Merge branch 'dev-docs' into dev-Buttons_Gradient

src/Bilder.qrc

@@ -10,5 +10,6 @@
         <file>icons/line-tool.svg</file>
         <file>icons/flood-fill-tool.svg</file>
         <file>icons/plain-tool.svg</file>
+        <file>icons/gradient-tool.svg</file>
     </qresource>
 </RCC>

src/GUI/IntelliPhotoGui.cpp

@@ -710,12 +710,12 @@ void IntelliPhotoGui::createGui(){
 		FloodFillButton->setIconSize(Buttonsize);
 		FloodFillButton->setCheckable(true);
 
-		preview = QPixmap(":/Icons/Buttons/icons/icon.png");
-		GradientButton = new QPushButton();
-		GradientButton->setFixedSize(Buttonsize);
-		GradientButton->setIcon(preview);
-		GradientButton->setIconSize(Buttonsize);
-		GradientButton->setCheckable(true);
+        preview = QPixmap(":/Icons/Buttons/icons/gradient-tool.svg");
+        GradientButton = new QPushButton();
+        GradientButton->setFixedSize(Buttonsize);
+        GradientButton->setIcon(preview);
+        GradientButton->setIconSize(Buttonsize);
+        GradientButton->setCheckable(true);
 
 		preview = QPixmap(":/Icons/Buttons/icons/line-tool.svg");
 		LineButton = new QPushButton();

src/icons/gradient-tool.svg

@@ -0,0 +1,135 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="256"
+   height="256"
+   viewBox="0 0 67.733332 67.733335"
+   version="1.1"
+   id="svg8"
+   sodipodi:docname="gradient-tool.svg"
+   inkscape:version="0.92.4 (f8dce91, 2019-08-02)">
+  <defs
+     id="defs2">
+    <linearGradient
+       inkscape:collect="always"
+       id="linearGradient108">
+      <stop
+         style="stop-color:#00ff00;stop-opacity:1"
+         offset="0"
+         id="stop104" />
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+         id="stop114"
+         offset="0.26227671"
+         style="stop-color:#ffcc00;stop-opacity:1" />
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+         offset="0.49107137"
+         style="stop-color:#ff6600;stop-opacity:1" />
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+         style="stop-color:#d40000;stop-opacity:1"
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+         id="stop116" />
+      <stop
+         style="stop-color:#00ffff;stop-opacity:1"
+         offset="1"
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+         style="stop-color:#d40000;stop-opacity:0;"
+         offset="1"
+         id="stop34" />
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+       inkscape:collect="always"
+       xlink:href="#linearGradient36"
+       id="linearGradient38"
+       x1="147.98735"
+       y1="176.19795"
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+       y2="106.49742"
+       gradientUnits="userSpaceOnUse" />
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+       inkscape:collect="always"
+       xlink:href="#linearGradient108"
+       id="linearGradient110"
+       x1="0"
+       y1="296.99997"
+       x2="67.73333"
+       y2="229.26665"
+       gradientUnits="userSpaceOnUse" />
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+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="2.8"
+     inkscape:cx="105.15717"
+     inkscape:cy="134.5586"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     showguides="false"
+     inkscape:window-width="1853"
+     inkscape:window-height="1025"
+     inkscape:window-x="67"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
+     inkscape:snap-page="true" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
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+     inkscape:groupmode="layer"
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+    <path
+       style="fill:none;stroke:#000000;stroke-width:2.117;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;stroke-miterlimit:4;stroke-dasharray:none"
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+</svg>