Added an ability to draw a text using TextBox

ValeriiKoniushenko · Jul 31, 2023 · b5cc138 · b5cc138
1 parent 75de47f
commit b5cc138
Show file tree

Hide file tree

Showing 4 changed files with 51 additions and 4 deletions.
diff --git a/game/source/VaKon2D.cpp b/game/source/VaKon2D.cpp
@@ -60,11 +60,11 @@ void VaKon2D::start()
 	texture.setMagAndMinFilter(Gl::Texture::MagFilter::Linear, Gl::Texture::MinFilter::LinearMipmapLinear);
 
 	Font font("assets/fonts/Roboto-Medium.ttf");
-	LineText text;
-	text.setText("Hello\nworld");
+	TextBox text;
 	text.setFont(font);
+	text.setText("Hello\nworld");
 	// text.setTexture(texture);
-	text.setColor({ 255, 0, 0 });
+	// text.setColor({ 255, 0, 0 });
 	text.prepare(shaderPack);
 	// text.setPosition({100.f, 50.f});
 	// text.prepare(shaderPack);

diff --git a/lib/core/shapes/include/LineText.h b/lib/core/shapes/include/LineText.h
@@ -52,6 +52,7 @@ class LineText : public Widget
 	void setText(const std::string& text);
 
 	_NODISCARD float getTextWidth() const;
+	_NODISCARD float getTextHeight() const;
 	_NODISCARD float getFontSize() const;
 	void setFontSize(float size);
 
@@ -77,6 +78,7 @@ class LineText : public Widget
 	std::string text_;
 	std::string lastSavedText_;
 	mutable float textWidth_ = -1.f;
+	mutable float textHeight_ = -1.f;
 	Vbo vbo_;
 	Vao vao_;
 	float fontSize_ = 24.f;

diff --git a/lib/core/shapes/source/LineText.cpp b/lib/core/shapes/source/LineText.cpp
@@ -81,6 +81,7 @@ void LineText::updateCache()
 		const float ypos = position.y - static_cast<float>(ch.size.y - ch.bearing.y) * scale - offsetY * scale;
 		const float w = static_cast<float>(ch.size.x) * scale;
 		const float h = static_cast<float>(ch.size.y) * scale;
+		textHeight_ = h;
 
 		// clang-format off
 		std::vector<float> vertices = {
@@ -232,6 +233,36 @@ float LineText::getTextWidth() const
 	return textWidth_;
 }
 
+float LineText::getTextHeight() const
+{
+	if (lastSavedText_ == text_)
+	{
+		return textHeight_;
+	}
+
+	textHeight_ = 0;
+	const float scale = fontSize_ / Font::defaultRenderSize;
+
+	for (auto ch : text_)
+	{
+		if (!font_)
+		{
+			spdlog::get("core")->warn("Can't get character without font");
+			BOOST_ASSERT_MSG(false, "Can't get character without font");
+			break;
+		}
+
+		const auto& oneChar = font_->getCharacter(ch);
+		auto height = static_cast<float>(oneChar.bearing.y) * scale;
+		if (height > textHeight_)
+		{
+			textHeight_ = height;
+		}
+	}
+
+	return textHeight_;
+}
+
 void LineText::setColor(const Color& color)
 {
 	color_ = color;

diff --git a/lib/core/shapes/source/TextBox.cpp b/lib/core/shapes/source/TextBox.cpp
@@ -25,6 +25,7 @@
 #include "Font.h"
 #include "LineText.h"
 #include "ShaderPack.h"
+#include "Logger.h"
 
 #include <boost/algorithm/string.hpp>
 
@@ -35,6 +36,13 @@ std::string TextBox::getComponentName() const
 
 void TextBox::setText(const std::string& text)
 {
+	if (!font_)
+	{
+		spdlog::get("core")->critical("Can't set text without a font");
+		BOOST_ASSERT_MSG(font_, "Can't set text without a font");
+		return;
+	}
+
 	std::vector<std::string> strings;
 	boost::split(strings, text, boost::is_any_of("\n"));
 
@@ -43,7 +51,13 @@ void TextBox::setText(const std::string& text)
 	std::size_t i = 0;
 	for (auto& lineText : rows_)
 	{
-		lineText.setText(strings[i++]);
+		lineText.setText(strings[i]);
+		lineText.setFont(*font_);
+		if (i != 0)
+		{
+			lineText.move({0.f, lineText.getTextHeight()});
+		}
+		++i;
 	}
 }