Fixes and enhancements from my MCPE repository. (https://github.com/mschiller890/mcpe64)

src/client/gui/screens/CreditsScreen.cpp

@@ -0,0 +1,118 @@
+#include "CreditsScreen.h"
+#include "StartMenuScreen.h"
+#include "OptionsScreen.h"
+#include "../../Minecraft.h"
+#include "../components/Button.h"
+#include "../components/ImageButton.h"
+
+CreditsScreen::CreditsScreen()
+: bHeader(NULL), btnBack(NULL)
+{}
+CreditsScreen::~CreditsScreen() {
+    if (bHeader) delete bHeader;
+    if (btnBack) delete btnBack;
+}
+
+void CreditsScreen::init() {
+    bHeader = new Touch::THeader(0, "Credits");
+    btnBack = new ImageButton(1, "");
+    {
+        ImageDef def;
+        def.name = "gui/touchgui.png";
+        def.width = 34;
+        def.height = 26;
+        def.setSrc(IntRectangle(150, 0, (int)def.width, (int)def.height));
+        btnBack->setImageDef(def, true);
+    }
+    buttons.push_back(bHeader);
+    buttons.push_back(btnBack);
+
+    // prepare text lines
+    _lines.clear();
+    _lines.push_back("Minecraft: Pocket Edition");
+    _lines.push_back("Original game by Mojang");
+    _lines.push_back("");
+    _lines.push_back("Programmers:");
+    _lines.push_back("mschiller890");
+    _lines.push_back("InviseDivine");
+    _lines.push_back("Kolyah35");
+    _lines.push_back("");
+    _lines.push_back("[Gold]Join our Discord server:[/Gold] [Green]url.....[/Green]");
+    _scrollSpeed = 0.5f;
+    _scrollY = height; // start below screen
+}
+
+void CreditsScreen::setupPositions() {
+    int buttonHeight = btnBack->height;
+    btnBack->x = width - btnBack->width;
+    btnBack->y = 0;
+    if (bHeader) {
+        bHeader->x = 0;
+        bHeader->y = 0;
+        bHeader->width = width - btnBack->width;
+        bHeader->height = btnBack->height;
+    }
+
+    // reset scroll starting position when screen size changes
+    _scrollY = height;
+}
+
+void CreditsScreen::tick() {
+    // move text upward
+    _scrollY -= _scrollSpeed;
+    // if text has scrolled off the top, restart
+    float totalHeight = _lines.size() * (minecraft->font->lineHeight + 8);
+    if (_scrollY + totalHeight < 0) {
+        _scrollY = height;
+    }
+}
+
+void CreditsScreen::render(int xm, int ym, float a) {
+    renderBackground();
+    super::render(xm, ym, a);
+    int w = width;
+    Font* font = minecraft->font;
+    float y = _scrollY;
+    const float lineHeight = font->lineHeight + 8;
+    for (size_t i = 0; i < _lines.size(); ++i) {
+        const std::string& line = _lines[i];
+        // use color-tag-aware drawing, centre by total width
+        float lineWidth = Gui::getColoredWidth(font, line);
+        Gui::drawColoredString(font, line, w/2 - lineWidth/2, (int)y, 255);
+        // underline hyperlink lines manually
+        if (line.find("http") != std::string::npos || line.find("discord.gg") != std::string::npos) {
+            float x0 = w/2 - lineWidth/2;
+            float y0 = y + font->lineHeight - 1;
+            this->fill(x0, y0, x0 + lineWidth, y0 + 1, 0xffffffff);
+        }
+        y += lineHeight;
+    }
+}
+
+void CreditsScreen::buttonClicked(Button* button) {
+    if (button->id == 1) {
+        minecraft->setScreen(new OptionsScreen());
+    }
+}
+
+void CreditsScreen::mouseClicked(int x, int y, int buttonNum) {
+    // map click to a line in the scrolling text
+    const float lineHeight = minecraft->font->lineHeight + 8;
+    for (size_t i = 0; i < _lines.size(); ++i) {
+        float lineY = _scrollY + i * lineHeight;
+        if (y >= lineY && y < lineY + lineHeight) {
+            const std::string& line = _lines[i];
+            size_t start = line.find("http");
+            if (start == std::string::npos)
+                start = line.find("discord.gg");
+            if (start != std::string::npos) {
+                // extract until space
+                size_t end = line.find(' ', start);
+                std::string url = line.substr(start, (end == std::string::npos) ? std::string::npos : end - start);
+                minecraft->platform()->openURL(url);
+                return;
+            }
+        }
+    }
+    super::mouseClicked(x, y, buttonNum);
+}