UI: Set min/max zoom levels for preview

Prevents the preview from zooming in or out too far. Min zoom: 10% Max zoom: 1000%
obsproject · Mar 5, 2023 · b464ba8 · b464ba8
1 parent 03a94ae
commit b464ba8
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/UI/window-basic-preview.cpp b/UI/window-basic-preview.cpp
@@ -2255,6 +2255,8 @@ void OBSBasicPreview::ResetScrollingOffset()
 
 void OBSBasicPreview::SetScalingLevel(int32_t newScalingLevelVal)
 {
+	newScalingLevelVal = std::clamp(newScalingLevelVal, -MAX_SCALING_LEVEL,
+					MAX_SCALING_LEVEL);
 	float newScalingAmountVal =
 		pow(ZOOM_SENSITIVITY, float(newScalingLevelVal));
 	scalingLevel = newScalingLevelVal;

diff --git a/UI/window-basic-preview.hpp b/UI/window-basic-preview.hpp
@@ -18,7 +18,9 @@ class QMouseEvent;
 #define ITEM_BOTTOM (1 << 3)
 #define ITEM_ROT (1 << 4)
 
-#define ZOOM_SENSITIVITY 1.125f
+#define MAX_SCALING_LEVEL 20
+#define MAX_SCALING_AMOUNT 10.0f
+#define ZOOM_SENSITIVITY pow(MAX_SCALING_AMOUNT, 1.0f / MAX_SCALING_LEVEL)
 
 #define SPACER_LABEL_MARGIN 6.0f