diff options
Diffstat (limited to 'src/nigui/private/gtk3')
| -rwxr-xr-x | src/nigui/private/gtk3/gtk3.nim | 1 | ||||
| -rwxr-xr-x | src/nigui/private/gtk3/platform_impl.nim | 45 |
2 files changed, 46 insertions, 0 deletions
diff --git a/src/nigui/private/gtk3/gtk3.nim b/src/nigui/private/gtk3/gtk3.nim index d4d1c8e..292bb09 100755 --- a/src/nigui/private/gtk3/gtk3.nim +++ b/src/nigui/private/gtk3/gtk3.nim @@ -462,6 +462,7 @@ proc cairo_set_source_surface*(cr, surface: pointer, x, y: cdouble) {.importc: " proc cairo_fill*(cr: pointer) {.importc: "cairo_fill", libgtk3.} proc cairo_stroke*(cr: pointer) {.importc: "cairo_stroke", libgtk3.} proc cairo_rectangle*(cr: pointer, x, y, width, height: cdouble) {.importc: "cairo_rectangle", libgtk3.} +proc cairo_arc*(cr: pointer, xc, yc, radius, angle1, angle2: cdouble) {.importc: "cairo_arc", libgtk3.} proc cairo_line_to*(cr: pointer, x, y: cdouble) {.importc: "cairo_line_to", libgtk3.} proc cairo_move_to*(cr: pointer, x, y: cdouble) {.importc: "cairo_move_to", libgtk3.} proc cairo_set_line_width*(cr: pointer, width: cdouble) {.importc: "cairo_set_line_width", libgtk3.} diff --git a/src/nigui/private/gtk3/platform_impl.nim b/src/nigui/private/gtk3/platform_impl.nim index 1a94e70..e535255 100755 --- a/src/nigui/private/gtk3/platform_impl.nim +++ b/src/nigui/private/gtk3/platform_impl.nim @@ -475,6 +475,51 @@ method drawRectOutline(canvas: Canvas, x, y, width, height: int) = cairo_set_line_width(cr, canvas.lineWidth) cairo_stroke(cr) +method drawEllipseArea(canvas: Canvas, x, y, width, height: int) = + let cr = cast[CanvasImpl](canvas).fCairoContext + if cr == nil: + raiseError("Canvas is not in drawing state.") + var rgba: GdkRGBA + canvas.areaColor.pColorToGdkRGBA(rgba) + gdk_cairo_set_source_rgba(cr, rgba) + cairo_save(cr) + let centerX = x.float + width.float / 2 + let centerY = y.float + height.float / 2 + cairo_translate(cr, centerX, centerY) + cairo_scale(cr, width.float / 2, height.float / 2) + cairo_arc(cr, 0, 0, 1, 0, 2 * PI) + cairo_fill(cr) + cairo_restore(cr) + +method drawEllipseOutline(canvas: Canvas, x, y, width, height: int) = + let cr = cast[CanvasImpl](canvas).fCairoContext + if cr == nil: + raiseError("Canvas is not in drawing state.") + var rgba: GdkRGBA + canvas.lineColor.pColorToGdkRGBA(rgba) + gdk_cairo_set_source_rgba(cr, rgba) + cairo_save(cr) + let centerX = x.float + width.float / 2 + let centerY = y.float + height.float / 2 + cairo_translate(cr, centerX, centerY) + cairo_scale(cr, width.float / 2, height.float / 2) + cairo_arc(cr, 0, 0, 1, 0, 2 * PI) + cairo_set_line_width(cr, canvas.lineWidth / width.float * 2) + # problem: width of horizontal line and vertical line is not the same + cairo_stroke(cr) + cairo_restore(cr) + +method drawArcOutline(canvas: Canvas, centerX, centerY: int, radius, startAngle, sweepAngle: float) = + let cr = cast[CanvasImpl](canvas).fCairoContext + if cr == nil: + raiseError("Canvas is not in drawing state.") + var rgba: GdkRGBA + canvas.lineColor.pColorToGdkRGBA(rgba) + gdk_cairo_set_source_rgba(cr, rgba) + cairo_arc(cr, centerX.float, centerY.float, radius, startAngle, sweepAngle) + cairo_set_line_width(cr, canvas.lineWidth) + cairo_stroke(cr) + method drawImage(canvas: Canvas, image: Image, x, y = 0, width, height = -1) = let cr = cast[CanvasImpl](canvas).fCairoContext if cr == nil: |