp {
@@ -27,10 +28,11 @@ public:
 		Toggle &get_object() const;
 	private:
 		virtual void finish();
+		void text(const std::string &);
 	};
 
 private:
-	std::string text;
+	Text text;
 	bool pressed;
 	bool value;
 	bool exclusive;
diff --git a/source/widget.cpp b/source/widget.cpp
index 84d0425..7137260 100644
--- a/source/widget.cpp
+++ b/source/widget.cpp
@@ -58,6 +58,11 @@ void Widget::set_style(const string &s)
 	update_style();
 }
 
+void Widget::set_tooltip(const string &t)
+{
+	tooltip = t;
+}
+
 void Widget::set_visible(bool v)
 {
 	if(v==visible)
@@ -88,14 +93,18 @@ void Widget::render() const
 	for(PartSeq::const_iterator i=style->get_parts().begin(); i!=style->get_parts().end(); ++i)
 	{
 		if(i->get_name().empty())
-			render_graphic(*i);
+		{
+			GL::PushMatrix push_;
+			i->render(geom, state);
+		}
+			//render_graphic(*i);
 		else
 			render_special(*i);
 	}
 	GL::pop_matrix();
 }
 
-void Widget::render_graphic(const Part &part) const
+/*void Widget::render_graphic(const Part &part) const
 {
 	GL::push_matrix();
 	part.render(geom, state);
@@ -123,7 +132,7 @@ void Widget::render_text(const Part &part, const string &text) const
 	font->draw_string(text, imm);
 
 	GL::pop_matrix();
-}
+}*/
 
 void Widget::pointer_enter()
 {
diff --git a/source/widget.h b/source/widget.h
index 6774cbe..ce88c97 100644
--- a/source/widget.h
+++ b/source/widget.h
@@ -55,13 +55,17 @@ protected:
 	State state;
 	bool visible;
 	Container *parent;
+	std::string tooltip;
 
 	Widget(const Resources &);
 public:
 	virtual ~Widget();
+
 	void set_position(int, int);
 	void set_size(unsigned, unsigned);
+	virtual void autosize() { }
 	void set_geometry(const Geometry &);
+	const Geometry &get_geometry() const { return geom; }
 
 	/**
 	Sets the widget style.  The final style name is constructed by concatenating
@@ -70,16 +74,17 @@ public:
 	void set_style(const std::string &);
 	const Style &get_style() const { return *style; }
 
-	void set_visible(bool);
-	void set_focus();
+	void set_tooltip(const std::string &);
+	const std::string &get_tooltip() const { return tooltip; }
 
-	const Geometry &get_geometry() const { return geom; }
+	void set_visible(bool);
 	bool is_visible() const { return visible; }
+	void set_focus();
 
 	void render() const;
 protected:
-	void render_graphic(const Part &) const;
-	void render_text(const Part &, const std::string &) const;
+	/*void render_graphic(const Part &) const;
+	void render_text(const Part &, const std::string &) const;*/
 	virtual void render_special(const Part &) const { }
 
 public: