GUI: Add DropdownButtonWidget and use it in the launcher for mass add

DropdownButtonWidget is a button split in two parts vertically. Clicking
the left part triggers a default action. Clicking the right part shows a
list of other actions the user can choose from.

Using this widget on the launcher lets 'Mass add' be a secondary action
of the 'Add' button, removing the necessity of pressing the shift key to
access the feature.

1 files changed, 38 insertions, 3 deletions

diff --git a/graphics/VectorRenderer.cpp b/graphics/VectorRenderer.cpp
index e226e45475..bcab4bf5a2 100644
--- a/graphics/VectorRenderer.cpp
+++ b/graphics/VectorRenderer.cpp
@@ -52,13 +52,48 @@ void VectorRenderer::drawStep(const Common::Rect &area, const Common::Rect &clip
 	setGradientFactor(step.factor);
 	setStrokeWidth(step.stroke);
 	setFillMode((FillMode)step.fillMode);
-	setClippingRect(clip);
+	setClippingRect(applyStepClippingRect(area, clip, step));
 
 	_dynamicData = extra;
 
 	(this->*(step.drawingCall))(area, step);
 }
 
+Common::Rect VectorRenderer::applyStepClippingRect(const Common::Rect &area, const Common::Rect &clip, const DrawStep &step) {
+	if (step.clip == Common::Rect()) {
+		return clip;
+	}
+
+	Common::Rect finalClip = clip;
+	if (step.clip.left > 0) {
+		finalClip.left = area.left + step.clip.left;
+	} else if (step.clip.left < 0) {
+		finalClip.left = area.right + step.clip.left;
+	}
+
+	if (step.clip.top > 0) {
+		finalClip.top = area.top + step.clip.top;
+	} else if (step.clip.top < 0) {
+		finalClip.top = area.bottom + step.clip.top;
+	}
+
+	if (step.clip.right > 0) {
+		finalClip.right = area.left + step.clip.right;
+	} else if (step.clip.right < 0) {
+		finalClip.right = area.right + step.clip.right;
+	}
+
+	if (step.clip.bottom > 0) {
+		finalClip.bottom = area.top + step.clip.bottom;
+	} else if (step.clip.bottom < 0) {
+		finalClip.bottom = area.bottom + step.clip.bottom;
+	}
+
+	finalClip.clip(clip);
+
+	return finalClip;
+}
+
 int VectorRenderer::stepGetRadius(const DrawStep &step, const Common::Rect &area) {
 	int radius = 0;
 
@@ -102,7 +137,7 @@ void VectorRenderer::stepGetPositions(const DrawStep &step, const Common::Rect &
 		}
 	} else {
 		in_x = area.left + step.padding.left;
-		in_w = area.width();
+		in_w = area.width() - step.padding.left - step.padding.right;
 	}
 
 	if (!step.autoHeight) {
@@ -133,7 +168,7 @@ void VectorRenderer::stepGetPositions(const DrawStep &step, const Common::Rect &
 		}
 	} else {
 		in_y = area.top + step.padding.top;
-		in_h = area.height();
+		in_h = area.height() - step.padding.top - step.padding.bottom;
 	}
 
 	if (step.scale != (1 << 16) && step.scale != 0) {